YANGZi-kang,GONGMao-chun,JIANGHong-kai,et al.Operation Performance of a Hemp Dyeing and Finishing PVA Production Wastewater Treatment Plant[J].China Water & Wastewater,2025,41(16):96-102.
麻染整PVA生产废水处理工程运行性能研究
- Title:
- Operation Performance of a Hemp Dyeing and Finishing PVA Production Wastewater Treatment Plant
- 摘要:
- 某麻染整聚乙烯醇（PVA）废水处理工程（处理规模为1 500 m3/d）采用二级水解酸化+气浮+厌氧+A/O+深度处理为主体的处理工艺，进水COD平均为3 357 mg/L，平均去除率可达96.04%。其中，水解酸化单元COD平均去除负荷为0.39 kg/（m3·d），COD去除率平均为50.41%；综合废水厌氧池平均COD去除负荷为0.31 kg/（m3·d），COD去除率平均为24.51%；A/O池COD去除率平均为85.04%。该工程实际出水水质达到《纺织染整工业水污染物排放标准》（GB 4287—2012）的间接排放标准。同时指出PVA同类废水处理存在的一些共性问题，如药剂投加量大、污泥回流比大、O池溶解氧浓度高和易产生泡沫及黑色浮渣等，这也是今后工程优化和深入研究的方向。
- Abstract:
- A hemp dyeing and finishing PVA wastewater treatment plant with capacity of 1 500 m3/d adopts the main process of two-stage hydrolytic acidification + air flotation + anaerobic treatment + A/O + advanced treatment. The average COD of influent was 3 357 mg/L, and the average removal rate could reach 96.04%. In hydrolytic acidification unit, the average COD removal load is 0.39 kg/(m3·d), and the average COD removal rate is 50.41%. In anaerobic tank, the average COD removal load is 0.31 kg/(m3·d), and the average COD removal rate is 24.51%. The average COD removal rate of A/O tank is 85.04%. The effluent quality of the system can meet the requirements of indirect discharge criteria of Discharge Standard of Water Pollutants for Dyeing and Finishing of Textile Industry (GB 4287-2012). The study also found some common challenges in the treatment of similar PVA wastewater, such as large dosage of chemicals, high sludge reflux ratio, high concentration of dissolved oxygen, and the propensity of foam and black scum formation, which pointed out the direction for future engineering optimization and further research.
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