By R D Tyagi
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Extra resources for Sustainable sludge management : production of value added products
CHAPTER 3 Value Added Products from Wastewater Sludge: A Road to Sustainability Satinder K. Brar, M. D. Y. 1 Introduction The increase in urban population has caused production of large volumes of wastewater. asp). The larger the city, the larger the figure; this is because average volume includes wastewater released by industry and businesses, which are more numerous in larger cities. 1% of the pollutants in municipal sewage (Metcalf and Eddy, 2003). Organic matter accounts for close to 70% of these pollutants, and inorganic matter 30%.
In most of the cases the improvements were proportional to the application rates of the compost, and they were greater in the loamy soil than in the clayey soil. Many other studies, which have been conducted on the composting of sewage sludge either singly or in combination with solid waste or manure, resulted in a balanced enhancement of soil biological activity after the application of organic residues and, at times, resulted in bioremediation of xenobiotics and the suppression of the disease symptoms caused by a series of plant pathogens such as Pythium sp.
2002). " Water Research, 36(3), 539– 550. , and Nakamura, K. (2003). "Gemmatimonas aurantiaca gen. , sp. , a Gramnegative, aerobic, polyphosphateaccumulating micro-organism, the first cultured representative of the new bacterial phylum Gemmatimonadetes phyl. " International Journal of Systematic and Evolutionary Microbiology, 53, 1155– 1163. , and Wang, W. (2007). " Bioresource Technology, 98(1), 207–210. P. (2005). , 40, 645–650. CHAPTER 3 Value Added Products from Wastewater Sludge: A Road to Sustainability Satinder K.
Sustainable sludge management : production of value added products by R D Tyagi