Characteristics of Phosphorus Removal and Phosphorus Recovery in Advanced Sludge Reduction Process HA-A/A-MCO
Characteristics of Phosphorus Removal and Phosphorus Recovery in Advanced Sludge Reduction Process HA-A/A-MCO
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发表时间：
2009
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通讯作者：
Zong Shu-an
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作者：
Zong Shu-an
为了提高剩余污泥减量技术的除磷脱氮效果，开发了一种将剩余污泥减量与除磷脱氮相结合的先进工艺，即水解酸化-厌氧/缺氧-多级连续好氧工艺（HA-A/A-MCO）工艺，通过回流释磷污泥的水解酸化实现除磷，提高厌氧释磷水平，结果表明，当进入水解酸化池的厌氧释磷污泥量约为总进水量的2%时，水解酸化工艺产生的VFA能够诱导厌氧释磷达到57 mg/L，同时，当侧流除磷污水量为总进水量的13%，化学除磷池出水磷含量为5 mg/L时，系统出水TP <0.5 mg/L，系统中聚磷菌（PAOs）的生长得到明显促进，而糖原菌（GAOs）的生长受到抑制。提高厌氧释磷量，控制化学除磷池出水磷含量为5 mg/L，可以提高化学药剂的利用率，减少化学药剂的用量，提高化学污泥中的磷含量，HA-A/A-MCO系统中化学污泥中磷含量可达18%以上，其含量相当于磷化合物中的含量，磷可作为磷肥生产的原料回收利用。
In order to improve phosphorous and nitrogen removal in sludge reduction technologies,an advanced process combining excess sludge reduction and phosphorous and nitrogen removal was developed.It is the hydrolysis acidification-anaerobic/anoxic-multistep continuous oxic(HA-A/A-MCO) process.It realizes phosphorous removal through the hydrolysis acidification of returned P-release sludge,which improves anaerobic P-release level,and through discharging phosphorus-rich sewage.The results show that when the amount of anaerobic P-release sludge entering the hydrolysis acidification tank is about 2% of the total influent flow,VFA from hydrolysis acidification process is able to induce phosphorus content reaching 57 mg/L from anaerobic release.Meanwhile,the growth of phosphate-accumulating organisms(PAOs) in the system is improved greatly while that of glycogen-accumulating organisms(GAOs) is inhibited.When the amount of side-stream phosphorus removal sewage is 13% of the total influent flow,and the effluent phosphorus content of the chemical phosphorus removal tank is 5 mg/L,the effluent TP of the system is less than 0.5 mg/L.Moreover,increasing the phosphorus content from anaerobic release and controlling the effluent phosphorus content of the chemical phosphorus removal tank to 5 mg/L can improve the efficiency of chemicals,reduce the amount of chemicals required and increase the phosphorus content in chemical sludge.The phosphorus content in chemical sludge in the HA-A/A-MCO system reaches up to 18%,which is equivalent to the content in the phosphorus compound.The phosphorus can be recycled as raw material for production of phosphorus fertilizer.