化学制药企业废水处理工程实例

李文杰()

doi:10.12153/j.issn.1674-991X.20200074

化学制药企业废水处理工程实例

doi: 10.12153/j.issn.1674-991X.20200074

李文杰()

甘肃省生态环境科学设计研究院

详细信息

中图分类号: X703
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出版历程
- 收稿日期: 2019-03-30
- 刊出日期: 2020-07-20

An example of wastewater treatment project in a chemical pharmaceutical enterprise

LI Wenjie()

Gansu Academy of Eco-environmental Sciences

摘要

摘要: 针对某化学制药企业的生产废水总氮(TN)、氨氮(NH₃-N)浓度高,含有大量难生物降解的有机物,水质pH变化大等特点,采用两级氨氮吹脱+综合调节+水解酸化+两级A/O+混凝沉淀处理的组合工艺对其进行处理。分析并研究了氨氮吹脱的最优工艺参数,调节pH至11.5,控制气液体积比为3 500∶1,吹脱率可以达到90%以上。结果表明,氨氮吹脱处理单元NH₃-N及TN去除率均达到94%,经过两级A/O和二沉池处理,化学需氧量(COD_Cr)、NH₃-N及TN去除率分别达到91.1%、96.3%及91.0%。组合工艺处理后的出水COD_Cr≤50 mg/L,NH₃-N浓度≤8 mg/L,TN浓度≤15 mg/L,SS浓度≤10 mg/L,水质达到GB 18918—2002《城镇污水处理厂污染物排放标准》的一级A标准,工艺处理成本为2.429元/m ³。
- 化学制药废水 /
- 两级氨氮吹脱 /
- 水解酸化 /
- 两级A/O /
- 混凝沉淀
Abstract: In view of the high concentrations of total nitrogen and ammonia nitrogen in the production wastewater of a chemical pharmaceutical enterprise, which contained a large number of organic compounds that were difficult to biodegrade, with a large change in acidity and alkalinity of the water quality, a combined process of two-stage ammonia nitrogen blow-off + comprehensive regulation + hydrolysis and acidification + two-stage A/O+ coagulation and precipitation was adopted to treat the wastewater. The optimal process parameters of ammonia nitrogen blow-off were analyzed and studied. When the pH was adjusted to 11.5, and the gas-liquid volume ratio was controlled to 3 500∶1, the blow-off rate could reach more than 90%. The operation results showed that the removal rates of NH₃-N and TN in the ammonia nitrogen blow-off treatment unit both reached 94%. After two-stage A/O and secondary sedimentation tank treatment, the removal rates of COD_Cr, NH₃-N and TN reached 91.1%, 96.3% and 91.0%, respectively. After the combined process, the effluent pollutant concentrations were COD_Cr≤50 mg/L, NH₃-N ≤8 mg/L, TN ≤15 mg/L, SS ≤10 mg/L, and the quality of the treated water reached Grade Ⅰ level A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), and the processing cost was 2.429 yuan/m ³.
- chemical pharmaceutical wastewater /
- two-stage ammonia nitrogen blow-off /
- hydrolysis and acidification /
- two-stage A/O /
- coagulation precipitation

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参考文献(16)

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