In the Czech Agriculture sprayers used a variety of manufacturers, which particularly differ construction of the main functional unit, which has a significant impact on pesticide application. Goal of this paper is to compare the mode of application of protective agents sprayer with and without air support and assess the impact of pesticides on the environment (biodiversity,soil) and activity sprayer.

The fact that a building is covered by a well-arranged fire protection is today a basic precondition for the safety of a building. Good and organized fire protection is also an essential part of a good safety culture. For this reason, it is common for buildings to be equipped with a higher fire protection than what is required by current regulations. In buildings intended for hotel services, sprinklers are usually installed even though it is not required. Fans in operation is a protection method for the ventilation that falls within the framework of analytical dimensioning, where an analysis is required to verify the formation. As the name implies, fans in the operating solution are based on the fans continuing to run in the event of a fire, the protection mechanism is that the pressure in the supply air duct must be overcome by the fire pressure before the fire gases can spread. As a calculation basis for the verification, the fire pressure (when sprinklers are not used) amounts to 1500 Pa and the fire gases temperature in the early stage of the fire to 350 ͦ C according to Boverkets “allmänna råd” (BFS 2013: 2) on analytical dimensioning of buildings fire protection (BBRAD3). When using sprinklers, these values ​​are expected to be much lower, which should also change the conditions for fire protection design. Together with the fans in operation method, self-actuating backflow protectors is often used, which completely restricts the flow in the supply air duct when the fire pressure becomes too high and the flow reverses, but these are relatively costly. The thesis mainly aims to investigate whether deviations from the fire technical installation of backflow protection can be made in buildings where sprinklers have been installed. This in the hope of finding more cost-effective solutions and at the same time achieve satisfactory fire protection. To get an answer to if the deviation can be made, the computer programs Fire Dynamics Simulator (FDS), Program Flow System (PFS) and material from an existing project have been used. As a complement, a small literature study has also been done to gain a basic understanding of the underlying theory and to substantiate proposed solutions. Various CFD (Computational Fluid Dynamics) programs are often used in many engineering professions. The basis for the programs is that they are based on flow calculations based on the Navier-Stokes equations. FDS is a CFD program adapted for simulations of fire scenarios. PFS is a ventilation program where flows can be calculated, both during normal circumstances and in the happening of fire. In FDS, a hotel room was built based on the existing project and requirements from BBRAD3. Based on data given in the FDS runs, the fire gas spread via the ventilation system was calculated using PFS. The result shows that a possible design of the ventilation technical fire protection without backflow damper is not possible to achieve a satisfactory fire protection. This is because the spread of fire gases to the adjacent fire compartment exceeded the requirement of 1% of its volume. The results show, however, that there are several different acceptable ventilation technical solutions in the form of an increased capacity of the supply air fan in the event of a fire or by installing a flow adjustment damper on the supply air duct. When applying the flow adjustment damper as a fire technical solution, the result has shown that with a 200 Pa pressure relief on the damper, the fire gas spread is less than the 1% requirement. When the pressure in the supply air ducts becomes higher, the possibility of fire gases spreading becomes more difficult. As the estimated fire gas spread was below the requirements, this solution is also considered to be applicable in buildings that are slightly more airtight than the building studied. A disadvantage, however, is that more powerful fans for the supply air will have to be used, which can increase operating costs and energy use. The other proposed fire technical solution was to increase the capacity of the supply air fan from normal operating function to 350 Pa and 380 Pa pressure effect in the event of a fire. This function is intended to be connected to the building's fire alarm. In the event of a fire, the fire alarm should be activated at an initial stage so that the supply air fan can reach the selected capacity within 44 seconds. Since at 44 seconds the normal pressure drop of 50 Pa in the supply air duct is overcome, which means that fire gas spread from the fire compartment to adjacent fire compartments is initiated. The