The Unified Dynamic Theory and Its Engineering Research |
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Authors: | LI Ang ZHANG Yan-qiu LI Yan DIAO Zhi-jun |
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Affiliation: | 1. Environmental Science and Research Institute of Xuzhou, Xuzhou 221000, China 2. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China |
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Abstract: | The unified dynamic theory reveals the substrate-hased nonlinear growth phenomena.It means that the environment of high organism concentration and low substrate state is useful for the growth of weak floras.With ecological superior nitrification denitrification ( ECOSUNIDE ) technology,high sludge concentration by distributing influent to anaerobic and anoxic zones is carried out,and the ecological superiorities of nitrifiers,denitrifiers,and phosphate accumulating organisms (PAOs) get to be promoted.One of the anaerobic/anoxic/oxic(A/A/O) treatment lines of a sewage treatment plant with ECOSUNIDE technology for further investigation on the nutrient removal efficiency is reformed.The advantages of ECOSUNIDE,such as high efficiency and saving energy,are well demonstrated,even under the condition of low temperature (about 15℃) and carbon-resource (C/N ratio lower than 2.5 ).In ECOSUNIDE system,the effluent indexes as biochemical oxygen demand (BOD),chemical oxygen demand (COD),and NH3-N reach the Class I-A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant ( GB18918-2002 ),and suspended substance ( SS ),total nitrogen( TN),and total phosphorus(TP) meet the Class I -B criteria.While the effluent qualities of A/A/O system only reach the secondary discharge standard.Through the comparison on the sludge character of ECOSUNIDE system with A/A/O,more abundant biofacies,darker and more intense zoogioea,more obvious filamentous bacterium,and clearer floes edges in ECOSUNIDE system are found. |
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Keywords: | nonlinear growth high sludge concentration low substrate state nutrient removal sludge activity |
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