一体化反应器处理生活污水的中试研究

鉴于污水处理中对氮、磷去除率的要求和内循环三相生物流化床反应器存在的不足,开发了一种一体化高效分离生物流化复合反应器(HSBCR)。HSBCR反应器好氧循环流化区采用了独特的分格结构,并且在同一个反应器中实现了好氧、缺氧分区运行。HSBCR中试设备处理生活污水的结果表明,当反应器好氧区HRT为1h时,出水COD质量浓度可以达到《城镇污水处理厂污染物排放标准》(GB18918-2002)的二级标准;当HRT为2h,出水COD质量浓度可以达到一级(B)排放标准。随着HRT从1h延长到2.5h,反应器对NH3-N的去除效果上升;对TN的去除效果表明,反应器具有较好的反硝化效果;反应器生物除磷效果对TP有约50%的去除率。利用HSBCR进行同步化学除磷可以使反应器出水TP低于1.0mg/L;气浮分离使反应器出水SS有效控制在20mg/L以内。

Pilot Study on Domestic Sewage Treatment with Integrated Reactor

As the requirements of rates of phosphorous removal and denitrification in domestic sewage treatment,and there are some shortcomings of inner circulated in three phase biological fluidized bed,a kind of integrated high efficient separation and biological fluidized composite reactor(HSBCR) was developed.The unique cellular structure was used in aerobic fluidized zone of HSBCR,and the aerobic zone and anoxic zone in the same reactor was performing separately.The results of domestic sewage treatment by HSBCR pilot equipment was shown,when HRT(hydraulic remain time) of aerobic zone is 1.0hr,effluent COD can reach to the second level standard of "discharge standard of pollutants for municipal wastewater treatment plant"(GB18918-2002).When HRT is 2.0hr,effluent COD can reach to the first level(B) standards.When HRT is increased from 1.0hr to 2.5hr,NH3-N removal ratio will be increased.The results of reactor removal TN(total nitrogen) indicate that HSBCR has better denitrifying effect.Biological phosphorus removal result is 50% in HSBCR,and when chemical phosphorus removal method is added in HSBCR at the same time,effluent TP concentration is less than 1.0mg/L.Effluent SS concentration is less than 20mg/L by air floatation separation in HSBCR.