application of an existing or external supply air fan whose capacity only increases if it is activated by a fire alarm is the report's main solution for maintaining satisfactory fire protection when substituting a backflow damper. This is because the solution is considered to be the most cost-effective. / Att en byggnad omfattas av ett väl anordnat brandskydd är idag en grundläggande förutsättning för en byggnads säkerhet. Ett bra och organiserat brandskydd är även en väsentlig del av en god säkerhetskultur. Av denna anledning är det vanligt att byggnader utrustas med ett högre brandtekniskt brandskydd än vad som är kravställt enligt gällande regelverk. I byggnader som avses för hotellverksamhet finns oftast sprinkler installerat, trots att det inte är kravställt. Fläktar i drift är en ventilationstekniks skyddsmetod som går inom ramen för s.k. analytisk dimensionering, där en analys krävs för att verifiera utformningen. Som man hör på namnet bygger fläktar i driftlösningen på att fläktarna fortsätter att gå vid händelse av brand, skyddsmekanismen är att trycket i tilluftskanalen måste övervinnas av brandtrycket innan spridning kan ske. Som beräkningsgrund vid verifieringen uppgår brandtrycket vanligtvis (när sprinkler ej nyttjas) till 1500 Pa och brandgastemperaturen i branden tidiga stadie till 350 ͦC enligt Boverkets allmänna råd (BFS 2013:2) om analytisk dimensionering av byggnaders brandskydd (BBRAD3). Vid användandet av sprinkler förväntas dessa värden bli mycket lägre, vilket även bör ändra förutsättningarna till brandskyddet utformning. Tillsammans med fläktar i drift nyttjas ofta backströmningsskydd som helt stryper flödet i tilluftskanalen (där risken för brandgasspridning är) när brandtrycket blir för högt och flödet vänder, dessa är dock relativt kostnadsdrivande. Examensarbetet syftar främst på att undersöka om avsteg från den brandtekniska installationen av backströmningskydd kan göras i byggnader där sprinkler har installerats. Detta i hopp om att hitta mer kostnadseffektiva lösningar och samtidigt uppnå ett tillfredställande brandskydd. För att få svar på avsteget kan göras har datorprogrammen Fire Dynamics Simulator (FDS), Program Flow System (PFS) samt material från ett befintligt projekt nyttjats. Som komplement har även en mindre litteraturstudie gjorts för att få grundförståelse för den bakomliggande teorin samt att styrka föreslagna lösningar. Olika CFD-program (Computional Fluid Dynamics) nyttjas ofta inom många ingenjörsyrken. Grunden för programmen är att de bygger på flödesberäkningar som utgår ifrån Navier-Stokes ekvationer. FDS är ett CFD-program anpassat för simuleringar av brandscenarion. PFS är ett ventilationsprogram där flöden kan beräknas, både vid normal- och branddrift. I FDS byggdes ett hotellrum upp utifrån det befintliga projektet samt krav från BBRAD3. Utifrån data givet i FDS-körningarna beräknades brandgasspridningen via ventilationssystemet med hjälp av PFS. Resultatet påvisar att en eventuell utformning av det ventilationstekniska brandskyddet utan backströmningspjäll ej är möjligt för att uppnå ett tillfredställande brandskydd. Detta med anledning av att brandspridningen till intilliggande brandcell översteg kravet på 1% av dess volym. Resultatet visar dock att det finns flera olika godtagbara ventilationstekniska lösningar i form av en ökad kapacitet på tilluftsfläkten vid händelse av brand eller genom en installation av ett injusteringspjäll på tilluftskanalen. Vid tillämpning av injusteringspjäll som brandteknisk lösning har resultatet påvisat att vid en 200 Pa tryckavlastning på spjället understiger brandgasspridningen 1%-kravet. När trycket i tilluftskanalerna blir högre, försvåras möjligheten för brandgaser att sprida sig. Då den beräknade brandgasspridningen understeg kravställningen, anses denna lösning även kunna tillämpas i byggnader som är något tätare än den aktuella byggnaden. En nackdel är dock att kraftigare fläktar för tilluften kommer behöva nyttjas vilket kan öka driftkostnaderna och energianvändningen. Den andra föreslagna brandtekniska lösningen var att öka kapacitet på tilluftsfläkten från normal driftsfunktion till 350 Pa respektive 380 Pa tryckverkan i det fall då brand uppstått, denna funktion är tänkt att vara kopplad till byggnadens brandlarm. Vid händelse av brand bör brandlarmet aktiveras i ett inledande skede så att tilluftsfläkten kan nå utvald kapacitet inom 44 sekunder. Detta med anledning av att vid denna tidpunkt övervinns det normala tryckfallet på 50 Pa i tilluftskanalerna, vilket innebär att brandgasspridning från brandrummet mot intilliggande brandceller inleds. Tillämpningen av en befintlig eller extern tilluftsfläkt vars kapacitet endast ökar i det fall då den aktiveras av ett brandlarm bedöms utgöra rapportens främsta brandtekniska lösning för att upprätthålla ett tillfredställande brandskydd vid substitution av ett backströmningspjäll. Detta då lösningen anses vara den mest kostnadseffektiva samtidigt som det innebär en smidigare tillämpning.

