| 石化废水易降解成分对活性污泥耗氧抑制毒性评价的干扰因素 |
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| 引用本文： | 王钦祥,于茵,周岳溪,杨茜,陈学民,伏小勇.石化废水易降解成分对活性污泥耗氧抑制毒性评价的干扰因素[J].环境科学研究,2016,29(1):92-98. |
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| 作者姓名： | 王钦祥 于茵 周岳溪 杨茜 陈学民 伏小勇 |
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| 作者单位： | 1.中国环境科学研究院水污染控制技术研究中心, 北京 100012 ;中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012 ;兰州交通大学环境与市政工程学院, 甘肃 兰州 730070 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2012ZX07201-005) |
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| 摘 要： | 为评价某石化混合废水的毒性,采用活性污泥耗氧速率抑制试验研究不同φ(石化废水)对活性污泥中不同菌群的抑制及其影响因素. 结果表明,所用石化废水对活性污泥中的硝化细菌具有明显毒性,其EC50(半抑制效应浓度,以φ计)为9%左右；同时,该废水对异养菌的耗氧具有较强的促进作用,φ(石化废水)为100%时IH(异养菌耗氧速率抑制率,131%)最高,这种促进作用对RT(总耗氧速率)测定有显著影响(R=0.991,P<0.05),因此,仅以RT评价废水毒性容易造成对废水真实毒性的低估. 5种常见易降解基质(乙酸钠、葡萄糖、甲醇、生活污水、丙酸钠)中,ρ(甲醇)为15 mg/L时对异养菌促进效果显著(P<0.05),促进率达50%以上；而在高浓度条件下,乙酸钠、葡萄糖、甲醇、丙酸钠对异养菌均有显著促进作用(P<0.05),RH(异养菌耗氧速率)最高提高了182%. 研究显示,石化废水中的乙酸盐等易降解成分是活性污泥耗氧速率抑制试验的重要干扰因素.
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| 关 键 词： | 石化废水 耗氧速率 异养菌 硝化细菌 易降解基质 |
| 收稿时间： | 2015/7/26 0:00:00 |
| 修稿时间： | 2015/10/30 0:00:00 |
Interference of Activated Sludge Oxygen Uptake Toxicity Evaluation by Readily Degradable Compositions in Petrochemical Wastewater |
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| WANG Qinxiang,YU Yin,ZHOU Yuexi,YANG Qian,CHEN Xuemin and FU Xiaoyong.Interference of Activated Sludge Oxygen Uptake Toxicity Evaluation by Readily Degradable Compositions in Petrochemical Wastewater[J].Research of Environmental Sciences,2016,29(1):92-98. |
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| Authors: | WANG Qinxiang YU Yin ZHOU Yuexi YANG Qian CHEN Xuemin and FU Xiaoyong |
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| Institution: | Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China,Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China,School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China and School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China |
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| Abstract: | An activated sludge oxygen uptake inhibition test was used to evaluate the toxicity of a petrochemical wastewater after biological treatment. Anomalies were found that oxygen uptake could be inhibited in low concentrations and promoted in high concentrations. The causes of interference were analyzed in this study. The petrochemical wastewater had severe toxicity on the nitrifying bacteria in activated sludge, with its EC50 being about 9%. The oxygen consumption of heterotrophic bacteria was accelerated by the petrochemical wastewater. IH(promoting rate) even reached 131% by 100% wastewater. As the influence of acceleration was greater, total oxygen uptake rate showed a promotion of 47%. Therefore, the total oxygen uptake rate of the whole activated sludge would lead to underestimation of the toxicity. The influence of readily degradable substances on the oxygen consumption by heterotrophic bacteria in activated sludge was also analyzed. Methyl alcohol promoted the rate of 50% at low concentration(15 mg/L) of readily degradable substances, while sodium acetate, glucose, methanol and sodium propionate had the most obvious effects at high concentrations, and the promoting rate was about 182%. The effect of readily degradable substance, such as acetate and propionate, on the RT showed that the readily degradable substance such as acetate in the petrochemical wastewater used in this study was responsible for promoting the heterotrophic oxygen consumption. |
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| Keywords: | petrochemical wastewater oxygen uptake rate heterotrophic bacteria nitrifying bacteria readily degradable substance |
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