中文关键词苯酚强化生物除磷工艺(EBPR)除磷性能污泥膨胀 英文关键词phenolenhanced biological phosphorus removal(EBPR)phosphorus removal performancesludge bulking

作者	单位	E-mail
马娟	兰州交通大学环境与市政工程学院, 兰州 730070 甘肃省污水处理行业技术中心, 兰州 730070	meggyma@163.com
王谨	兰州交通大学环境与市政工程学院, 兰州 730070
俞小军	兰州交通大学环境与市政工程学院, 兰州 730070
周猛	兰州交通大学环境与市政工程学院, 兰州 730070
李光银	兰州交通大学环境与市政工程学院, 兰州 730070
孙洪伟	兰州交通大学环境与市政工程学院, 兰州 730070 甘肃省污水处理行业技术中心, 兰州 730070

中文摘要 采用SBR反应器考察了投加不同浓度苯酚（5、10、30、50、100、150、200 mg·L^-1）对强化生物除磷工艺（EBPR）系统除磷性能的影响.结果表明，苯酚浓度≤ 50 mg·L^-1时，COD及PO₄^3--P的去除率均在85%以上，系统具有较好的污染物去除性能；而投加高浓度苯酚（≥ 100 mg·L^-1），反应器除磷性能大幅降低；当苯酚浓度为200 mg·L^-1时，系统仅经过22个周期便丧失除磷性能，COD平均去除率降至61.3%，且在短期内难以恢复.同时发现，长期投加苯酚导致EBPR系统污泥除磷性能受到抑制，且对好氧吸磷的抑制作用大于厌氧释磷.此外，低浓度苯酚条件下（≤ 50 mg·L^-1），因污泥对苯酚毒性逐渐适应，系统污泥微膨胀现象逐渐消失，而由高浓度苯酚引发的污泥膨胀却难以恢复.短期冲击实验表明，由投加苯酚导致的出水COD和磷浓度的波动可随着苯酚撤去而逐渐恢复，由此可知，苯酚冲击对系统除磷性能的抑制可逆. 英文摘要 An SBR reactor was operated to study the inhibitory effect of different concentrations of phenol (5, 10, 30, 50, 100, 150, and 200 mg·L^-1) on the phosphorus removal performance of an EBPR system. The results showed that when the phenol concentration was no higher than 50 mg·L^-1, the removal efficiencies of COD and PO₄^3--P were above 85%. The system showed efficient pollutant removal performance. However, when phenol was higher than 100 mg·L^-1, phosphorus removal performance of the reactor decreased drastically. When phenol concentration was 200 mg·L^-1, the system lost phosphorus removal performance after only 22 cycles. The average COD removal efficiency dropped to 61.3%, and high removal performance recovery was not observed in the short term. Meanwhile, it was found that long-term dosing of phenol inhibited phosphorus removal of the sludge subjected to EBPR. Furthermore, the inhibition on aerobic phosphate uptake was greater than that on anaerobic phosphate release. In addition, the limited sludge bulking disappeared gradually owing to acclimation of the sludge to toxicity with a low phenol concentration (≤ 50 mg·L^-1). However, high concentration of phenol induced sludge bulking was difficult to recover. The short-term impact experiments showed that effluent COD and phosphorus fluctuation caused by phenol could be recovered gradually by removing phenol, suggesting that the inhibitory effect of phenol on phosphorus removal was reversible.

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