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针对河南油田采油污水,室内选择4种常用无机絮凝剂与阳离子聚丙烯酰胺(CPAM)复配,筛选出最佳的絮凝剂用量:聚合氯化铝(PAC)用量为300 mg/L,CPAM用量为10 mg/L。研究了投加HPAM降解菌对油田含聚污水中COD的去除效果,优选出2株以聚合物(HPAM)为唯一碳源的降解菌,通过分子生物学16SrDNA鉴定,XL-1和XL-2菌分别为苏云金芽孢杆菌和溶血不动杆菌。实验结果表明,在温度为30℃,pH为7.5,降解72 h的条件下,XL-1菌的B/C增大了0.11,COD去除率提高了11.03%;XL-2菌的B/C增大了0.07,COD去除率提高了6.3%。油田污水经絮凝-生物强化组合工艺处理后,出水COD平均值为77.1 mg/L,总去除率为73.2%,絮凝段和生化段工艺的COD去除率分别为54.1%和19.1%,达到《污水综合排放标准(GB/T 8978-1996)》排放标准。
In this paper, four kinds of common inorganic flocculants and cationic polyacrylamide (CPAM) were selected for indoor production of sewage in Henan Oilfield. The optimal flocculant dosage was selected: polyaluminium chloride (PAC) dosage was 300 mg / L, CPAM dosage For 10 mg / L. The removal of COD from HPAM-degrading bacteria was studied. Two degrading bacteria with polymer (HPAM) as the sole carbon source were selected, identified by molecular biology 16SrDNA, XL-1 and XL-2 Bacillus thuringiensis and Acinetobacter spp. The results showed that the B / C of XL-1 increased by 0.11 and the COD removal rate increased by 11.03% under the condition of the temperature of 30 ℃, the pH of 7.5 and the degradation of 72 h. The B / C of XL- Increased by 0.07, COD removal rate increased by 6.3%. The effluent COD was 77.1 mg / L and the total removal rate was 73.2%. The removal rates of COD in the flocculation section and biochemical section were 54.1% and 19.1% respectively, reaching the maximum of “Sewage Integrated emission standards (GB / T 8978-1996) ”emission standards.