No description available.

Woolgathering aims to speculate around ways to reduce the wasteof wool and how wool can catalyze the regeneration of ruralvillages in the north of Sweden. In Sweden today, we producearound 1000 metric tons of wool per year, yet only about half of it isused. This is due to its varied quality and a lack of political support,economic incentive and a low demand on global and nationalmarkets causing a loss of knowledge in wool management andfailing value chains. Modern monocultural agriculture has phasedout traditional sheep breeds and vital semi-natural pastures whichhas had detrimental effects on biodiversity, cultural heritage andland ownership. Björkå, a rural village Västernorrland, has had adwindling population and is in need of regeneration in order toalleviate symptoms of rural neglect. Inspired by the architecutralaccpuncture employed in Songyang and the Brown sugar factoryin Xing village as well as the cooperative management of thefarms in Marinaleda, and a visits to Björkå and one of the manylocal sheep farms, I identified wool as a potential catalyst forthis development along with a series of devices to be employedin a rural regeneration strategy: rural-urban links, tourism, localeconomy, cultural heritage, industry and nature. The woolgathering strategy, like the darning of woolensocks, introduces these devices along with local and regionalactors as threads that feed into the fabric of Björkå aiming torestore its integrity. There is a focus on locally controlled industrywhere economical profits feed back into the community but alsoon collaboration between local and national wool actors. Thecentral core of the strategy merges the 6 devices with the 5 actors. The different threads and wool programmes merge andform new associations, or become integrated into new (virtualand physical) networks that expand well beyond the rural locality. With wool as the catalyst, the strategy can start to mend thegaps in the territory, reconnecting links to endogenous networkswithin the wool industry and exogenous networks between actorsand create economic viability for sheep farmers locally and across Norrland.

Šiame darbe buvo atlikta gyvūninės kilmės atliekų utilizavimo proceso analizė. Pagrindinis uždavinys- rasti būdą prognozuoti utilizavimo proceso pabaigą ir tuo sumažinti energijos suvartojimą. Naudojausi laiko eilučių prognozavimo modeliu. Aprašiau savo metodą pasikeitimo taškui rasti. Taip pat buvo panaudota tiesinė regresija. Galimybė prognozuoti pasikeitimo tašką leistų žymiai sumažinti utilizavimo proceso savikainą. / I this work, an analysis of animal waste utilization process was performed. The main task was to find a way to predict the end of the desiccation process, because possibility to predict this end point may reduce energy consumption. I used the time series forcasting model and proposed method for the change point detection. Linear regression was also used for this task.

Diss. Uppsala : Sveriges lantbruksuniv., 2006.

Diss. (sammanfattning) Karlstad : Karlstads universitet, 2009. / Härtill 5 uppsatser.

Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv. / Härtill 4 uppsatser.

Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv. / Härtill 4 uppsatser.