Two field sites with soil limitations, supported by column and laboratory studies, were used to evaluate spray irrigation as an alternative methodology for onsite wastewater treatment and disposal. The first site was located in Montgomery Co., VA on a Chilhowie soil (very-fine, mixed, mesic Typic Hapludalf) and the second was located in Alleghany Co., VA on a variant of the Monongahela series (fine-loamy, mixed, mesic Typic Fragiudult). Secondary pretreatment and disinfection of the effluent was performed before application through a slow rate spray irrigation system to the soil-plant system. Effluent application rates were based on the hydraulic and N assimilative capacities of the soil-plant system. Effluent applications of 1.25 and 2.5 cm wk⁻¹ were examined at both sites. After 20 months of effluent application at the Montgomery Co. site and 12 months of application at the Alleghany Co. site, adequate wastewater renovation was occurring in both sites. Water analyses at the 60 cm depth showed no potential groundwater contamination problems. Significant increases in chloride concentrations and EC measurements in the subsurface waters at both sites along with little or no increases in nitrate, ammonium, or phosphorus levels indicated that the effluent was being renovated as it percolated vertically through the soil profile. Runoff water quality measurements from the spray irrigation sites indicated no serious threat to nearby surface waters. Proper filtration of the sheet flow along with the relatively low loading rates, contributed to the good quality of runoff waters in both winter and summer seasons. Plant tissue analysis indicated that plant uptake of N was a large N sink during the growing season. Denitrification column studies examined the effect of different effluent application frequencies. There were no differences between irrigation frequencies in the amount of nitrous oxide accumulated after 24 h except in columns that were suspected to contain pockets of carbon particulates which contributed to high denitrification activity. Single daily effluent applications produced extended periods of low N₂O emissions, while more frequent effluent applications produced short periods (1-3 h) of rapid N₂O emission rates immediately after effluent applications. The denitrification capacity of the soils was shown to be limited by both C and NO₃-N. Results from the denitrification column studies suggested that there is potential for optimizing N loss in spray irrigation systems by maintaining effluent in the microbially active topsoil through proper effluent application frequencies. Both the field and column studies demonstrated that acceptable renovation of surface applied effluent by slow rate spray irrigation systems on sites with soil limitations can be obtained. / Ph. D.

Integrating water-saving technologies with optimized nutrient management strategies provides opportunities for sustainable agriculture in the Mississippi Delta. Three studies were conducted to determine the effects of irrigation systems, row patterns, and nutrient management strategies on corn and soybeans. The first study determined the effects of irrigation, row pattern, and nitrogen (N) placement methods on corn (Zea mays L.) productivity and N use efficiency. The effects of N placement methods were only evident in 2021 when the rainfall events were more pronounced than in 2020. Regardless of the row pattern, placing N with one knife increased corn grain yield and the agronomic N use efficiency by 14.1% and 16.8%, respectively, when compared to the surface dribble method. The second study investigated the effects of irrigation systems and row patterns on grain yield, grain quality parameters, and irrigation water use efficiency (IWUE) on soybeans (Glycine max L.) grown on Sharkey clay. When irrigation was triggered at -80 kPa, furrow-irrigated soybeans produced 3.9% more grain yield compared to sprinkler-irrigated soybeans. The total amount of water applied by the sprinkler irrigation system represented 19-52% of the total amount applied by the furrow system. Narrow-row patterns achieved greater IWUE than single-row patterns. In the third study, we evaluated the effects of N and irrigation levels on grain quantity, quality, and plant growth on corn grown across different soil electrical conductivity (EC) levels and its implications for variable rate technology. Corn grain yields increased with the increase of N and irrigation levels but decreased as soil EC decreased. Overall, maintaining a sprinkler irrigation threshold between -40 and -70 kPa optimized corn yield. In addition, these results did not provide enough evidence to use variable rate irrigation or variable rate N application in the Mississippi Delta.

