改性聚丙烯基缓释碳源耦合生物膜水质净化器的脱氮效能研究
Study on denitrification performance of modified polypropylene-based slow-release carbon source coupled with biofilm water purifier
张玲 1郝国兵 1李申 2戴苍松 3俞志敏 1张利兰 4邓呈逊 1刘晓薇1
作者信息
- 1. 合肥大学 生物食品与环境学院,安徽 合肥 230601;安徽省生物质(中德)国际联合研究中心,安徽 合肥 230601
- 2. 安徽久吾天虹环保科技有限公司,安徽 合肥 230088
- 3. 合肥万鲤锦环境科技有限公司,安徽 合肥 231299
- 4. 重庆大学 环境与生态学院,重庆 400044
- 折叠
摘要
固态缓释碳源逐渐成为提高低碳氮比(C/N)污水脱氮效能的有效方法.本研究制备了一种新型亲水改性多孔聚丙烯基缓释碳源材料(HEPP-C),并利用其作为生物填料构建生物膜水质净化器,对低C/N污水脱氮效能进行研究.结果表明:HEPP-C能够稳定持久地释碳;在间歇反硝化体系中,HEPP-C具有最高的脱氮效率,对NO-3-N和TN的去除率分别为 89.6%和 89.5%;连续流缓释碳源耦合生物膜净化体系中,HEPP-C缓释碳源能够显著提高NO-3-N和TN的去除效率,当进水NO-3-N含量低于 20 mg/L、水力停留时间为 12 h、曝气—停曝时间为 8h—4h时,出水TN浓度为 1.24 mg/L,低于地表水Ⅵ类水质标准值.可见,构建的HEPP-C基缓释碳源耦合生物膜水质净化器能够对低污染污水以及河湖水体实现有效脱氮.
Abstract
Solid slow-release carbon sources have gradually become an effective method to improve the denitrification efficiency of low carbon-to-nitrogen ratio(C/N)wastewater.We prepared a novel hydrophilically modified porous polypropylene-based slow-release carbon source material(HEPP-C).Utilizing it as a biological filler,we constructed a biofilm water purifier to study the denitrification efficiency of low C/N wastewater.HEPP-C exhibited a more stable and prolonged carbon release performance.In the intermittent denitrification system,HEPP-C achieved the highest denitrification efficiency,with removal rates of NO-3-N and TN being 89.6%and 89.5%,respectively.In the continuous-flow slow-release carbon source coupled with the biofilm purification system,the HEPP-C carbon source enhanced the removal efficiency of NO-3-N and TN notably.When the influent NO-3-N concentration was below 20 mg/L,with a hydraulic retention time of 12 h and an aeration-non-aeration cycle of 8 h—4 h,the effluent TN concentration after treatment was 1.24 mg/L,which is below the surface water quality standard of Class Ⅵ.Thus,the established HEPP-C based slow-release carbon source coupled with a biofilm water purifier can effectively denitrify low-contaminated wastewater and river/lake waters.
关键词
多孔聚丙烯/缓释碳源/低碳氮比/生物填料Key words
Porous polypropylene/slow-release carbon source/low carbon-to-nitrogen ratio/biofilm padding引用本文复制引用
基金项目
合肥市关键技术"借转补"研发项目(2021GJ062)
国家自然科学基金资助项目(52070063)
安徽省高等学校自然科学研究项目(KJ2021A1011)
出版年
2024
NETL
NSTL
万方数据