印染废水的改性凹凸棒土强化AO系统处理工艺

摘要

针对工业园区印染废水难生物降解的特性,研究AO系统投加改性凹凸棒土(ATP)对生物处理的影响.结果表明AO系统投加2g/L改性ATP后,COD去除率平均提高8.2％,提高NH4+进水浓度至50 mg/L时NH4+去除率提升超过7％,抗冲击负荷能力增强;SV30平均降低8.5％,MLVSS和SOUR分别提高411 mg/L和1.52 mg OJ(g VSS·h);活性污泥具备更好的生物相.其证明投加改性ATP可以强化活性污泥污染物降解能力,改善污泥沉降性能,提高微生物种群数量及活性,增强污泥系统整体稳定性.%For the non-biodegradable characteristic of dyeing wastewater from industrial park,influence of modified attapulgite(ATP) addition to the AO system on biological treatment was studied.Since the AO system added modified ATP with the dosage of 2 g/L,the results showed that COD removal increased by 8.2％ in average and NH4+ removal increased over 7％ when the influent concentration was improved to 50 mg/L,while the ability to resist impact load enhanced;SV30 decreased by 8.5％,while MLVSS and SOUR improved 411 mg/L and 1.52 mg O2/(g VSS · h),respectively;Activated sludge possessed better biophase.It proved that dosing modified ATP could strengthen the ability of pollution degradation with activated sludge,improved the sludge sedimentation performance,increased microbial population quantity and activity,and enhanced sludge system stability integrally.