盐度对活性污泥去除NH_3-N及COD的影响研究
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摘要
利用序批式活性污泥法反应器对活性污泥进行盐度梯度驯化培养,研究不同盐度条件下活性污泥的处理效果。结果表明,实验过程中COD去除率保持在95%以上。氨氮去除率在盐度小于12 g/L的条件下经过驯化能够稳定80%左右,盐度为6 g/L时氨氮去除率最大达到89.99%;当盐度超过12 g/L时,系统对氨氮的去除受到明显抑制,氨氮去除率在盐度为18 g/L时仅为42.46%。盐度对氨氮去除率的影响较COD去除率的影响更大。经过50余天的培养,污泥的MLSS的质量浓度从3.12 g/L增大到了5.43 g/L,污泥容积指数从90.06 m L/g下降至38.31 m L/g,污泥沉降性能变好。
The SBR(sequencing batch reactor) was used to acclimate the activated sludge by salinity gradient acclimation to study the treatment effect of activated sludge under different salinity conditions. The results showed that the removal rate of COD was over 95% during the whole experiment. The removal rate of ammonia nitrogen was about 80% when the salinity was less than 12 g/L, and the maximum removal rate of ammonia nitrogen reached89.99% when the salinity was 6 g/L. When the salinity exceeds 12 g/L, the removal rate of ammonia nitrogen in the system was obviously inhibited, and the removal rate of ammonia nitrogen was only 42.46% when the salinity was 18 g/L. The effect of salinity on ammonia-nitrogen removal rate was greater than that of COD. After more than 50 days of foster, the mass concentration of MLSS of sludge increased from 3.12 g/L to 5.43 g/L and SVI increased from 90.06 mL/g to 38.31 mL/g, and sludge sedimentation increased.
The SBR(sequencing batch reactor) was used to acclimate the activated sludge by salinity gradient acclimation to study the treatment effect of activated sludge under different salinity conditions. The results showed that the removal rate of COD was over 95% during the whole experiment. The removal rate of ammonia nitrogen was about 80% when the salinity was less than 12 g/L, and the maximum removal rate of ammonia nitrogen reached89.99% when the salinity was 6 g/L. When the salinity exceeds 12 g/L, the removal rate of ammonia nitrogen in the system was obviously inhibited, and the removal rate of ammonia nitrogen was only 42.46% when the salinity was 18 g/L. The effect of salinity on ammonia-nitrogen removal rate was greater than that of COD. After more than 50 days of foster, the mass concentration of MLSS of sludge increased from 3.12 g/L to 5.43 g/L and SVI increased from 90.06 mL/g to 38.31 mL/g, and sludge sedimentation increased.
引文
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[12]周贵忠,许硕,姚倩,等.不同盐度下活性污泥中微生物群落变化规律及其处理模拟染料废水[J].环境科学,2017,38(7):2972-2977.
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[15]蔡涛.好氧颗粒污泥生物脱氮除磷对盐度的响应[J].工业安全与环保,2018(6):50-52.
[2]武桂芝,武周虎,张国辉,等.海水冲厕的应用现状及发展前景[J].青岛理工大学学报,2002,23(3):49-52.
[3]寇希元,张雨山,王静.海水冲厕技术研究与应用进展[J].海岸工程,2009,28(2):83-89.
[4]王静,张雨山.海水盐度对完全混合活性污泥法氨氮去除率的影响研究[J].工业水处理,2000,20(4):18-19.
[5]王基成,王建娜,潘成峰,等.驯化耐盐活性污泥处理高盐度工业废水[J].中国给水排水,2007,23(19):83-86.
[6]王洪娟,于德爽,马静.SBR工艺处理高含盐生活污水的研究[J].环境科学与管理,2006,31(2):101-103.
[7]污水综合排放标准:GB 8978-1996
[8]赵凯峰,王淑莹,叶柳,等.Na Cl盐度对耐盐活性污泥沉降性能及脱氮的影响[J].环境工程学报,2010,4(3):570-574.
[9]国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[10]崔有为,王淑莹,宋学起,等.Na Cl盐度对活性污泥处理系统的影响[J].环境工程,2004,22(1):19-21.
[11]冯叶成,占新民,文湘华,等.活性污泥处理系统耐含盐废水冲击负荷性能[J].环境科学,2000,21(1):106-108.
[12]周贵忠,许硕,姚倩,等.不同盐度下活性污泥中微生物群落变化规律及其处理模拟染料废水[J].环境科学,2017,38(7):2972-2977.
[13]宋晶.高盐废水的生物法处理研究[D].大连:大连工业大学,2010.
[14]陈晓光,王硕,王燕,等.好氧颗粒污泥处理含盐生活污水的特性[J].中国给水排水,2014,40(5):15-19.
[15]蔡涛.好氧颗粒污泥生物脱氮除磷对盐度的响应[J].工业安全与环保,2018(6):50-52.