低温下ZCS工艺和改进式ZCS工艺脱氮效率研究及微生物特性分析

考察冬季低温下沸石联合生物吸附再生工艺和改进式沸石联合生物吸附再生工艺对城市污水的脱氮效率,结果表明在HRT为3.5 h下,ZCS工艺出水氨氮为11.65 mg/L,总氮高于20 mg/L.而相同条件下MZCS工艺氨氮出水为5.45 mg/L,总氮去除率比原ZCS工艺提高了11%,均值为16.8 mg/L.通过聚合酶链式技术,变性梯度凝胶电泳和电镜扫描技术发现两工艺微生物多样性、丰度高于传统活性污泥法,兼具活性污泥法和生物膜法的微生物特性.

Research on nitrogen removal efficiency and microbial characteristics of ZCS and MZCS process at low temperatures

Two sets of zeolite coupled contact-stabilization activated sludge process (ZCS) and modified zeolite coupled contact-stabilization activated sludge(MZCS) were tested to assess nitrogen removal efficiency in winter.The results indicated that the effluent ammonium concentration of ZCS process was 11.65 mg/L,but the total nitrogen concentration was more than 20 mg/L with HRT =3.5 h. Meanwhile,under the same condition,the ammonium concentration in effluent of MZCS process was 5.45 mg/L and removal efficiency of total nitrogen was enhanced 11% for ZCS process.The average value of TN was 16.8 mg/L.It was discovered that the two processes have both microbial characteristics of suspended activated sludge process and biofilm process by using PCR-DGGE and electron microscope scanning technology,and the microbial diversity and richness of the two processes are higher than traditional activated sludge process.