摘要：

开展了厌氧与缺氧/好氧交替式SBR处理实际印染废水的小试研究。厌氧SBR处理印染废水的COD平均去除率为75%，平均出水COD为237 mg/L。缺氧/好氧交替式SBR采用分段进水和外加碳源的方式处理厌氧SBR出水，两段进水分配比为800 mL：200 mL时，处理效果较佳，仅因反硝化碳源不足导致出水总氮未满足《纺织染整工业水污染物排放标准》(GB 4278-2012)的直接排放标准；外加葡萄糖的实际与理论投加量之比为3时，处理效果最佳，出水平均COD为79 mg/L、氨氮为0.4 mg/L、总氮为13.5 mg/L、总磷为0.14 mg/L，均满足直接排放标准。

关键词: 厌氧SBR, 缺氧/好氧交替式SBR, 印染废水, 脱氮除磷, 分段进水, 外加碳源

Abstract:

Lab-scale anaerobic and anoxic/aerobic alternative SBR was used for real printing and dyeing wastewater treatment. The average COD removal rate and effluent COD of anaerobic SBR treating raw wastewater was 75% and 237 mg/L. Anaerobic SBR effluent was further treated by anoxic/aerobic alternative SBR with the mode of step-wise feeding and external carbon source. When the two-step feeding ratio was 800 mL:200 mL, the treatment performance of anoxic/aerobic alternative SBR was better, where only total nitrogen could not meet the direct discharge standards of water pollutants for dyeing and finishing of textile industry(GB 4278-2012) due to insufficient carbon source for denitrification. When the ratio of real external carbon source(glucose) dosage vs. theoretical dosage for denitrification was 3, the treatment performance of anoxic/aerobic alternative SBR was best, where average effluent COD(79 mg/L), ammonia nitrogen(0.4 mg/L), total nitrogen(13.5 mg/L) and total phosphorus(0.14 mg/L) could meet the direct discharge standards.

Key words: anaerobic SBR, anoxic/aerobic alternative SBR, printing and dyeing wastewater, nitrogen and phosphorus removal, step-wise feeding, external carbon source

中图分类号: 

• X703.1