Sewage Sludge： A Sustainable Source for Plant Nutrient

作     者：S.A. Unnisa G.Narasimha Rao P. Seshabala B.V. Prasad 

作者机构：Centre for Environment IST Jawaharlal Nehru Technological University Kukatpally 500085 A.P. India 

出 版 物：《Journal of Environmental Science and Engineering》 (环境科学与工程（英文版）)

年 卷 期：2010年第4卷第2期

页      面：37-39页

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 09[农学] 0903[农学-农业资源与环境] 090302[农学-植物营养学] 

主　　题：Sewage sludge nutrients elementar analyzer heavy metals plants 

摘      要：Sludge production is an avoidable problem arising from the treatment of wastewater. The sludge remained after municipal wastewater treatment contains considerable amounts of various contaminants and if is not properly handled and disposed, it may produce extensive health hazards. On the other hand, this sludge has benefit for plants and soils. Sludge samples were collected over a 12 month period from sewage treatment plants （STP＇s）, i.e, Khairathabad and Meeralam Tank, Hyderabad, India and analyzed for C, H, N, S by elementar analyzer, P, K, Ca, Mg by spectrophotometer and heavy metals like Zn, Pb, Ni, Cu, Cd by atomic absorption spectrophotometer. The sludge contained approximately 50% organic matter and 1-4% inorganic carbon. Organic and inorganic carbon, organic nitrogen, inorganic phosphorous, Ca and Mg were found to be present in sludge at a relatively constant concentration with respect to sampling time. Inorganic N, organic P, K, and all metals were found to be quite variable with time when sludge produced from different STP＇s.