负荷冲击对SBR系统处理高盐有机废水的影响

Impact of Loading Shock on SBR System for Treating High-salt Organic Wastewater

采用SBR系统处理高盐有机废水,考察了有机负荷、氨氮负荷和盐度负荷冲击对COD和NH_3-N去除效果的影响。结果表明,进水COD浓度在1021.6～4981.2mg/L范围内波动时,COD去除率能保持在90%以上,但降低有机负荷会导致COD去除率略有降低。降低进水NH_3-N浓度对其去除的影响较小,而升高NH_3-N浓度到297.5～495.9 mg/L时,需连续运行2～3个周期后NH_3-N去除率才能恢复至90%以上。盐度负荷的降低对COD和NH_3-N去除率的影响较小,当NaCl浓度升高到41197.2～65915.5 mg/L时,连续运行2个周期后COD和NH_3-N去除率可恢复到90%以上。

SBR system was used to treat high-salt organic wastewater, and the impact of organic, ammonia and salinity loading shock on COD and NH3-N removal were investigated. The results showed that COD removal rates could be maintained above 90 % when the influent COD concentration fluctuated in the range of 1021.6～4981.2 mg/L, but it would be slightly reduced by reducing the organic loading. Reducing NH3-N concentration had little effect on NH3-N removal, but increasing NH3-N concentration to 297.5～495.9 mg/L required continuous operation for 2～3 cycles before NH3-N removal rates could be restored to more than 90 %. When NaCl concentration increased to 4197.2～65915.5 mg/L, the COD and NH3-N removal rates could be restored to more than 90% after 2 consecutive cycles.