外文翻译---DE型氧化沟生物脱氮除磷工艺.docx

外文资料DE-oxidation ditch biological nitrogenand phosphorus removal process1、DE-oxidation ditch biological nitrogen removal process Nitrogen is a plant growth essential nutrients, but if the chlorine content in water too high, it will produce eutrophication so that the dissolved oxygen content to reduce, the proliferation of algae growth, accelerate the aging process of natural water bodies. In addition to the nitrate form of chlorine is considered a cause of infant leukemia temporary high-speed railway on January 1 of the root causes of hemoglobin. Therefore, drinking water sources will Liuren the oxidation ditch water is necessary dechlorination. Oxidation Ditch biological nitrogen removal is the first by the self-support of aerobic microbes in the aerobic state, the use of dissolved oxygen in the mixture through nitrification will be for the effect of nitrate oxide, and then from heterotrophic microorganisms in the state in the anti-anoxia The role of nitrifying bacteria, the use of nitrates in the role nitrification oxygen to produce anti-nitrate nitrogen into the release of chlorine out. Nitrification-as：Denitrification-as：DE-oxidation ditch the dechlorination role through a special operation mode, in turn create two Gounei nitrification and nitrification conditions. Nitrogen and purpose of reach.Operation to the following four stages of operation (Figure 1). Stage A: Well distribution of the sewage ditch into the Ditch I, interim ditch running low brush, only to maintain the activated sludge mixture of suspended state; dissolved oxygen concentration of less than 0.5 mg/l, in a state of hypoxia, so that the former An aerobic phase of the nitrate to raw sewage as carbon source for denitrification.At this point, I ditch behind the overflow weir open, muddy mixture into this two-person pool for precipitation separation, and in the ditch II to the high-speed brush aeration, into one of the previous phase of the sewage in Amoy good Oxygen state (D0 2mg/l) for nit