生态环境学报2017，Vol.26Issue(4)：676-680,5.DOI:10.16258/j.cnki.1674-5906.2017.04.019
基于碳源回用目标的剩余污泥水解酸化产物调控研究
Study on the Products Regulation of Waste Activated Sludge Hydrolytic Acidification Based on Carbon Source Recycling
摘要
Abstract
Products of waste activated sludge (WAS) hydrolytic acidification such as volatile fatty acids (VFAs) can be used as supplementary carbon sources for treatment of municipal wastewater with a low C/N ratio. However, it is difficult to accumulate sufficient VFAs and other useful carbon source products from WAS hydrolytic acidification due to methanogenesis. In addition, the extremely high nitrogen and phosphorus contents in the recycling liquid from the hydrolytic acidification process further increases the nitrogen and phosphorus load of municipal wastewater treatment plant (WWTP). Based on the carbon source recycling target, BES (2-Bromoethanesulfonic acid sodium) and CaO2 were added to WAS hydrolytic acidification process to investigate the accumulation of SCOD and VFAs, as well as the decrease of nitrogen and phosphorus. The results showed that after NaOH hot-alkali pretreatment, the addition of BES can improve the accumulation of SCOD and VFAs efficiently at the WAS hydrolytic acidification process, the maximum mass concentrations of SCOD and VFAs were 6169.8 mg·L-1and 1335.0 mg·L-1, which were 66.7% and 195.2% higher respectively than that of the control. Acetic acid mass fractions in VFAs reached to 66.0%. Compared with the control, the removal rates of nitrogen and phosphorus were reduced by 59.6% and 65.7% respectively when CaO2 was added, and the final mass concentrations were only 200.7 mg·L-1, 9.6 mg·L-1in reactors. Combination of BES and CaO2 can effectively promote the accumulation of SCOD and VFAs and the reduction of nitrogen and phosphorous at the WAS hydrolytic acidification process. The products of WAS hydrolytic acidification can be used as carbon source for treatment of municipal wastewater denitrification and phosphorus removal system with a low C/N ratio and to realize sludge recycling.关键词
剩余污泥/水解酸化/挥发性脂肪酸/产物调控/资源化利用Key words
waste activated sludge/hydrolysis acidification/volatile fatty acid/products regulation/recycling分类
资源环境引用本文复制引用
李平,朱凤霞,王丽苹,王苏女,于可可,吴锦华,胡勇有..基于碳源回用目标的剩余污泥水解酸化产物调控研究[J].生态环境学报,2017,26(4):676-680,5.基金项目
广州市科技计划项目(2014Y2-00522) （2014Y2-00522）
广东省应用型科技研发专项资金项目(2016B020240005) （2016B020240005）
广州市产学研协同创新重大专项(201604020055) （201604020055）
