Spelling suggestions: "subject:"water, purification"" "subject:"water, urification""
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A bench-scale examination of the effect of static mixers on the disinfection of cryptosporidium parvumHeindel, Heather Lee 12 1900 (has links)
No description available.
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Treatment of phenol with two-stage anaerobic filter processesCheng, Sheng-Shung 12 1900 (has links)
No description available.
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Some chemical aspects of rapid sand filtrationCrapps, David Kenneth 08 1900 (has links)
No description available.
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Chemical oxidation of aquatic antibiotic microcontaminants by free and combined chlorineDodd, Michael 05 1900 (has links)
No description available.
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Filtration and backwashing performance of biologically-active filtersAhmad, Rasheed 05 1900 (has links)
No description available.
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Treatment of turbid surface water for small community suppliesPardon Ojeda, Mauricio January 1989 (has links)
No description available.
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Evaluation of physiochemical qualities and heavy metal levels of the final effluents of some wastewater treatment facilities in the Eastern Cape Province of South AfricaKulati, Thanduxolo Cullinan January 2016 (has links)
Water is the most abundant substance in nature and vital for life activities. The major water sources for use are surface water bodies such as rivers and lakes, and underground aquifers and pore spaces down the water table (Ring, 2003). Water derived from these sources is not necessarily pure since it contains dissolved inorganic and organic substances, living organisms (viruses, bacteria, etc). For these reasons, water intended for domestic uses should be free from toxic substances and microorganisms that are of health significance (WHO, 2005). The availability and quality of water always have played an important role in determining the quality of life. Water quality is closely linked to water use and to the state of economic development (Chennakrishnan et al., 2008). Ground and surface waters can be contaminated by several sources. In urban areas, the careless disposal of industrial effluents and other wastes may contribute greatly to the poor quality of water (Mathuthu et al., 1997). In most developing countries, most areas are located on the watersheds which are the end points of effluents discharged from various industries (Oberholster and Ashton, 2008). South Africa, as a developing country, is experiencing rapid demographic changes due to urbanization, industrialization and population growth. The country has also been identified as being water-scarce, which can lead to a challenge of meeting the increasing water demand due to industrialization and urbanization. Such population growth increase may result in an increase in wastewater output, especially around urban areas.
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Modelling and optimal control of countercurrent ion exchange processDube, Nthuthuko Marcus January 2002 (has links)
Thesis (MTech (Electrical Engineering))--Peninsula Technikon, Cape Town, 2002 / The problem for wastewater treatment is very important these days because of population
increase and industry development. Ion exchange technology has proved its positive
qualities in domestic lives and industry, but the ion exchange process still needs deeper
understanding and improving. That is why a new pilot plant has been built in Chemical
Engineering Department at Peninsula Technikon.
In addition to the treatment of domestic effluents there are other processes which the ion
exchange is suited for, such as the recovery and the reuse of industrial effluents. The
proposed control system is developed in such a way that it does not have to depend on a
certain effluent.
The selection of the process and the development of techniques for its control fall into the
national needs of improving people's lives (e.g. giving them excess to clean water) and
quality of the environmental conditions (treatment of toxic waste substances).
There is a need for an application area for modeling and control methods developed in
the field of control engineering for the Department of Electrical Engineering; on the other
hand a need of control techniques for the development in the Department of Chemical
Engineering technological process. This multidisciplinary liaison between the two
Engineering departments promotes joint research activities and relevance between them.
It also equips the graduating engineer with the relevant experience into working in a team
of multidisciplinary engineering fields.Community and industrial relevance of the research study is that in addition to treatment
of domestic effluents, the ion exchange process is also particularly well suited for: the
desalination of hard waters, combined neutralization and desalination of alcohol
effluents, such as mine drainage, acid mineral tailings, paper bleach affluent. the
pretreatment of reverse osmosis feed for the removal of organic and colloidal particulate.
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Investigation of process parameters and development of a mathematical model for the purposes of control design and implementation for a wastewater treatment processDu Plessis, Sydney Charles January 2009 (has links)
Thesis (DTech (Electrical Engineering))--Cape Peninsula University of Technology, 2009 / The problem for effective and optimal control of wastewater treabnent plants is very
important recently because of the increased requirements to the qualitY of the effluent
The activated sludge process is a type of wastewater process characterized with
complex dynamics and because of this proper control design and implementation
strategies are necessary and important for its operation. Since the early seventies, when
a major leap forward was made by the widespread introduction of dissolved oxygen
control, little progress has been made.
The most critical phase in the solution of any control problem is the modelling stage. The
primary building block of any modem control exercise is to construct and identify a
model for the system to be controlled. The existing full Activated Sludge Model 1
(ASM1) and especially University of Cape Town (UCT) models of the biological
processes in the activated sludge process, called in the thesis biological models, are
highly complex because they are characterised with a lot of variables that are difficult to
be measured on-line, complex dependencies and nonlinear interconnections between
the biological variables, many kinetic parameters that are difficult to be determined, .
different time scales for the process dynamics.
The project considers reduction of the impact of the complexity of the process model
over the methods for control design and proposes a solution to the above difficulties by
development of a reduced model with small number of variables, but still with the same
characteristics as the original full model for the purposes of real time.
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The removal of impurities from a process streamHimmelstutzer, EA January 2002 (has links)
Thesis (MTech (Chemical Engineering))--Cape Technikon, 2002. / The high purity 1-octene produced by Sasol Alpha Olefins in Secunda and
which is sold to DOW Chemical Company for co-monomer application, has
performed poorly over the DOW Ziegler-Natta catalysts. The reason for the
poor performance was catalyst poisoning caused by low-level impurities
present in the 1-octene. Much work from Sasol and DOW has gone into
identifying the components responsible for catalyst deactivation, as well as
methods suitable for removing them without significant 1-octene losses.
Super NMP (n-Methyl-2-Pyrrolidone) extractive distillation piloting was
performed previously on 1-octene in order to remove the low-level impurities
that deactivate the DOW catalysts.
VLE (vapour liquid equilibrium) test work performed previously indicated that
all xylenol isomers are more promising as extractive distillation solvents than
NMP.
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