氧化沟系统的生物泡沫现象及生物性能初步研究  

Study on Biological Foams and Their Performance in Oxidation Ditch

作　　者：游佳 张向阳 郑兴灿 吴金香 

机构地区：[1]国家城市给水排水工程技术研究中心,天津300191 [2]唐山市曹妃甸工业区钢铁电力园区管委会,河北唐山063210

出　　处：《中国给水排水》2013年第21期93-96,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07313-001-04)

摘　　要：对某污水处理厂脱氮除磷氧化沟系统中经常出现的泡沫现象进行了初步分析和研究。结果显示,该污水处理厂出现的生物泡沫为丝状菌(Microthrix parvicella)在低温条件下引发的污泥膨胀所致,由气泡、丝状菌和污泥颗粒构成较为稳定的生物泡沫体系。对生物泡沫的生物性能研究发现,泡沫具有良好的生物活性,除了丝状菌以外,还具有大量的硝化菌和反硝化菌,其耗氧速率为4.79 mgO2/(gVSS·h),硝化和反硝化能力分别达到2.53 mgNO-3-N/(gVSS·h)[即2.49mgNH3-N/(gVSS·h)]、0.45 mgNO-3-N/(gVSS·h)。对于春夏季节交变引起的生物泡沫,可将其破碎后再返回至系统中,一般不会影响活性污泥的性能,同时也不会造成生物量的流失,但会影响生物池的感观。Biological foams occurred in the oxidation ditch at a WWTP were analyzed and studied. The results indicated that the biological foams were caused by Microthrix parvicella and the related sludge bulking at low temperature. A steady foam system was consisted of air bubbles, filamentous bacteria and sludge particles. The biological foams showed high biological activity, in which there were many nitrifying and denitrifying bacteria except for filamentous bacteria. The oxygen uptake rate, nitrification rate and denitrification rate of the biological foams were 4.79 mgO2/（gVSS·h）, 2.53 mgNO^-_3 -N/（gVSS·h） [2.49 mgNH3 - N/（gVSS·h） 1 and 0.45 mgNO^-_3- N/（ gVSS·h） respectively. The biological foams caused by seasonal change from spring to summer could be broken and recycled, which did not affect the performance of activated sludge, did not cause loss of biomass, but affected the appearance of biological tank.

关 键 词：氧化沟 生物泡沫 硝化 反硝化 污泥膨胀 生物活性 

分 类 号：X703[环境科学与工程—环境工程]