交替式厌/缺氧-好氧双膜反硝化除磷工艺

doi:10.16085/j.issn.1000-6613.2016.03.042

摘要/Abstract

摘要： 采用某污水处理厂A²/O工艺中的活性污泥为种泥,以模拟生活污水为对象,考察了交替式厌/缺氧-好氧双膜反硝化除磷工艺的启动与运行特性,并采用高通量测试技术分析系统除磷污泥的菌群结构。通过60天的启动试验,系统内反硝化聚磷菌占聚磷菌总数的比例由21.3%提高到94.4%,出水磷在0.6mg/L左右。通过逐步增加进水氨氮的方法运行2个月,系统的脱氮除磷效果稳定。在进水P浓度为6.4mg/L,保持进水N/P比为8.8,交替厌/缺氧-好氧双膜反硝化除磷工艺效能最优,可达0.12kgN/(m³?d)和0.018kgP/(m³?d),出水总磷(TP)0.8mg/L,总氮(TN)12mg/L,出水COD、NH₃-N和TN达到国家综合排放标准GB18918-2002一级A排放标准。周期试验中,pH值、氧化还原电位(oxidation-reduction potential,ORP值)均可作为厌氧释磷的控制参数,ORP也可指示缺氧吸磷的终点。典型周期内硝酸盐、亚硝酸盐的消耗量与磷的吸收量基本呈线性关系。系统内污泥多样性约为种泥的0.5倍,在“门”、“属”分类级别上分别以Proteobacteria、Xanthomonadales-nobank为主。

关键词: 反硝化除磷, 交替式厌/缺氧-好氧双膜工艺, 运行性能, 过程特性, 菌群结构

Abstract: The enrichment of denitrifying phosphorus bacterium(DPB)inoculated activated sludge from the anaerobic tank of a wastewater treatment plant which using A²/O process. Using the simulated domestic wastewater,the performance of the alternate anaerobic/anoxic-aerobic double membrane denitrifying phosphorus removing process(A₂N-DMBR)were investigated and the microflora of the system were investigated by high-throughput sequencing analysis. The results showed that the ratio of DPB to Phosphorus Accumulating Organisms(PAOs)was improved from 21.3% to 94.4% during the whole experiment period of 60 days,and the total phosphorus concentration of effluent was about 0.6mg/L. The A₂N-DMBR process was begun by increasing the influent ammonia nitrogen concentrations gradually,the system attained stable effect of removing nitrogen and phosphorus simultaneously in two months,the total phosphorus concentration of influent was 6.4mg/L,the influent N/P ratio was 8.8,the alternate anaerobic/anoxic-aerobic double membrane denitrifying phosphorus removing process could achieved the efficiency of 0.12kgN/(m³?d) and 0.018kgP/(m³?d). Total phosphorus and nitrogen effluent were 0.8mg/L and 12mg/L,respectively. The COD,NH₄⁺-N and TN met the first grade A standards of GB 18918-2002. Periodical test showed that pH and oxidation- reduction potential(ORP) could be used as the control parameters for phosphate release,ORP could be used to indicate the end point of the phosphate uptake in anoxic phase. There was a linear relationship between phosphorus uptake and nitrate,nitrite consumption during the typical cycle. The feeding sludge of system exhibited 0.5 times bacterial diversity of the seed sludge. At the phylum level,Proteobacteria was dominated in the feeding sludge. At the genus level,Xanthomonadales- nobank that most phosphorus removal bacteria belonged to was the most dominant order for the seeding sludge.

Key words: denitrifying phosphorus removal, alternate anaerobic/anoxic-aerobic double membrane process (A₂N-DMBR), operation characteristic, process analysis, community structure

中图分类号:

X703.1

储建松, 张传义, 吴启威, 何士龙, 毛缜, 孙东旭, 袁丽梅. 交替式厌/缺氧-好氧双膜反硝化除磷工艺[J]. 化工进展, 2016, 35(03): 935-943.

CHU Jiansong, ZHANG Chuanyi, WU Qiwei, HE Shilong, MAO Zhen, SUN Dongxu, YUAN Limei. Alternate anaerobic/anoxic-aerobic double membrane denitrifying phosphorus removing process[J]. Chemical Industry and Engineering Progree, 2016, 35(03): 935-943.

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