No description available.

I denna studie har det utforskats skillnader mellan två olika typer av brandsläckningssystem:traditionella vattensprinklersystem och högtrycksvattendimma med avseende påbrandskyddsegenskaper samt miljö och hållbarhetsaspekterna. Syftet med denna studie är attförbättra förståelsen av de två olika systemen och dess användning för brandbekämpning.Traditionella vattensprinklersystem visade sig erbjuda effektiv branddetektion och respons tackvare värmekänsliga glasbulber och var särskilt effektiva i stora öppna utrymmen. Dessutomframstod dessa två vattensprinklersystemen som mycket lämpliga för miljöer med hög fibrositetsom till exempel sågverk.Högtrycksvattendimma erbjuder flera fördelar, såsom tidig branddetektion och respons, samt enmer effektiv brandsläckningsförmåga. Systemet använder små vattendroppar som avges medhögt tryck, vilket skapar en större täckningsyta och leder till upp till 90% mindrevattenanvändning. Detta minskar risken för vattenskador och gör systemet särskilt lämpligt föranvändning i trånga utrymmen och för skydd av objekt som Li-jonbatterier, samt i de flestaandra miljöer med undantag för dem där material med hög fibrositet förekommer.Miljömässigt visade sig vattendimma vara överlägsen utifrån flera olika aspekter. Det gällermindre vattenanvändning vilket därmed leder till mindre miljöfarligt brandvatten som behöverhanteras efter brandsläckning. Det uppnås även högre energieffektivitet och därmed lägrekoldioxidutsläpp på grund av att pumpen inte behöver hantera lika mycket vatten som med etttraditionellt sprinklersystem. Högtrycksvattendimma bidrar även till förbättrad luftkvalitet föratt den fokuserar på att bekämpa de farliga brandgaserna.Sammanfattningsvis har denna studie bidragit med viktiga insikter och analytiska slutsatser,som erbjuder en förstärkt förståelse av de jämförda brandskyddssystemen. Analyserna påvisaratt både högtrycksvattendimma och traditionella vattensprinklersystem har sina specifikafördelar beroende på deras tillämpningsområden. Syftet med studien var att undersöka ochjämföra dessa två system med avseende på deras brandbekämpningsförmåga för att bidra till enmer effektiv och optimerad brandbekämpning. Det har bristat med information från tidigarestudier vilket gör ämnet väldigt intressant att undersöka mer för framtida studier. / This study explores differences between two types of fire suppression systems: traditional watersprinkler system and high-pressure water mist system from the perspective of fire protection aswell as environmental properties. The purpose of this study is to gain a deeper understanding ofthese two systems and their use for fire protection.Traditional water sprinkler systems systems showed to offer effective fire detection and quickresponse thanks to heat-sensitive glass bulbs. It was also particiularly more effective in largeopen spaces. Traditional water sprinklers have also appeared to be effective for enfironmentswith high fibrosity, such as sawmills.High-pressure water has shown several advantages, such as early fire detection and responsetime, as well as a more efficient fire extinguishing capacity. The system uses small waterdroplets discharged at high pressure, which creates a larger coverage area and leads to up to90% less water usage. This reduces the risk of water damage and makes the system particularlysuitable for use in confined spaces and for protecting objects like lithium-ion batteries, as wellas in most other environments except those with high fibrosity.From an environmental perspective, water mist proved to be superior from several aspects. Thisincludes reducing water usage, which leads to less, environmentally hazardous firewater, thatneeds to be managed after extinguishing a fire. Higher energy efficiency is also achieved,resulting in lower carbon dioxide emissions because the pump does not need to handle as muchwater as a traditional sprinkler system. High-pressure water mist also contributes to improvedair quality by suppressing hazardous fire gases.In conclusion this study has shown important insights and conclusions, offering a betterunderstanding of the compared fire protection systems. The analyses indicate that both high-pressure water mist and traditional water sprinkler systems have their specific advantagesdepending on their usage areas. The purpose of the study was to investigate and compare thesetwo systems with regard to their fire-fighting capabilities, contributing to a more efficient firesuppression. There has been a lack of information from previous studies, making the subjectvery interesting to explore more in future studies.

