高温热水解对高含固污泥中磷的形态转化影响  

Effects of high temperature thermal hydrolysis process on changes of phosphorus forms in high-solid sewage sludge

作　　者：周思琦 戴晓虎[1] 戴翎翎[1] 彭信子 刘志刚[1] ZHOU Si-qi;DAI Xiao-hu;DAI Ling-ling;PENG Xing-zi;LIU Zhi-gang(State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学环境科学与工程学院,污染控制与资源化研究国家重点实验室,上海200092

出　　处：《中国环境科学》2018年第4期1391-1396,共6页China Environmental Science

基　　金：上海市自然科学基金资助项目(15ZR1442900);国家“水体污染控制与治理”科技重大专项(2013ZX07315-003)

摘　　要：通过正交实验、单因素温度影响实验,利用SMT磷分级提取法研究了高温热水解后高含固污泥中磷的形态转化.结果表明,120℃~160℃的高温热水解可以将高含固污泥中14.80%以上的有机磷转化为无机磷,影响因素对无机磷/总磷的影响大小顺序为:热水解温度>热水解时间>氧化剂含量>pH值,随着温度的升高,高含固污泥中无机磷/总磷也从79.13%增加至95.87%;当热水解温度为160℃、时间为40min时,高含固污泥中无机磷含量由原泥的18.30mg/g增至20.49mg/g,无机磷/总磷由80.83%增至96.97%.结果为实现污泥中磷的回收利用奠定基础,同时为"高温热水解+高含固厌氧消化"工艺的优化提供新思路.Orthogonal experiment,single factor experiment(i.e.temperature),and standards,measurements,and testing(SMT)were used to explore changes of phosphorus forms in high-solid sewage sludge after high temperature thermal hydrolysis process(HTTHP).The experimental results showed that more than 14.80%of organic phosphorus(OP)was transformed into inorganic phosphorus(IP)in high-solid sewage sludge by the HTTHP at 120℃~160℃,and the order of influencing factors on IP/total phosphorus(TP)was as follows:temperature of HTTHP>time of HTTHP>oxidant content>pH.With the increase of temperature,IP/TP in high-solid sewage sludge increased from 79.13%to 95.87%.Further study indicated that under 160℃and 40min of HTTHP conditions,the IP and the IP/TP increased respectively from 18.30mg/g to 20.49mg/g and 80.83%to 96.97%.These findings,however,established foundation to realize the phosphorus recovery,and also provided an important reference for the optimization of high-solid anaerobic digestion of sewage sludge with HTTHP pretreatment.

关 键 词：高温热水解 磷形态 高含固污泥 无机磷 总磷 

分 类 号：X705[环境科学与工程—环境工程]