摘要
对高浓度生活污水磷酸盐生物还原系统构建过程中的磷平衡和磷形态进行了研究。结果表明，反应器在负荷为1．0kgCOD／（m^3·d）、DO浓度为6mg／L、温度为30℃、不外排污泥、连续曝气的条件下，运行25d期间对TP的去除率稳定在85％～93％；生物膜污泥中的聚合磷酸盐含量仅为0．274mgP／gDS，而结合态磷化氢含量高达3．51×10^6ngP／kgWS；系统每天对外源磷的去除量为44．2mg，共损失0．77g的磷，成功构建了磷酸盐生物还原除磷系统。与接种污泥相比，运行25d后生物膜污泥中的有机磷（Org-P）和无机磷含量分别减少了3．0和1．43mgP／gDS；在各种无机形态磷中，水溶性活性磷（H2O-P）、金属结合态磷（NaOH-P）、氧化还原敏感态磷（BD-P）、难溶性的无机和有机态聚合磷（NaOH85-P）含量分别减少了84．1％、13．7％、6．24％、27．3％，钙结合态磷（HCl-P）含量增加了68．9％，据此推断磷形态的转化途径可能是Org-P→H2O-P→NaOH-P→BD-P→NaOH85-P→HCl-P．
Phosphorus forms and phosphorus balance were studied during construction of a phosphate reduction system with high concentration domestic sewage. At loading rate of 1.0 kgCOD/（m3 · d）, DO of 6 mg/L, temperature of 30℃, no sludge discharge and continuous aeration, TP removal was 85 % to 93% during operation period of 25 d, and polyphosphate and matrix-bound phosphine in sludge were 0. 274 mgP/gDS and 3.51 ×^ 106 ngP/kgWS, respectively. 44.2 mg per day of external phosphorus was removed in the reactor, totaling 0.77 g of phosphorus, so a phosphate reduction system was successfully constructed. Organic phosphorus （Org-P） and inorganic phosphorus in sludge were 3.0 mgP/gDS and 1.43 mgP/gDS, respectively, less than those in seed sludge. H2O-P, NaOH-P, BD-P, NaOH85-P were reduced by 84.1% , 13.7% , 6.24% and 27.3% , respectively. HCl-P was increased by 68.9%. The transformation of phosphorus forms in sludge was probably Org-P→H2O-P→NaOH-P→BD-P→NaOH85- P→ HCl-P.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第13期105-108,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(2009ZX07315-005)
关键词
生活污水
磷酸盐还原
磷平衡
磷形态
domestic sewage
phosphate reduction
phosphorus balance
phosphorus form