An engineering method has been developed for calculating the blowdown of agent from a pressurized dry chemical fire suppression system supply cylinder, and the flow rate of agent through a piping delivery system. Its goal is to provide the means to determine the blowdown time and agent delivery capabilities of pre-engineered and simple engineered systems. The method is based on the treatment of the two-phase powder-gas flow as an equivalent fluid with thermodynamic properties that account for agent composition and the relative proportions of agent and gas propellant. The mixture is treated as compressible, and the expansion in the supply tank is assumed isentropic. A key assumption in the model is that the agent (powder) mass fraction remains constant, in both the tank and delivery system. Laboratory tests were conducted to examine the validity of the model and its assumptions. Simple systems were discharged to measure pressures in the cylinder and nozzle inlet during discharge, and the mass of agent discharged. A 0.43 cubic foot cylinder containing 0-25 lbm of either sodium bicarbonate or moammonium phosphate, pressurized at up to 300 psig of nitrogen, was discharged, either alone, or with an 8-foot length of piping and a single nozzle. For the cylinder by itself, gas alone pressurized to 300 psig discharged in 1.5 seconds, while 25 lbm of sodium bicarbonate agent pressurized to 300 psig discharged in 5.2 seconds with 0.10 lbm of agent remaining in the cylinder after discharge. There was no significant difference in the discharge times or residual masses in the cylinder after discharge between the sodium bicarbonate and monoammonium phosphate agents. For a cylinder-pipe-nozzle system, gas-alone discharges pressurized to 300 psig took 7 seconds, while 25 lbm of sodium bicarbonate agent pressurized to 300 psig discharged in 26 seconds with 0.64 lbm of residual agent in the cylinder after discharge. Predictions generated by the model were compared with test results. Cylinder alone gas-only discharge model predictions agreed well with test data for the full duration of tests using a discharge coefficient of 0.380 to characterize the gas flow through the dip tube / valve assembly; a simple isentropic analytical model gave a good prediction using a discharge coefficient of 0.430. Gas-solids predictions using a discharge coefficient of 0.500 agreed well with test data up to the observed inflection point near the end of discharge. This inflection point is caused by the agent in the cylinder reaching the bottom of the dip tube, resulting in reduced flow of agent from the cylinder, and thus reducing the mass fraction of the flow. Cylinder-pipe-nozzle model discharge predictions for gas-only discharges agreed well with test data for the full duration of tests using a discharge coefficient of 0.470 for the 0.173-inch diameter nozzle used in the testing. Model predictions agreed well with the gas-solids mixture test data up to the inflection point, using a discharge coefficient of 0.999. The constant mass fraction assumption results in residual agent mass predictions of 2.0 lbm or more after discharge. Test data shows 0.6 lbm or less of residual. This residual discrepancy, and the presence of the inflection point observed in solids-gas tests, suggests that the constant mass fraction assumption is not adequate to accurately model agent discharge from the cylinder. Using an appropriate discharge coefficient, the model can be used to determine approximate discharge times for simple systems.

Thesis (MBA)--Stellenbosch University, 2012. / This research study analyses the market potential for the Floppy Sprinkler irrigation system in the global market. It explores the global irrigation market and its environment to identify the driving forces that influence the industry as well as the potential that Floppy Sprinkler could unleash as a competitor. The researcher assesses the industry value chain to determine the fit and alliance opportunities for Floppy Sprinkler in the value chain. The study further analyses the competitive pressures influencing the competitive environment. Applied research is used in this study to gain a comprehensive understanding of the market. Acknowledged diagnostic models in the field of strategic management were used to guide the study. These included the PESTLE analysis to evaluate the macro-environment of the agriculture sector; the value chain analysis to assess the agricultural industry value chain; Porter’s Five Forces Model to analyse the competitive pressures for Floppy Sprinkler; and the SWOT analysis to identify the strengths, weaknesses, opportunities and threats. The relevant data were collected through both primary and secondary sources. Two questionnaires were designed, the first to industry specialists in the agriculture sector with the purpose to gain insight of the irrigation and agriculture environment; and the second to Floppy Sprinkler irrigation system users, with the purpose to obtain a rating, opinion and relevance of the product in the market. The research disclosed that forces within the macro environment influence the industry significantly. These specifically revolved around climate change, water scarcity, land availability, soil degradation, population growth and changing lifestyles. The value chain analysis revealed that opportunities exist in the agriculture industry to create horizontal and vertical alliances to strengthen Floppy Sprinkler’s position in the market. Competitive pressures in the market include direct competitors of Floppy Sprinkler, as well as the bargaining power of suppliers and buyers. Threat of new entrants and substitute products are not perceived to be immediate competitive pressures for Floppy Sprinkler owing to its cutting-edge technology, which offers a distinctive competitive advantage. Finally, opportunities were identified, which served as recommendations for Floppy Sprinkler in developing its strategy.

