两级完全混合发酵工艺开发碳源试验研究  

Developing carbon resource with two-stage complete mixing ferment process

作　　者：任健[1,2] 李军[1] 周军[3] 张帅[1] 甘一萍[3] 

机构地区：[1]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124 [2]中冶京诚工程技术有限公司动力与水资源工程技术所,北京100176 [3]北京城市排水集团有限公司,北京100022

出　　处：《中国环境科学》2009年第12期1249-1254,共6页China Environmental Science

基　　金：国家自然科学基金资助项目(50678008);北京市教委资助项目(KM200510005006);北京市属市管高校人才强教计划资助项目(PHRIHLB)

摘　　要：采用两级完全混合发酵工艺进行碳源开发试验,研究了水力停留时间(HRT)和污泥停留时间(SRT)对工艺开发碳源效果的影响.研究表明,固定SRT为4d,污泥回流比为1,HRT在32～36h,系统出水的溶解性COD(SCOD)可维持在1090～1180mg/L,且浓缩池泥水分离效果较好,出水的SS保持在50～80mg/L.保持系统的HRT为32h,污泥回流比为1,SRT在4～7d时,可实现厌氧系统中产酸菌与产甲烷菌的分离,系统能够保持良好的产酸效果,此时系统出水的SCOD值基本稳定于980～1179mg/L.碱度可以作为衡量水解酸化系统是否有效运行的重要参数.HRT为32h,SRT为4d的工况下,初沉污泥酸化发酵系统对氨氮和磷的释放率分别为3.88mgN/gVSS和0.27mgP/gVSS.Two-stage complete mixing ferment process was used for developing carbon source. Influence of HRT and SRT on the ferment system were studied. Effective HRT of the process was between 32 to 36 h, when SRT was 4 d and sludge recycle rate was 1, average SCOD of effluents was in the range of 10901180 mg/L, while separation effect of the sludge thickener was very well, and MLSS of supernatant was in the range of 5080 mg/L; In the condition of HRT was 32 h and sludge recycle rate was 1, effective SRT of the process was in the range of 47d, and average SCOD of effluents was between 9801179 mg/L, acidogenic bacteria and methanogenic bacteria could be separated effectively. Alkalinity was an important parameter of the primary sludge ferment system. In the process of primary sludge hydrolysis and acidification, ammonia nitrogen and phosphorus would be released. In the conditions of HRT was 32 h and SRT was 4 d, the release rate of ammonia nitrogen and phosphorus were 3.88 mgN/gVSS and 0.27 mgP/gVSS.

关 键 词：碳源 水力停留时间(HRT) 污泥停留时间(SRT) 释放率 

分 类 号：X703[环境科学与工程—环境工程]