Research on the effects of In-situ biological Technology on water quality Improvement for urban decapitated river
原位生物处理技术改善城市断头河水质研究

Over the water network, creek many areas, there are a lot of breakage rivers, cecum rivers. Because there was no water supply, most of them were eutrophied waters for its long-stay, loss of function of the ecological environment and landscape. The aim of the project is to solve the problems of water quality management attached to urban cecum rivers, by the application of in-situ biological treatment technology, such as artificial floating-island ,re-aeration and the stuffing material for biofilm treatment .It indicated that ,in-situ biological treatment of had significant effect on the purification of urban river eutrophication and got stable engineering operation. The COD removal efficiency was on the scope of 35%-56%,and 45% on average. the average NH3-N removal rate was 33%, ranged from 17%-44%.the TN removal efficiency ranged from 15% to 39% , 28% on average; the removal rate of TP ranged from 25% to 44% , and 35% on average. Summed up: