环境工程学报2018，Vol.12Issue(3)：931-938,8.DOI:10.12030/j.cjee.201710003
混合碱和沸石联用对初沉污泥厌氧发酵性能的影响
Effect of combined use of alkali and zeolite on anaerobic fermentation performance of primary sludge
摘要
Abstract
During the anaerobic fermentation process of primary sludge,although NaOH using as alkaline agent to adjust the sludge pH could effectively improve the organic concentration in the fermented broth,it resulted in increasing concentrations of the byproducts such as nitrogen and phosphorus,and poor dewatering performance of fermented sludge.To solve these problems,a series of lab-scale experiments were conducted to investigate the effects of the combined use of the NaOH/Ca(OH)2 blended system and zeolite on the fermented broth characteristic and the sludge dewatering performance.The results indicated that intensifying fermentation,generation control of nitrogen and phosphorus,and excellent dewatering performance of fermented sludge could be acheieved when primary sludge pH was kept at 10 by dosing the mixed alkaline with the NaOH to Ca(OH)2 volume ratio of 1 ∶ 3,and the dosage of zeolite added simultaneously was 80 g·L-1.Under this condition,the corres-ponding concentrations of TVFA,SCOD,NH4+-N,and PO43--P were 2 898.1,4 960,106.1,3.1 mg·L-1,respectively,indicating great potential as the carbon source for denitrification.And the fermented sludge with the CST value of 273.9 s exhibited good dewatering performance,resulting in the benefit to the follow-up treatment.关键词
初沉污泥/混合碱调节/沸石/厌氧发酵/脱水性能Key words
primary sludge/mixed alkali adjustment/zeolite/anaerobic fermentation/dewatering performance分类
资源环境引用本文复制引用
冯洋洋,杨跃,王宏杰,董文艺,黄潇,单则霖..混合碱和沸石联用对初沉污泥厌氧发酵性能的影响[J].环境工程学报,2018,12(3):931-938,8.基金项目
国家水体污染控制与治理科技重大专项(2015ZX07306001-04) （2015ZX07306001-04）
