Practice of High Concentration Sludge for Efficient Nutrient Removal from Municipal Sewage |
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| Authors: | LI Ang ZHANG Yan-qiu LI Yan |
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| Institution: | [1]School of Environment Science and Spatial Informatics , China University of Mining and Technology, Xuzhou 221116, China [2]Jiangsu Key Laboratory of Resources and Environmental Information Engineering, China University of Mining and Technology,Xuzhou 221116, China |
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| Abstract: | ECOSUNIDE is a new activated sludge process based on the sludge concentration optimization theory.With it,we carried out a high sludge concentration by changing influent mode and distributing carbon source in a reasonable way,which can improve the ecological superiority of nitrification and denitrification for the growth of phosphorous accumulating organisms(PAOs)and nitrifiers and raised the nutrient removal efficiency of municipal sewage treatment plants.In 2007,we adopted this technique in Linyi Sewage Treatment Plant in Shandong Province,China.After the reconstruction,we achieved the high efficiency of nutrient removal with low investment under the dynamic load of the secondary sewage treatment plant.The effluent water qualities meet the class I-A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002)and the rest effluent indexes meet the class I-B criteria.Besides, we have above 20% operating cost cut by stopping the internal reflux without power charge increased and any new pool structures built. |
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| Keywords: | ECOSUNIDE sludge concentration optimization high sludge concentration nutrient removal |
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