| 混凝-生物接触氧化处理合成橡胶碱洗废水 |
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| 引用本文： | 张衍, 郑炜, 刘锐, 李伟, 李荧, 陈吕军. 混凝-生物接触氧化处理合成橡胶碱洗废水[J]. 环境工程学报, 2012, 6(12): 4355-4360. |
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| 作者姓名： | 张衍 郑炜 刘锐 李伟 李荧 陈吕军 |
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| 作者单位： | 1. 清华大学环境学院,北京 100084; 2. 浙江省水质科学与技术重点实验室, 嘉兴 314050; 3. 浙江双益环保科技发展有限公司,嘉兴 314000 |
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| 基金项目： | 嘉兴市科技计划项目(2011AZ1012);南湖区科技计划项目(2011QH05) |
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| 摘 要： | 对化学合成橡胶碱洗废水进行了有机组分和可生化性分析,废水主要含有氯甲烷、六甲苯、异丁醇、甲醇等污染物质,生化降解实验中废水TOC可在6 d内从60.9 mg/L下降至0.0 mg/L,可生化降解性好,适于生化处理。选择混凝-生物接触氧化组合工艺对废水进行处理,采用优化条件(pH=8、PAC=40 mg/L、PAM=8 mg/L)进行混凝,碱洗废水COD去除率为9.95%~72.94%(平均31.51%);混凝后的碱洗废水与冲洗废水1∶5混合进行接触氧化处理,在HRT为36 h的情况下,COD去除率为65.6%~72.6%(平均70.4%),出水COD为134~331 mg/L,满足企业废水排放市政管网的要求;同时,实验发现COD去除率与COD容积负荷存在指数函数变化关系。
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| 关 键 词： | 合成橡胶 碱洗废水 生物接触氧化 混凝 可生化性 GC/MS |
| 收稿时间： | 2011-12-01 |
Treatment of alkaline wastewater from synthetic rubber production by coagulation and biological contact oxidation |
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| Zhang Yan, Zheng Wei, Liu Rui, Li Wei, Li Ying, Chen Lüjun. Treatment of alkaline wastewater from synthetic rubber production by coagulation and biological contact oxidation[J]. Chinese Journal of Environmental Engineering, 2012, 6(12): 4355-4360. |
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| Authors: | Zhang Yan Zheng Wei Liu Rui Li Wei Li Ying Chen Lüjun |
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| Affiliation: | 1. School of Environment, Tsinghua University, Beijing 100084, China; 2. Key Lab of Water Science & Technology of Zhejiang Province, Jiaxing 314050, China; 3. Zhejiang Shuangyi Environmental Technology Development Co. Ltd., Jiaxing 314000, China |
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| Abstract: | Organic components in an alkaline wastewater generated from production of synthetic rubber were analyzed by GC/MS, pollutants such as chloromethane, hexamethylbenzene, isobutanol and methanol were detected. TOC was reduced from 60.9 mg/L to 0.0 mg/L in 6 d in the biodegradability test, which indicated that the wastewater was suitable for biological treatment. The process of coagulation and biological contact oxidation (BCO) was chosen accordingly for the wastewater treatment. By coagulation, COD removal of 9.95%~72.94% (31.51% in average) was achieved under the optimal conditions of pH 8, PAC of 40 mg/L, and PAM of 8 mg/L. The wastewater was then mixed with the cleaning and flushing wastewater at the volumetric ratio of 1∶5. By BCO with HRT 36 h, COD was removed by 65.6%~72.6% (70.4% in average) from the hybrid wastewater. The effluent COD was 134~331 mg/L, which could meet the standard for discharging to municipal drainage. An exponential relationship between COD removal and COD volume loading was revealed in the BCO. |
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| Keywords: | synthetic rubber alkaline wastewater biological contact oxidation coagulation biodegradability GC/MS |
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