Deng Liang-wei, Zheng Ping, Li Shu-lan, Sun Xin, Tang Yu-zhen
Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China.
Huan Jing Ke Xue. 2005 Nov;26(6):105-9.
When digested piggery wastewater was directly treated with a sequencing batch reactor (SBR) process, the efficiency was low with COD removal about 10% and NH4+ -N removal about 70%. The effluent COD concentration was higher than 1000 mg/L and effluent NH4+ -N concentration was 200 mg/L or so. The working state of the reactor was unstable and its performance deteriorated gradually during operation. After adding no-digested piggery wastewater (raw wastewater) to digested piggery wastewater in the influent, the reactor performance was significantly improved with COD removal higher than 80% and NH4+ -N removal up to 99%. The effluent COD concentration was in the range of 250 mg/L to 350 mg/L and effluent NH4+ -N concentration was lower than 10 m/L. The working stability of the reactor was greatly increased. After adding raw wastewater, the ratio of BOD5 to COD in the influent was raised from 0.19 to 0.54, and the ratio of BOD5 to TN was raised from 0.28 to 2.04, which implied an increase of carbon source for microbial growth and denitrification. The elevated denitrification resulting from the increase of carbon source not only promoted the removal of total nitrogen, but also stabilized the pH value by supplementing alkalinity to treatment system.
当采用序批式反应器（SBR）工艺直接处理消化猪场废水时，处理效率较低，化学需氧量（COD）去除率约为10%，氨氮（NH4+-N）去除率约为70%。出水COD浓度高于1000mg/L，出水NH4+-N浓度约为200mg/L。反应器运行状态不稳定，运行过程中其性能逐渐恶化。在进水的消化猪场废水中添加未消化的猪场废水（原废水）后，反应器性能显著提高，COD去除率高于80%，NH4+-N去除率高达99%。出水COD浓度在250mg/L至350mg/L范围内，出水NH4+-N浓度低于10mg/L。反应器的运行稳定性大大提高。添加原废水后，进水的生化需氧量（BOD5）与COD的比值从0.19提高到0.54，BOD5与总氮（TN）的比值从0.28提高到2.04，这意味着微生物生长和反硝化的碳源增加。碳源增加导致的反硝化作用增强不仅促进了总氮的去除，还通过向处理系统补充碱度稳定了pH值。