Com a necessidade de se promover o uso eficiente da água na agricultura, aprimoramentos e novos desenvolvimentos em equipamentos de irrigação são sempre bem-vindos. Um sistema de irrigação por gotejamento móvel (IRGMO), trata-se da união entre a irrigação por pivô central (irrigação por aspersão) e a irrigação por gotejamento (irrigação localizada). O sistema é constituído por tubos de descida que unem a linha principal do pivô central (aço zincado) com as linhas gotejadoras (polietileno). A vazão em cada ponto de derivação do pivô é calculada em função da vazão dos gotejadores e do número de emissores por metro linear de mangueira. A área é irrigada através do movimento circular do equipamento no campo, que arrasta sobre o terreno e sobre o dossel das plantas as linhas gotejadoras. As vantagens deste sistema híbrido de irrigação é poder utilizar gotejadores de vazão elevada (2 - 12 litros/ hora), o que reduz o risco de entupimento do sistema, assim como, requerer somente 1 a 2 % da quantidade equivalente de metros lineares de tubogotejadores da irrigação localizada fixa sobre o terreno. Este trabalho teve como objetivo apresentar uma metodologia de cálculo para o dimensionamento deste novo sistema de irrigação por gotejamento móvel, assim como, desenvolver um software livre de dimensionamento deste sistema. O software foi desenvolvido em Visual Basic 2015, utilizando a interface do Microsoft Visual Studio Community 2015 (Windows). A linguagem de programação segue a metodologia baseada em um conjunto de 44 equações, as quais por meio parâmetros fornecidos pelo usuário possibilitam o dimensionamento do sistema. O resultado foi um software leve, capaz de realizar os cálculos necessários rapidamente, apresentando ao final dimensionamento uma janela com resumo do sistema IRGMO e uma tabela contendo as informações para cada linha de derivação. Os resultados podem ser salvos em um arquivo de texto ou podem ser enviados diretamente ao Microsoft Excel, os parâmetros utilizados pelo usuário podem ser salvos também, dessa forma permitindo que um mesmo dimensionamento possa ser feito várias vezes. Além de apresentar o software desenvolvido, este trabalho apresenta também alguns cenários de dimensionamento. / With the need to promote the efficient use of water in agriculture, enhancements, and new developments in irrigation equipments are always welcome. A mobile drip irrigation system (IRGMO), is the union of center-pivot irrigation (sprinkler irrigation) and drip irrigation (localized irrigation). The system consists of lowering pipes connecting the main line of the central pivot (galvanized steel) with driplines (polyethylene). The flow at each point deriving from the pivot is calculated in function of the flow rate drippers and a number of transmitters per linear meter of hose. The area is irrigated through the circular motion of the equipment in the field which drags on the ground and on the canopy of plants driplines. The advantages of this hybrid system of irrigation is the use of high flow drippers (2-12 liters/hour), which reduces the risk of clogging the system, as well as it requires only 1 to 2% of the equivalent amount of linear meters of irrigation driptubes fixed on the ground. This work aimed to introduce a calculation methodology for the sizing of this new mobile drip irrigation system, as well as, to develop a free software system sizing. The software was developed in Visual Basic 2015, using the interface of Microsoft Visual Studio Community 2015 (Windows). The programming language follows the methodology based on a set of 44 equations, which through user-supplied parameters allows the sizing system. The result was a lightweight application, able to perform the necessary calculations quickly, showing the end sizing a window with a summary of the IRGMO system and a table containing the information for each line. The results can be saved in a text file or sent directly to Microsoft Excel, the parameters used by the user can be saved as well, and thus allowing that an even sizing can be done several times. In addition to introducing the application development, this paper presents also some sizing scenarios.

