环境工程学报2024，Vol.18Issue(3)：696-708,13.DOI:10.12030/j.cjee.202310163
利用工业园区酒糟固废制备复合缓释碳源及其性能评估
Preparation of composite slow-release carbon source from industrial park vinasse solid waste and its performance evaluation
摘要
Abstract
The ratio of carbon to nitrogen(C/N)in influent of wastewater treatment plants of industrial parks in China is generally too low to denitrification,and supplementary carbon sources are often required to improve the nitrogen removal performance.Vinasse solid waste is rich in organic components such as proteins and carbohydrates,which have a good biodegradability.However,there is still a lack of research on its use as a slow-release carbon source.In this study,vinasse solid waste from an industrial park was used as raw material,and polyvinyl alcohol(PVA)and sodium alginate(SA)were used as hybrid scaffold to prepare a slow-release carbon source by the low-temperature freeze chemical cross-linking method.The carbon release and denitrification performance of the material were evaluated.Results showed that the optimization of hybrid scaffold ratio and emulsifier dosage could extend the rapid release period of the slow-release carbon source to 3 d.At this stage,the process of carbon release was governed by the framework dissolution mechanism.The cumulative carbon release of the slow-release carbon source(measured by chemical oxygen demand,COD)was 1 089 mg·(g·L)-1.The optimal slow-release carbon source was prepared under the conditions of 10 g·L-1 vinasse solid waste,PVA∶SA ratio of 8∶1,and 1.0％span80 as emulsifier.During the denitrification process,at slow-release carbon source dosage of 0.19 g·L-1 and(41.53±0.1)mg·L-1 of initial nitrate nitrogen(NO3--N),the dissolved organic matter(DOM)of the effluent presented the highest humification degree,the lowest molecular weight,and the least aromatic ring substituent types and degree.The total nitrogen removal rate was 99.2％,and the denitrification rate reached 4.08 mg·(L·h)-1.This study could provide a reference for the collaborative management of wastewater and solid waste in industrial parks.关键词
缓释碳源/骨架材料/酒糟/释碳机制/反硝化Key words
slow-release carbon source/hybrid scaffold/vinasse/carbon release mechanisms/denitrification分类
资源环境引用本文复制引用
李亚南,何友文,刘遇瑶,王元月,佟娟,魏源送..利用工业园区酒糟固废制备复合缓释碳源及其性能评估[J].环境工程学报,2024,18(3):696-708,13.基金项目
横向课题资助项目(工业废水处理补充碳源的制备与应用技术研究-20210132) （工业废水处理补充碳源的制备与应用技术研究-20210132）
