摘要
点源与非点源污染共存是河流污染的特点,运用污水处理厂的异位修复和以河道空间为处置场所的原位修复相结合的生物技术修复受污染河流,具有重要的理论意义与实用价值。采用强化生物膜-活性污泥复合工艺(EHYBFAS)的异位修复与生物接触氧化工艺的原位修复相结合的生物技术修复受污染河水,取得了较好的效果,对COD、TN和NH4+-N的平均去除率分别为(93.3±1.45)%、(70.0±3.34)%和(71.9±4.43)%,充分体现了该技术占地面积小、处理量大、处理效果好的优点。MPN-Griess检测结果表明,系统中微生物丰富,硝化菌(氨氧化菌和亚硝酸盐氧化菌)在生物膜载体上最高达108 MPN/g干填料,在混合液中最高达105 MPN/mL,保障了系统的脱氮能力。PCR-DGGE和克隆测序检测结果表明,系统中氨氧化菌物种丰富,Nitrosomonas sp. Nm59是其优势种类之一,且是唯一可获得培养的亚硝化单胞菌。
The characteristic of river pollution is the coexistence of point source and non-point source pollution. The combined process of ex-situ bioremediation in WWTP and in-situ bioremediation in river is a practical and feasible method for restoration of polluted river water. The combined process a- dopts the enhanced hybrid submerged biofilm and activated sludge （EHYBFAS） in ex-situ bioremediation and the biological contact oxidation （BCO） in in-situ bioremediation, and the excellent pollutant removal efficiency is achieved in the system. The average removal rates of COD, TN and NHf - N are （93.3 ± 1.45） %, （70.0 ± 3.34） % and （71.9 ± 4.43） % respectively. The technology has advantages of small footprint, large treatment capacity and excellent treatment efficiency. MPN-Griess method shows that in the system, microorganisms are rich and the maximum nitrifying bacteria are about 10^8 MPN/g in biofilm carriers and 105 MPN/mL in mixed liquor, ensuring the nitrogen removal capacity of the system. PCR- DGGE, cloning and sequencing methods reveal that Nitrosomonas sp. Nm59 is one of the dominant species of rich AOB and the only cultured strain.
出处
《中国给水排水》
CAS
CSCD
北大核心
2011年第11期59-62,共4页
China Water & Wastewater