As indústrias de abate animal e processamento de carne geram grandes quantidades de efluentes ricos em nutrientes, que podem ser utilizados na irrigação de pastos como estratégia de reúso de água nas propriedades agrícolas. O objetivo do trabalho foi avaliar os aspectos agronômicos do cultivo do capim-coastcross para produção de feno, pela irrigação por aspersão com efluente de abatedouro tratado por sistema anaeróbio (UASB). O delineamento experimental foi em blocos completos ao acaso, com quatro repetições, com medidas repetidas no tempo. Os cincos tratamentos empregados foram: (i) T1 - irrigação com água superficial e adição de 100% de adubação nitrogenada recomendada (AN); (ii) T2, T3, T4 e T5 - irrigação com efluente tratado de abatedouro e adição de 0, 33%; 66% e 100 % de AN, respectivamente. Sendo a AN 50 kg ha-1 corte-1 de nitrogênio, na forma de ureia. Os dados foram avaliados por meio da produção de massa fresca e massa seca, análise química do solo e da parte aérea, análise bromatológica, determinação do índice de vegetação normalizada (NDVI), uso de imagens termográficas no dossel da cultura, nas estações inverno-primavera (um corte) e verão (três cortes). O efluente após tratamento apresentou alta concentração de nitrogênio total (163±55 mg L-1) e baixo a moderado potencial salino (CE=1,46±0,34 dS m-1). No período inverno-primavera a composição química e a produção do capim-coastcross foram favorecidas pela irrigação com efluente, com economia de 100% da adubação nitrogenada. Ainda, nesta estação, as características químicas do solo foram alteradas pelas águas residuárias, nos teores de matéria orgânica, carbono total, fósforo, sódio e porcentagem de sódio trocável. O estado nutricional da planta forrageira foi adequado para todos os tratamentos e estação do ano. No verão, as lâminas de irrigação com efluente foram reduzidas pela ocorrência das chuvas, com menor aporte de nutrientes. A maior precipitação reduziu os teores de sais no solo. Nesse período a produção da forragem foi menor nos tratamentos irrigados com efluente de abatedouro, com exceção de T5. O acompanhamento da produção da forragem pelo NDVI e pelas imagens termográficas mostraram relação da presença do nitrogênio aplicado pelas diferentes fontes de água. / Slaughterhouses and meat processing industries produce high amounts of effluents, which can be used in forage irrigation as a water reuse strategy in agricultural properties. This work aimed at evaluating the agronomic aspects of the cultivation in coastcross grass to produce hay, by sprinkling irrigation with treated slaughterhouse effluent by anaerobic system (UASB). The experimental design consisted of completely randomized blocks, with four replicates, sub plots in time. The five treatments employed were: (i) T1 - irrigation with potable water plus 100% of recommended nitrogen fertilization (MNF); (ii) T2, T3, T4 and T5 - irrigation with treated slaughterhouse effluent plus 0, 33%; 66% and 100% of MNF, respectively. As MNF 50 kg ha-1 cut-1 nitrogen, as urea. Fresh mass and dry mass production, chemical composition of soil and leaf, normalized difference vegetation index (NDVI) and thermal imaging were determined, for the Winter-Spring (one cut) and summer (three cuts) seasons. The treated effluent showed high concentration of total nitrogen (163 ± 55 mg L-1) and low to moderate degree saline (CE = 1,46 ± 0,34 dS m-1). Winter-spring seasons the quality and production in grass-coastcross were better with effluent, with economy of 100% in nitrogen fertilizer. Still this season, the chemical characteristics of the soil were altered by the wastewater waters, to the contents of organic matter, total carbon, phosphorus, sodium and a percentage of exchangeable sodium. The nutritional status of forage was similar for all treatments and season in year. Summer season the effluent irrigation was smaller by the occurrence of rainfall, with less nutrient intake. The largest precipitation decreased the degree salt in soil. During this period the production was lower to treatments irrigated with effluent, except for T5. The monitoring of the production by the NDVI and the thermal imagining showed a relation with nitrogen applied by the different sources of water.