On the relation between EPS phosphorus-adsorbing tendency and the bio-phosphorus removal

作者：Lu Chai · 发表于：Applied Mechanics and Materials · 年份：2012 · 被引用次数：1 · 研究领域：Wastewater Treatment and Nitrogen Removal、Phosphorus and nutrient management、Constructed Wetlands for Wastewater Treatment

This paper takes it as its goal to introduce its study results on the relation between EPS phosphorus-adsorbing trend and the bio-phosphorus removal.For this purpose,we have first of all to make clear the role the extra-cellular polymeric substances(EPS) are playing in the biological phosphorus removing process.And that is why we have conducted a simulated research of the urban sewage,trying to monitor the phosphorus removal effect of the anaerobic/aerobic(A/O) alternating SBR biological phosphorus removing system under the different sludge retention periods(SRP).In doing so,we have collected sufficient qualified activated sludge samples,observed and counted all the necessary phosphorus content in the unit mass sample,the EPS adsorbed phosphorus content and the phosphorus-accumulating bacteria(PAO) adsorbed phosphorus content.The results of our study show that,when the SRP is shorter than 48 days,the A/O-SBR biological phosphorus removing system is expected to achieve good removal effect.However,when the effluent total phosphorus concentrations are kept continuously less than 0.5 mg/L,it is expected to reach the optimal standard of the urban sewage treatment and ideal emission.In such a situation,the EPS adsorbed phosphorus content can store a certain amount of phosphorus,no more than 10 mgP/gVSS per gram of the activated sludge EPS adsorbed phosphorus content.And,if there is no change taking place with the EPS adsorbed phosphorus content,there will be 38 mgP/gVSS with per gr...