不同污泥负荷厌氧-好氧间歇式活性污泥工艺除磷

基于厌氧-好氧-间歇式活性污泥系统,探讨了反应温度分别在15、25℃下COD污泥负荷对生物除磷系统的影响.将进水TP的质量浓度恒定为(10±0.5)mg·L~(-1),以比较厌氧段末和出水TP的含量.结果表明,在2个温度条件下,随着COD污泥负荷的升高,出水TP含量降低,当COD污泥负荷≥0.46 mg·mg~(-1)·d~(-1)时,出水TP的质量浓度低于1 mg·L~(-1);厌氧段释磷量与COD污泥负荷均存在很好的线性关系:y_1=0.72+71.91_x1(25℃),y_2=2.81+73.3_x2(15℃);在COD污泥负荷相同条件下,15℃时TP去除效果比25℃平均高5%左右.

THE REMOVAL PHOSPHORUS EFFECT IN DIFFERENT SLUDGE LOAD CONDITIONS IN A/O-SBR

Based on NO-SBR this study discussed on biological removal phosphorus system in the reaction temperature at 15 ℃ and 25 ℃ under the conditions of COD load of sludge. Total phosphorus concentration of influent was kept for (10±0.5) mg·L~(-1), to compare TP concentration the effluent and the end of anaerobic period. The results showed that: ① two temperatures with the COD load of sludge was raised from the effluent to reduce the concentration of TP, when the sludge COD load ≥ 0.46 mg·mg~(-1)·d~(-1), the effluent TP concentration was lower than 1 mg·L~(-1); ② in reaction temperature of 25 ℃ and 15℃. the amount of anaerobic release phosphorus and COD load of sludge are very good correlation, Jinear relationship between the two were: y_1=0.72+71.91_x1 (25℃), y_2=2..81+73.33_x2 (15 ℃); ③in the COD load of sludge under the same conditions, the remove rate in 15℃ is higher 5％ than the one in 25℃ .