m(C)/m(P)对污泥絮体中磷形态与分布及除磷能力的影响

EFFECT OF m(C)/m(P) ON FORMS AND DISTRIBUTION OF PHOSPHORUS IN SLUDGE FLOC AND PHOSPHATE REMOVAL CAPACITY

采用连续流强化生物除磷系统(EBPR),研究进水m(C)/m(P)对聚磷菌(PAOs)的除磷能力和污泥絮体中磷的形态与分布的影响。结果表明,在进水m(C)/m(P)分别为100、65、45条件下,系统有稳定高效的除磷效果,磷的去除率维持在88%以上。将进水m(C)/m(P)由100降低至45,PAOs可以合成和消耗更多量的单位污泥胞内聚合物,污泥好氧消耗单位PHA的吸磷量由0.52 mg/(mg·L)提高至0.64 mg/(mg·L);低m(C)/m(P)的污泥表现出更高的TP和各形态磷含量,且在厌氧、好氧过程中,污泥中TP和无机磷有更大的增加量,对应着更显著的生物除磷过程,对应着低m(C)/m(P)的污泥絮体有更强的好氧吸磷能力。

Effects of m（C）/m（P） influent on phosphate removal capacity of phosphate accumulating organisms（PAOs） and forms and distribution of phosphorus in sludge flocs were investigated in a continuous enhanced biological phosphorus removal system（EBPR）.The results showed that the process could achieve high-efficiency and stable phosphorus removal performance,and phosphorus removal rate maintained above 88% under the conditions of m（C）/m（P） influent being 100,65,45 respectively.When the m（C）/m（P） decreased from 100 to 45,more unit sludge intracellular polymer substances were synthesized and consumed by PAOs,and the amount of phosphate-P by consuming unit PHA of aerobic sludge raised from 0.52 mg/（mg·L）to 0.64 mg/（mg·L）.Total phosphorus（TP） and the amount of phosphorus forms of sludge were high in low m（C）/m（P） sludge.In the course of anaerobic/aerobic reaction,total phosphorus（TP） and inorganic phosphorus（IP） increased in the sludge,indicating that biological phosphorus removal was obvious and sludge flocs of low m（C）/m（P） had strong capacity of aerobic phosphorus adsorption.