In this paper,we present a complex cooperative search technique for finding the Random Walking microorganism cells on one of n-intersect real lines at the origin.We have 2n unit speed searchers starting together from ...In this paper,we present a complex cooperative search technique for finding the Random Walking microorganism cells on one of n-intersect real lines at the origin.We have 2n unit speed searchers starting together from the origin.Furthermore,proving the existence of a finite search plan,we are discussing the existence of optimality for this search plan which minimizes the expected value of the first meeting time between one of the searchers and the microorganism cells.展开更多
考察了A2/O同步化学除磷工艺中Al2(SO4)3投加量对TP、COD、NH+4-N和TN的去除率与活性污泥性能的影响。结果表明,常温(18~32℃)条件下同步化学除磷最适宜的Al2(SO4)3投加量为铝、磷摩尔比0.5∶1,此条件下出水TP、COD、NH+4-N和TN浓度均...考察了A2/O同步化学除磷工艺中Al2(SO4)3投加量对TP、COD、NH+4-N和TN的去除率与活性污泥性能的影响。结果表明,常温(18~32℃)条件下同步化学除磷最适宜的Al2(SO4)3投加量为铝、磷摩尔比0.5∶1,此条件下出水TP、COD、NH+4-N和TN浓度均能达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级A标准。研究同时发现,Al2(SO4)3投加后,活性污泥的沉降性能和污泥活性均有所增强,其中SVI值由93.8 m L·g-1降至81.3 m L·g-1,Zeta电位由-5.5 m V降至-11.8 m V,胞外聚合物EPS含量增加了59.9%,蛋白质与多糖的比例由5.2降至2.1,比耗氧速率由4.2 mg·(g·min)-1升高到6.7 mg·(g·min)-1(以MLSS计)。微生物菌群结构分析结果表明,投药后污泥中微生物种类由投药前的8种减少为6种,硝化菌和反硝化菌比例有所降低,聚磷菌比例升高为6%。在低温(0~10℃)条件下,Al2(SO4)3投加量需有所增加,当铝、磷摩尔比为1∶1时,反应器出水TP、COD、TN和NH+4-N浓度方可达到一级A标准。展开更多
文摘In this paper,we present a complex cooperative search technique for finding the Random Walking microorganism cells on one of n-intersect real lines at the origin.We have 2n unit speed searchers starting together from the origin.Furthermore,proving the existence of a finite search plan,we are discussing the existence of optimality for this search plan which minimizes the expected value of the first meeting time between one of the searchers and the microorganism cells.
文摘考察了A2/O同步化学除磷工艺中Al2(SO4)3投加量对TP、COD、NH+4-N和TN的去除率与活性污泥性能的影响。结果表明,常温(18~32℃)条件下同步化学除磷最适宜的Al2(SO4)3投加量为铝、磷摩尔比0.5∶1,此条件下出水TP、COD、NH+4-N和TN浓度均能达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级A标准。研究同时发现,Al2(SO4)3投加后,活性污泥的沉降性能和污泥活性均有所增强,其中SVI值由93.8 m L·g-1降至81.3 m L·g-1,Zeta电位由-5.5 m V降至-11.8 m V,胞外聚合物EPS含量增加了59.9%,蛋白质与多糖的比例由5.2降至2.1,比耗氧速率由4.2 mg·(g·min)-1升高到6.7 mg·(g·min)-1(以MLSS计)。微生物菌群结构分析结果表明,投药后污泥中微生物种类由投药前的8种减少为6种,硝化菌和反硝化菌比例有所降低,聚磷菌比例升高为6%。在低温(0~10℃)条件下,Al2(SO4)3投加量需有所增加,当铝、磷摩尔比为1∶1时,反应器出水TP、COD、TN和NH+4-N浓度方可达到一级A标准。
