哈尔滨工业大学学报(英文版)
哈爾濱工業大學學報(英文版)
합이빈공업대학학보(영문판)
JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY(NEW SERIES)
2011年
5期
55-60
,共6页
彭赵旭%彭永臻%刘旭亮%于振波%柴同志
彭趙旭%彭永臻%劉旭亮%于振波%柴同誌
팽조욱%팽영진%류욱량%우진파%시동지
low temperature%activated sludge%SBR%nitrogen and phosphorus removal%sludge settleability
In order to investigate the effect of temperature on activated sludge systems,sludge settleability,nitrogen and phosphorus removal processes were investigated by changing temperature variation patterns using 4 sequencing batch reactors(SBR).The results showed that no matter temperature changes in the range of 15-22 ℃ (decrease or increase)gradually or sharply,it has little effect on nitrogen and phosphorus removal processes.But when temperature decreases to 12 ℃,biochemical reactions will be inhibitted obviously.At least 1 sludge retention time(SRT)is needed for nitrification adapt to new temperature envirionment,and more time is necessary for phosphorus removal process.When temperature increases from 12 ℃ to 22 ℃ sharply,nitrification process deteriorates seriously,but phosphorus removal process shows no change.In addition,sludge settleability deteriorates when temperature changes sharply(decrease or increase),but the reasons are different.Under temperature decrease condition,it is mainly caused by the increase of accumulated extracellular polymeric substances(EPS).Under temperature increase condition,the loosing sludge fiocs' configuration is the main reason.It should be pointed out that the filamentous bacteria content during the entire experiment keeps almost constant,and the sludge settleability variations are the reflection of the change of sludge physicochemical characteristics.