剩余污泥驯化过程中的除磷性能  

Phosphorus Removal Performance During the Recovery Process of Residual Sludge

作　　者：彭赵旭 韩微 娄天宇 姜昆 李磊[1] PENG Zhaoxu;HAN Wei;LOU Tianyu;JIANG Kun;LI Lei(School of Water Conservancy Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学水利科学与工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2020年第5期72-75,96,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省高等学校重点科研项目(20B560018);国家水体污染控制与治理科技重大专项(2015ZX07204-002)。

摘　　要：为了探究闲置剩余污泥活性恢复过程中除磷性能的变化,采用厌氧-好氧交替运行的序批式间歇反应器(SBR)进行驯化,考察了比释(吸)磷量、比释(吸)磷速率、污泥浓度、吸释比(好氧吸磷量与厌氧释磷量的比值)等指标的变化。结果发现:在污泥龄控制为12.5 d的情况下,比释磷量与比吸磷量的恢复进程保持同步,其相关系数为0.927。除磷性能在活性污泥更新了16.7%时开始复苏,更新了45.8%后迅速提高,此时吸释比稳定在1.5~2,活性污泥更新58.3%时除磷性能基本完全恢复。厌氧段释磷期间pH的下降值可以间接指示吸磷表现,厌氧段pH在硝酸盐膝后的降低值与释磷量间的相关系数为0.675,而氧化还原电位(ORP)无论在厌氧还是好氧过程均无法指示除磷性能的变化。结构稳定的活性污泥是生物除磷性能恢复的前提,驯化过程中污泥浓度趋于稳定时除磷性能开始显著改善。In order to investigate phosphorus removal performance during the recovery process of residual sludge,an anaerobic-aerobic alternating sequencing batch reactor(SBR)was used for domestication,and the changes of specific phosphorus release(uptake)amount,specific phosphorus release(uptake)rate,MLSS and the ratio of phosphorus uptake to phosphorus release(uptake-release)were investigated.It was found that when the sludge retention time was controlled at 12.5 d,specific phosphorus release amount and specific phosphorus uptake amount were increased synchronously,the correlation coefficient was 0.927.Phosphorus removal performance began to recover when the activated sludge was regenerated by 16.7%,and improved obviously after 45.8%.At this time,the ratio of uptake-release was stable at 1.5~2.When activated sludge was regenerated by 58.3%,phosphorus removal performance almost recovered completely.The decrease of pH during anaerobic stage could indirectly indicate the performance of phosphorus release.The correlation coefficient between the variation of pH after the nitrate knee and the phosphorus release amount was 0.675,while the oxidation and reduction potential(ORP)could not indicate phosphorus removal performance either in the anaerobic stage or aerobic stage.A stable structure of activated sludge was the prerequisite for biological phosphorus removal.When the sludge concentration was stable during domestication process,the phosphorus removal performance began to improve significantly.

关 键 词：闲置污泥 活性恢复 释磷量 吸磷量 除磷性能 

分 类 号：X703.1[环境科学与工程—环境工程]