Nuotekų dumble esančių sunkiųjų metalų neigiamą poveikį aplinkai bei žmogaus sveikatai galima sumažinti apribojant metalų judrumą aplinkoje. Magistro darbe tiriamas sunkiųjų metalų judrumas ir jų immobilizacija fosfogipsu nuotekų dumble bei jo mišiniuose su dirvožemiu. Šiuo tyrimu siekiama išplėsti Lietuvoje dideliais kiekiais susidarančių ir sunkiai pritaikymą randančių atliekų – vandenvalos nuotekų dumblo ir trąšų gamybos metu susidarančio atliekinio fosfogipso utilizavimo galimybes, panaudojant jas žemės ūkyje kaip dirvožemio kokybę gerinančius priedus. Darbo objektas – anaerobiškai apdorotas vandenvalos nuotekų dumblas ir fosfatinių trąšų gamybos metu susidarančios mineralinės atliekos – fosfogipsas. Darbo tikslas – ištirti ir įvertinti atliekiniame fosfogipse esančių fosfatinių priemaišų poveikį sunkiųjų metalų bei augalų maisto elementų judrumui nuotekų dumble ir jo mišiniuose su dirvožemiu bei šarminėmis medžiagomis, taip pat pasiūlyti sunkiųjų metalų stabilizavimo dirvožemyje priemones. Darbo metodai. Tyrimams paruoštas nuotekų dumblo mišinys su molingu natūraliu dirvožemiu (masės santykis 1:1) bei cemento dulkėmis (8:2). Sunkiųjų metalų bei augalų maisto elementų judrumas vertintas ekstrahuojant mišinius, turinčius 5, 10, 20 ir 40% fosfogipso, 0,01M CaCl2 tirpalu. Mišinių pH ir elektrinis laidumas, tirpus Ca2+, K+, ir NO3 kiekis išmatuotas jonometrinu metodu. Tirpus fosforo (PO43-) kiekis nustatytas kolorimetriškai. Sunkiųjų metalų koncentracija tirpale matuota... [toliau žr. visą tekstą] / Negative impact of heavy metals originating from sewage sludge on the environment and human health can be minimised by limiting their mobility in soil. In this study heavy metal immobilisation using pshosphogypsum in sewage sludge and its mixtures with soil have been investigated. This research seeks to broaden utilisation posibilities of two types of waste products – wastewater sewage sludge and by-product of phosphate fertiliser production– phosphogypsum, using them in agriculture as soil amendments. The object of the study – waste of organic origin - anaerobically processed wastewater sewage sludge and mineral by-product of phosphate fertiliser production – waste phosphogypsum. The aim of the study – to investigate and evaluate impact of waste phosphogypsum on the mobility of heavy metals and plant nutrients in sewage sludge and its mixtures with soil and alkaline materials as well as to suggest effective measures for heavy metal stabilisation in soil environment. The methods: for the assessment of metal and nutrient mobility sewage sludge mixtures with soil (mass ratio 1:1) and cement kiln dust (8:2) have been prepared. Heavy metal and macroelement bioavailability has been evaluated by carrying out extraction of different mixtures with 5, 10, 20 and 40% phosphogypsum additive using 0.01M CaCl2 solution. Electric conductivity, pH and water soluble Ca2+, K+ and NO3 concentration has been measured in extracts using ionometric method. Water soluble phosphorus have been... [to full text]

No description available.

Este estudio tiene como objetivo evaluar cual es el comportamiento físico mecánico en unidades de tierra reforzadas con residuos naturales como las fibras de pseudotallo de Musa Paradisiaca con valores de 0.5%, 3.5% y 7% en relación con el peso de cada unidad y mucílago de café al 25% en sustitución del agua. Dándole así una nueva oportunidad de aprovechamiento a los residuos mencionados. Los resultados indican un significativo aumento en la resistencia a la compresión y tracción mejorando hasta un 237% y 135% en unidades respectivamente, y 27.98% y 9% en muretes, en el ensayo de absorción se verificó que las muestras reforzadas absorben agua presentando menos desintegración que las muestras patrón. Se determinó que el porcentaje óptimo de adición es de 0.5% de fibra y 25% de mucilago para evaluar los ensayos de resistencia en muretes a compresión, tracción diagonal e inundación simulada. Se ha concluido que la incorporación de residuos naturales, como fibra de pseudotallo de Musa Paradisiaca y mucílago de café, en unidades de adobe permite mejorar sus propiedades mecánicas con un ligero incremento económico. Además, el uso de fibras y mucílagos en la construcción contribuye a reducir el impacto ambiental, lo que la convierte en una opción viable para abordar los problemas habitacionales en zonas con recursos limitados. / This study aims to evaluate the physical-mechanical behavior in soil units reinforced with natural waste such as Musa Paradisiaca Pseudostem fibers with values of 0.5%, 3.5%, and 7% in relation to the weight of each unit and mucilage of 25% coffee as a replacement of water. Thus, giving a new opportunity to use the waste as mentioned above. The results indicate a significant increase in compressive and tensile strength, improving up to 237% and 135% in units respectively, and 27.98% and 9% in walls. In the absorption test, it was verified that the reinforced samples absorb water, presenting less disintegration. than the standard samples. It was determined that the optimal addition percentage is 0.5% fiber and 25% mucilage to evaluate the resistance of walls in compression, diagonal traction, and simulated flooding. It has been concluded that incorporating natural waste, such as Musa Paradisiaca pseudostem fiber and coffee mucilage, in adobe units allows their mechanical properties to be improved with a slight economic increase. Additionally, using fibers and mucilage in construction contributes to reducing environmental impact, making this a viable option to address housing problems in areas with limited resources.