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

作　　者：李亚南 何友文 刘遇瑶 王元月 佟娟[2,5,6] 魏源送 LI Yanan;HE Youwen;LIU Yuyao;WANG Yuanyue;TONG Juan;WEI Yuansong(College of Resources and Environment,Nanchang University,Nanchang 330031,China;Water Pollution Control Laboratory,Ecological Environment Research Centre,Chinese Academy of Sciences,China,Beijing 100085,China;China Energy Conservation and Environmental Protection Investment Development(Jiangxi)Co,Nanchang 330096,China;China Energy Conservation Engineering&Technology Research Institute Co,Beijing 100082,China;State Key Joint Laboratory of Environmental Simulation and Pollution Control,Ecological and Environmental Research Centre,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]南昌大学资源与环境学院,南昌330031 [2]中国科学院生态环境研究中心水污染控制实验室,北京100085 [3]中节能环保投资发展(江西)有限公司,南昌330096 [4]中节能工程技术研究院有限公司,北京100082 [5]中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室,北京100085 [6]中国科学院大学,北京100049

出　　处：《环境工程学报》2024年第3期696-708,共13页Chinese Journal of Environmental Engineering

基　　金：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)。

摘　　要：我国工业园区污水厂进水碳氮比(C/N)普遍较低,常需补充碳源以提高脱氮效果。酒糟富含蛋白质、碳水化合物等有机组分,可生物利用性好,但目前缺乏其作为缓释碳源的研究。本研究以工业园区酒糟固废为原材料,以聚乙烯醇(PVA)、海藻酸钠(SA)为骨架材料,利用低温冷冻化学交联法制备复合缓释碳源,并进行释碳性能和反硝化性能评估。结果表明:通过骨架材料配比以及乳化剂优化研究,缓释碳源的快速释放期可延长到3 d,此阶段释碳过程为骨架溶蚀机制,单位质量缓释碳源的累积释碳量(以化学需氧量,即COD计)可达到1089 mg·(g·L)^(-1)。在酒糟用量为10 g·L^(-1),骨架材料配比为PVA:SA=8:1,乳化剂为1.0%span80条件下制备的缓释碳源在投加量为0.19 g·L^(-1),初始硝态氮(NO_(3)^(-)-N)为(41.53±0.1)mg·L^(-1)时,反硝化出水溶解性有机物(DOM)的腐殖化程度最低、分子质量最小、芳香环取代基种类和取代基程度最低,总氮去除率为99.2%,反硝化速率达到4.08 mg·(L·h)^(-1),为最佳缓释碳源。本研究结果可为工业园区的污水-固废协同治理提供参考。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 1089 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(NO_(3)^(-)-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 

分 类 号：X703[环境科学与工程—环境工程]