厨余发酵液为外碳源的A/O-MBR脱氮除磷特性  

Characteristics of Nitrogen and Phosphorus Removal in A/O-MBR Process with Fermentation Liquid of Food Waste as External Carbon Source

作　　者：王德美[1] 王晓昌[1] 唐嘉陵[1] 夏四清[1,2] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]同济大学环境科学与工程学院,上海200092

出　　处：《中国给水排水》2015年第7期18-21,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07310);陕西省污水处理与资源化重点科技创新团队项目(2013KCT-13);陕西省"百人计划"项目

摘　　要：利用厨余发酵液作为外碳源以改善A/O-MBR的脱氮除磷性能。结果表明:投加发酵液后反应器的脱氮除磷效果明显提高,出水NH+4-N、TN和PO3-4-P的平均浓度分别为0.72、7.25、1.78 mg/L,去除率分别达到96%、65%和85%以上。此外,厌氧污泥中的TP含量明显低于好氧污泥,而上清液中的PO3-4-P浓度高于好氧池,说明聚磷菌在厌氧条件下释磷,而在好氧条件下吸磷。释磷/吸磷批式试验进一步证实了在厌氧条件下主要进行释磷和反硝化过程,释磷速率达到5.66 mg/(g MLVSS·h),而在好氧条件下主要进行吸磷和硝化过程,吸磷速率和硝化速率分别为4.79、2.37 mg/(g MLVSS·h),较高的微生物活性有利于对污染物的去除。Fermentation liquid of food waste （FLFW） was utilized as external carbon source to im- prove nitrogen and phosphorus removal in the A/O -MBR process. The results showed that the nitrogen and phosphorus removal efficiencies were significantly increased by adding FLFW. The average concentrations of NH4^＋ - N, TN and PO4^3- - P in the effluent were 0.72 mg/L, 7.25 mg/L and 1.78 mg/L respectively, and the corresponding removal rates were above 96%, 65% and 85% respectively. In addition, TP in anaerobic sludge was lower than that in aerobic sludge, but PO4^3- - P in the supernatant of anaerobic tank was higher than that of aerobic tank, which illustrated that the PAOs released phosphorus under anaerobic condition and accumulated phosphorus under aerobic condition. Batch test further proved that phosphorus release and denitrification were completed under anaerobic condition, while phosphorus uptake and nitrification occurred under aerobic condition. The phosphorus release and uptake rates were 5.66 mg/（ gMLVSS·h） and 4.79 mg/（ gMLVSS· h） respectively, while the nitrification rate was 2.37 mg/（ gMLVSS ·h）, which indicated that the high microbial activity was beneficial to pollutant removal.

关 键 词：A/O—MBR 厨余发酵液 脱氮除磷 释磷速率 吸磷速率 

分 类 号：X703[环境科学与工程—环境工程]