摘要
以剩余污泥臭氧化过程中含磷物质的形态分布及变化规律为研究核心,分析了不同臭氧投加量下污泥样品中液相和固相中磷的形态,并探讨了不同磷形态与臭氧相关的释放性能.结果表明,臭氧投加量为0.15 g·g^-1时,液相总磷(TPL)含量为38.26 mg·L^-1,比氧化前污泥混合液中TPL含量增加了29倍,因此,可将0.15 g·g^-1作为实际释磷工艺最佳臭氧投加量.臭氧氧化过程中污泥固相中各形态磷含量及其所占固相总磷(TPS)比例的变化趋势基本相同.臭氧可提高污泥中磷潜在的生物可利用性,臭氧投加量为0.15 g·g^-1时,生物有效磷含量达20.74 mg·g^-1,在TPS中所占比例由原始污泥中的73.60%提高至86.27%.TPL含量的增加主要来自污泥臭氧氧化过程中污泥解絮和溶胞,每溶解1 g MLSS向液相中释放TPL的量为0.0324 g.
The mechanism of the sludge reduction through ozonation was systematically investigated using the excessive sludge obtained from municipal sewage treatment plants.The phosphorus fractions in liquid and solid phase were clarified and the release performance of different phosphorus fractions in solid related to ozone was also explored.The results indicate that the total phosphorus in liquid(TPL)was 38.26 mg·L^-1 when the ozone dosage was 0.15 g·g^-1,which is 29 times more than that before oxidation.The forms of phosphorus content and its proportion in total phosphorus(TPS)in solid sludge was basically the same during ozonation.The bio-available phosphorus increased with ozone dosage.The proportion of TPS increased from 73.60%in the original sludge to 86.27%with 0.15 g·g^-1 ozone,reaching 20.74 mg·g^-1 of P content.TPL in liquid was mainly from the destruction of extracellular polymer structure and the dissolution of phosphorus-containing substances,with a rate of 0.0324 g TPL of 1 g MLSS.
作者
刘艳芳
王凌霄
马骏
李宁
李再兴
LIU Yanfang;WANG Lingxia;MA Jun;LI Ning;LI Zaixing(School of Environmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018;School of Civil Engineering,Hebei University of Science and Technology,Shijiazhuang 050018;Pollution Prevention Biotechnology Laboratory of Hebei Privince,Shijiazhuang 050018)
出处
《环境科学学报》
CAS
CSCD
北大核心
2019年第9期3039-3044,共6页
Acta Scientiae Circumstantiae
基金
河北省重点研发计划自筹项目(No.17273612)
河北科技大学博士科研启动基金
关键词
剩余污泥
臭氧
释磷
磷形态
SMT法
excess sludge
ozone
phosphorus release
phosphorus forms
SMT
