化工进展2023，Vol.42Issue(12)：6609-6619,11.DOI:10.16085/j.issn.1000-6613.2023-0118
热-碱渣预处理强化炼厂剩余活性污泥厌氧消化性能
Enhanced anaerobic digestion of refinery waste activated sludge using thermal-refinery spend caustic pretreatment
摘要
Abstract
Thermal-alkaline pretreatment is an effective method to improve the anaerobic digestion of waste activated sludge.In order to reduce the cost of treatment process,the refinery spend caustic(RSC)was used instead of fresh alkalis,and the effects of thermal-RSC pretreatment on anaerobic digestion of refinery waste activated sludge(RWAS)were investigated.The results showed that thermal-alkaline pretreatment significantly promoted the solubilization of RWAS,and the concentrations of proteins,polysaccharides and volatile fatty acids(VFA)increased with temperature and RSC dosage increasing,which were 1338.7mg/L,510.9mg/L and 651.2mg/L at 90℃with 4%RSC,respectively.Person correlation analysis showed that RSC dosage was positively correlated with fluorescence intensity of humic acids and melanoid production,while had a significantly positive correlation with the stagnation period of anaerobic digestion,which resulted in an inhibition of RWAS anaerobic digestion within high RSC dosages.Eventually,the combination of high temperature and low alkali(90℃,1%RSC)was preferred.Under this condition,the SCOD degradation rate and maximum VFA production of RWAS by anaerobic digestion were 66%and 736.2mg/L,respectively.The methane(95.3mL/g-VS)and hydrogen(11.5mL/g-VS)production increased 5-fold and 3-fold compared to untreated sludge.Therefore,RWAS anaerobic digestion using thermal-RSC pretreatment has high application potential.关键词
剩余活性污泥/炼厂碱渣/预处理/厌氧消化/甲烷Key words
waste activated sludge/refinery spend caustic/pretreatment/anaerobic digestion/methane分类
资源环境引用本文复制引用
李晋,梁家豪,马文峰,郭绍辉,王庆宏,陈春茂..热-碱渣预处理强化炼厂剩余活性污泥厌氧消化性能[J].化工进展,2023,42(12):6609-6619,11.基金项目
国家重点研发计划(2018YFC1801903-01) （2018YFC1801903-01）
国家自然科学基金(22278434) （22278434）
中石油集团前瞻基础研究专项(2021DJ6605) （2021DJ6605）
茂名市科技专项资金项目(2022S041) （2022S041）
广东石油化工学院人才引进项目(RC-XJ2022000702) （RC-XJ2022000702）
东营市科学发展基金(DJB202104). （DJB202104）
