混凝沉淀-厌氧/好氧组合工艺处理港口含油废水的运行与优化
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摘要
采用混凝沉淀-厌氧/好氧组合工艺处理港口含油废水。选用聚合氯化铝铁(PAFC)作为混凝剂;通过响应面法选择了最优工艺参数:pH 8.0, PAFC投加量100 mg/L沉降时间40 min;出水进入厌氧/好氧生化处理系统(A/O)。港口含油污水经过A池后,BOD/COD平均值由初始的0.17升高至0.55,可生化性增加明显。试验结果表明有机容积负荷是A/O反应器运行过程中的重要控制参数;其对A池冲击大,很容易使A池产生酸化现象,甚至导致反应器的崩溃。A池处理试验用港口含油废水的最佳有机负荷应为1.0～2.0 kgCOD/(m~3·d)。当进水水质变化时,可通过调节水力停留时间及回流比等达到反应器有效调控的目的。
The coagulation-sedimentation-anoxic-oxic combined process was used to treat harbor Oil-Containing Wastewater. Polymeric aluminum ferric chloride(PAFC) was selected as coagulant, and the optimum parameters were selected by response surface methodology: pH 8, PAFC dosage 100 mg/L, and settling time 40 min. The effluent was introduced into anoxic-oxic biochemical treatment system(A/O). After A tank, the average value of BOD/COD increased from 0.17 to 0.55, meaning the biodegradability increased obviously. The experimental results shown that the organic volumetric load(OLR) was an important control parameter in the operation of A/O reactor, especially on A tank. It was easy to generate acidification in A tank, or even lead to the collapse of the reactor under high OLR. The optimum OLR of the A tank should be 1.0～2.0 kgCOD/(m~3·d). When the water quality is changed, the hydraulic retention time and the reflux ratio could be adjusted to achieve the purpose of effective control of the reactor.
The coagulation-sedimentation-anoxic-oxic combined process was used to treat harbor Oil-Containing Wastewater. Polymeric aluminum ferric chloride(PAFC) was selected as coagulant, and the optimum parameters were selected by response surface methodology: pH 8, PAFC dosage 100 mg/L, and settling time 40 min. The effluent was introduced into anoxic-oxic biochemical treatment system(A/O). After A tank, the average value of BOD/COD increased from 0.17 to 0.55, meaning the biodegradability increased obviously. The experimental results shown that the organic volumetric load(OLR) was an important control parameter in the operation of A/O reactor, especially on A tank. It was easy to generate acidification in A tank, or even lead to the collapse of the reactor under high OLR. The optimum OLR of the A tank should be 1.0～2.0 kgCOD/(m~3·d). When the water quality is changed, the hydraulic retention time and the reflux ratio could be adjusted to achieve the purpose of effective control of the reactor.
引文
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[11]周莉莉. 化工合成制药废水的高效厌氧生物处理技术研究[D]. 天津:天津大学,2010.
[2]董宏, 张锦, 邵秘华, 等. 电芬顿处理船舶含油废水的动力学影响因素研究[J] . 水道港口,2007,28 (5): 357-361.DONG H ,ZHANG J , SHAO M H, et al. Effective factors of kinetic of Electro-Fenton treatment of oil wastewater from ship [J]. Journal of Waterway and Harbor, 2007, 28 (5): 357-361.
[3]王建功. 港口集装箱洗箱废水超滤法回用处理技术研究[J] . 水道港口,2007,28 (5): 362-365.WANG J G. Study on treatment and reuse of container washing wastewater using ultrafiltration method. [J]. Journal of Waterway and Harbor, 2007, 28 (5): 362-365.
[4]李国一,王彬. 天津港南疆含油废水处理系统改造工程的设计与运行[J]. 中国给水排水,2008,24 (24):42-44.LI G Y, WANG B. Design and operation of reconstruction project of Nanjiang Harbor oil-containing wastewater treatment system in Tianjin Port [J]. China Water and Wastewater, 2008, 24 (24): 42-44.
[5]Yanjie Wei, Guoyi Li. Membrane fouling behavior and microbial community succession in a submerged membrane bioreactor treating harbor oily wastewater [J]. Journal of Zhejiang University Science A:Applied Physics & Engineering, 2016, 9: 745-757.
[6]初江涛,张荣祥. UF + RO 技术在港区含油污水深度处理回用中的应用研究[J] . 水道港口,2018, 39 (3): 355-359.CHU J T, ZHANG R X. Application of UF + RO technology in deep treatment and reuse of oily sewage in port [J]. Journal of Waterway and Harbor, 2018, 39 (3): 355-359.
[7]国家环境保护局. 水和废水监测分析方法 (第四版)[M]. 北京: 中国环境科学出版社, 2003.
[8]杨洁. 碱和超声波预处理技术促进污泥厌氧消化效能及机理研究[D]. 天津:天津大学,2008.
[9]胡万里. 混凝·混凝剂·混凝设备[M]. 北京:化学工业出版社,2001.
[10]秦菲菲. 码头堆场雨水综合处理与回用[J]. 交通科技, 2015, 269 (2): 176-178.QIN F F. Treatment and reuse of rainwater in port storage yard[J]. Transportation Science and Technology, 2015, 269 (2): 176-178.
[11]周莉莉. 化工合成制药废水的高效厌氧生物处理技术研究[D]. 天津:天津大学,2010.
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