厨余垃圾和污水污泥共消化的全流程碳中和潜力研究
CARBON NEUTRAL POTENTIAL OF WHOLE PROCESS OF CO-DIGESTION OF FOOD WASTE AND SLUDGE
李思 1袁辉洲 2柯水洲 1柳晓明2
作者信息
- 1. 湖南大学土木工程学院,长沙 410000
- 2. 深圳职业技术大学材料与环境工程学院,广东 深圳 518000
- 折叠
摘要
在我国积极推进碳中和的背景下,厨余垃圾(FW)与污泥共消化是一项具有潜力的低碳处理模式.然而,针对共消化对污水厂潜在环境影响的相关研究较为匮乏.此外,共消化上清液中氮含量较高,低碳工艺短程硝化厌氧氨氧化(PN/A)可实现低能耗和自养脱氮.因此,利用Biowin软件模拟了 FW和污泥共消化,并采用侧流PN/A处理上清液的处理方式,重点探究了 FW与污泥共消化的碳中和潜力和可持续性.结果表明:共消化的产甲烷量比FW单独消化高109.5％,系统整体能量回收提高1.3倍,碳中和率可达132.2％.敏感性分析显示,FW与污水厂结合实现碳中和的重要发展方向在于低能耗运行、高效能源资源回收.该研究旨在为构建面向碳中和的协同处理方式提供参考,为FW和污水污泥的可持续处理提供理论依据和实践支撑.
Abstract
In the context of China's active promotion of carbon neutrality,co-digestion of food waste(FW)and sludge is a potential low-carbon treatment model.However,few studies have been conducted on the potential effect of co-digestion on wastewater treatment plants.In addition,the nitrogen content in the co-digested supernatant is high,and the low-carbon process of partial nitrification and anammox(PN/A)allows for low energy consumption and autotrophic nitrogen removal.Therefore,the co-digestion process of food waste and sludge was introduced in this study,and the supernatant was subjected to sidestream PN/A treatment,focusing on the carbon neutral potential and sustainability of food waste and sludge co-digestion.The findings indicated that the methane production of co-digestion was 109.5％higher than that of food waste digestion alone,the system could enhance the overall energy recovery by 1.3 times and achieve a carbon neutral state rate of 132.2％.Additionally,sensitivity analysis highlighted that low-energy operation and efficient energy resource recovery are crucial directions for combining food waste and wastewater treatment to accomplish carbon neutrality.The objective of this study is to provide a reference for the establishment of carbon-neutral collaborative treatment models,and provide both theoretical groundwork and practical assistance for the sustainable treatment of food waste and sludge.
关键词
厨余垃圾/污水污泥/侧流PN/A/生命周期评价/能量平衡/碳中和潜力Key words
food waste/sewage sludge/sidestream PN/A/life cycle assessment/energy balance/carbon neutral potential引用本文复制引用
出版年
2024
NETL
NSTL
万方数据