环境科学与管理
環境科學與管理
배경과학여관리
Environmental Science and Management
2015年
10期
114-118
,共5页
剩余污泥%PAC%毛细吸水时间%污泥容积指数%粒径%束缚水含量
剩餘汙泥%PAC%毛細吸水時間%汙泥容積指數%粒徑%束縳水含量
잉여오니%PAC%모세흡수시간%오니용적지수%립경%속박수함량
excess sludge%PAC%capillary suction time(CST)%sludge volume index(SvI)%particle size%bound water saturation
考察在调理过程中污泥和束缚水含量的变化,结果表明,PAC能够促进污泥絮体的絮凝作用,增大污泥粒径,降低束缚水含量,明显改善污泥脱水性能和沉降性能.随着PAC投药量的增大,污泥CST、SVI和粒径的变化速率逐渐减小,当PAC投药量大于0.8 g/L时,各指标变化较小并逐渐趋于稳定,继续投加PAC不能获得更好的调理效果;污泥束缚水含量呈先降低后升高趋势,在投药量为1.0 g/L处出现转折.在污泥PAC调理过程中,CST、SVI和污泥粒径相关性较强,可相互替代,而束缚水含量与CST相关性较弱,不能与其他指标互相替代.
攷察在調理過程中汙泥和束縳水含量的變化,結果錶明,PAC能夠促進汙泥絮體的絮凝作用,增大汙泥粒徑,降低束縳水含量,明顯改善汙泥脫水性能和沉降性能.隨著PAC投藥量的增大,汙泥CST、SVI和粒徑的變化速率逐漸減小,噹PAC投藥量大于0.8 g/L時,各指標變化較小併逐漸趨于穩定,繼續投加PAC不能穫得更好的調理效果;汙泥束縳水含量呈先降低後升高趨勢,在投藥量為1.0 g/L處齣現轉摺.在汙泥PAC調理過程中,CST、SVI和汙泥粒徑相關性較彊,可相互替代,而束縳水含量與CST相關性較弱,不能與其他指標互相替代.
고찰재조리과정중오니화속박수함량적변화,결과표명,PAC능구촉진오니서체적서응작용,증대오니립경,강저속박수함량,명현개선오니탈수성능화침강성능.수착PAC투약량적증대,오니CST、SVI화립경적변화속솔축점감소,당PAC투약량대우0.8 g/L시,각지표변화교소병축점추우은정,계속투가PAC불능획득경호적조리효과;오니속박수함량정선강저후승고추세,재투약량위1.0 g/L처출현전절.재오니PAC조리과정중,CST、SVI화오니립경상관성교강,가상호체대,이속박수함량여CST상관성교약,불능여기타지표호상체대.
Researches on sludge and bound water ratio changes during the treatment process show that PAC can accelerate the actions of flocculants, increase size of sludge particles, reduce bound water contents and improve dewatering and sedimentation capabilities of the sludge.With the increase of PAC dosage, the variation speed of CST, SVI and particle size of sludge slow down gradually.When PAC dosage is larger than 0.8g/L, the changing speed of all indexes stabilizes and additional PAC does not guarantee better treatment effects.The bound water content in sludge decreases at first, but shows an uprising trend when PAC dosage reached 1.0g/L.In the treatment process, CST, SVI and sludge particle size show high correlation and could be used as replaceable indexes.Bound water content and CST has low correlation and could not be used as replaceable indexes.
