摘要： 对川西区块压裂返排液的特征及组成进行了分析，选用预处理-Fenton-BDD高级氧化-活性炭过滤处理工艺处理该废液。试验以COD为目标因子优化了工艺参数。以CaO和PAC为破胶絮凝剂，投加质量浓度分别为9、4 g/L；Fenton反应pH=3.5，FeSO4·7H2O投加质量浓度9.0 g/L，H2O2加量10 mL/L，反应时间1 h；BDD氧化单元电流密度60 mA/cm2，反应时间2 h；椰壳活性炭过滤水力停留时间5 min，出水COD ≤ 100 mg/L，COD去除率≥ 97%，出水可直接综合利用。
关键词:
压裂返排液,
Fenton氧化,
电解,
高级氧化
Abstract: The characteristics and components of fracturing flow-back fluid in Western Sichuan block,China,have been analyzed by the combined treatment process,pretreatment-Fenton-BDD advanced oxidation-activated carbon filtration. Its technological parameters have been optimized by using COD as the target factor,CaO and PAC as gel breaking flocculants,CaO dosage is 9 g/L and Al2(SO4)3 dosage 4 g/L. Fenton reaction pH is 3.5,FeSO4·7H2O dosage 9.0 g/L,H2O2 dosage 10 mL/L,reaction time 1 h. BDD oxidation unit current density is 60 mA/cm2,reaction time 2 h, and hydraulic retention time is 5 min for the coconut shell activated carbon filtration process. The treated effluent COD is ≤ 100 mg/L,COD removing rate ≥ 97%,and can directly be utilized comprehensively.
Key words:
fracturing flow-back fluid,
Fenton oxidation,
electrolysis,
advanced oxidation
中图分类号:
胡志勇, 张太亮, 朱之庆, 罗平凯, 黄涛. 混凝-高级氧化组合工艺处理压裂返排液研究[J]. 工业水处理, 2018, 38(7): 81-84,94.
Hu Zhiyong, Zhang Tailiang, Zhu Zhiqing, Luo Pingkai, Huang Tao. Research on the treatment of fracturing flow-back fluid by the coagulation-advanced oxidation combined technology[J]. INDUSTRIAL WATER TREATMENT, 2018, 38(7): 81-84,94.