Papers by Uma Shankar Singh
International Journal of ChemTech Research, 2020
The pulp and paper industries discharge of large amount of effluent as wastewater in the surround... more The pulp and paper industries discharge of large amount of effluent as wastewater in the surrounding streams thereby causing serious health and environmental problems. These large quantities of effluents need to be characterized for evolving proper treatment strategy prior to their disposal. Physicochemical characteristics of effluents from an agro-based paper mills located in Uttarakhand state of India were analyzed in terms of pH, colour, TS, TDS, TSS, turbidity, BOD, COD, and AOX. The effluent samples collected from different processing units of the paper mill varied considerably across the discharge streams. The mean values pH, colour, TS, TDS, TSS, turbidity, BOD, COD, and AOX were found in the range of 2.559.8±0.05, 4102802 PCU, 1980.652785.79 ppm, 1650.672470.35 ppm, 315.44 401.35 ppm, 73.22349.37 NTU, 170.32670.42, 705.522000.55 ppm, and 14.9840.82 respectively. Result shows that all the studied physicochemical parameters of effluents at different processing units o...
International Journal of Engineering and Technical Research, 10(11): 19-26, 2020
Pulp and paper mills generate huge amount of wastewater depending on the type of processes used i... more Pulp and paper mills generate huge amount of wastewater depending on the type of processes used in the plant whose unsafe disposal can be very hazardous to environment and human health. Such wastewater need be treated properly prior to release into environment. In view of the fact there has been substantial research and development worldwide concerning wastewater treatment thereby limiting the discharge of pollutants to receiving environment. The present review covers a variety of wastewater treatment methods and research carried out on removal of various toxic pollutants so as to limit the release of pollutant load. Various treatment processes for pulp and paper industrial effluents, including aerobic, anaerobic, photo-catalysis, electrochemical, ozonation, coagulation-flocculation and adsorption treatment processes have been presented. Though, the conventional wastewater treatment systems widely practiced in pulp and paper industry generally involve primary clarification followed by activated sludge processes. However, supplementary treatments including advanced oxidation processes, biological treatments, membrane filtration, etc. are needed to eliminate higher levels of pollutant. In order to reduce the use of freshwater, recycling and reuse of the properly treated wastewater has been emphasized. Best treatment strategy should be devised considering the type, amount and characteristics of wastewaters. Further, an effective treatment system need to be inexpensive and should integrate a series of physicochemical, biological, and hybrid treatment processes.
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Papers by Uma Shankar Singh