摘要
对混凝-臭氧氧化处理焦化废水生化出水工艺进行研究,考察混凝剂聚合氯化铝(PAC)投加量、臭氧投加量、pH值和反应时间对混凝-臭氧氧化去除COD和色度的影响。在综合考虑处理成本和降解效果的前提下,提出反应体系的最佳工艺参数:PAC投加量为100 mg/L,臭氧投加量为8.50 mg/min,pH值为10.61,反应时间为30 min。最终COD去除率达到80.05%,色度降低96.74%,比单独臭氧氧化分别提高19.9百分点和29.19百分点。处理出水COD浓度为53.87 mg/L,色度可以降低到6倍,均达到了国家污水综合排放(GB 8978—1996)一级标准。
The process of coagulation-ozone oxidation for bio-treated coke plant effluents was studied,and the influence of poly-aluminum chloride（PAC） dosage,ozone concentration,pH value and reaction time on the removal of COD and chroma reduction was investigated. Based on both treatment cost and removal efficiency, optimum reaction conditions were proposed. Under the optimum conditions of a PAC dosage of 100 mg/L,an ozone concentration of 8.50 mg/min, a pH value of 10.61 and a reaction time of 30 min,the removal rate of COD and chroma reduction rate reached 80.05% and 96.74% ,respectively. As compared with single ozone oxidation,the removal rate of COD and chroma reduction rate by coagulation-ozone oxidation increased 19.9 and 29.19 percentage points, respectively. The treated wastewater had a COD concentration of 53.87 mg/L and chroma reached 6 times,which indicated that the qualities of this treated wastewater could meet the first level requirements of the National Integrated Wastewater Discharge Standard（GB 8978--1996）.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2011年第8期83-87,共5页
Petroleum Processing and Petrochemicals
关键词
混凝
聚合氯化铝
臭氧氧化
焦化废水
羟基自由基
coagulation
poly-aluminum chloride（PAC）
ozone oxidation
coke plant wastewater
hydroxyl radical
