气液射流搅拌工艺在餐厨垃圾厌氧发酵工程的应用研究  

Application Study of Gas-liquid Jet Stirring Technology in Anaerobic Digestion Engineering of Kitchen Waste

作　　者：许家辉 刘超 乐亮亮 苏醒 陈卫华 吴健 XU Jiahui;LIU Chao;LE Liangliang;SU Xing;CHEN Weihua;WU Jian(Shanghai Pudong Development(Group)Co.Ltd.,Shanghai 200127;Shanghai Liming Resources Reuse Co.Ltd.,Shanghai 201209)

机构地区：[1]上海浦东发展(集团)有限公司,上海200127 [2]上海黎明资源再利用有限公司,上海201209

出　　处：《环境卫生工程》2025年第1期78-84,共7页Environmental Sanitation Engineering

摘　　要：餐厨垃圾厌氧发酵过程中增加搅拌在一定程度上可以提高厌氧发酵有机负荷以及产沼气效率。常用的机械搅拌工艺可以实现对厌氧消化罐中的搅拌过程,但存在运行能耗大、搅拌不充分、日常运营维护难度大、无法粉碎大颗粒及纤维类物质等缺点。在厌氧消化过程中创新性地利用气液混合射流搅拌代替机械搅拌技术,在避免上述问题的同时,还增强了厌氧发酵罐中的混合效果和发酵沼气产量,并成功在餐厨垃圾厌氧发酵工程中稳定运行超过1 a。在餐厨垃圾厌氧发酵罐中,气液混合射流搅拌可以增大餐厨垃圾浆料单日产气量,且生成沼气中CH_4含量提高约9%,同时还能提高吨浆料产气量约30%以及使沼气产率(以VS计)提高约18%。从浆料混合程度、设备投资、安装运行维护的难易程度、处理能力以及节能降耗等方面分析结果来看,气液混合射流搅拌具有明显的工程应用优势。The process of anaerobic fermentation of kitchen waste can be enhanced to some extent by increasing the stirring process,which improves the organic loading of anaerobic fermentation and the efficiency of biogas production.Common mechanical stirring processes can accomplish the stirring within the anaerobic digestion tanks,but they also have several drawbacks,such as high operational energy consumption,insufficient stirring,the difficulty of daily operation and maintenance,as well as the inability to break down large particles and fibrous materials.By introducing an innovative gas-liquid mixed jet stirring technology to replace the mechanical stirring process in the anaerobic digestion process,not only the aforementioned issues could be avoided,but also the mixing effect and biogas yield within the anaerobic fermentation tanks were enhanced.This technology has been successfully and stably operated in the anaerobic fermentation project of kitchen waste for over a year.In the anaerobic fermentation tanks of kitchen waste,the gas-liquid mixed jet stirring could enhance the daily biogas production of the kitchen waste slurry and increase the CH4 content in the biogas by about 9%.At the same time,it could also increase the biogas yield per ton of slurry by about 30%and improve the biogas production rate by about 18%.From the analysis results of slurry mixing degree,equipment investment,ease of installation,operation and maintenance,treatment capacity,energy saving and consumption reduction,the gas-liquid mixed jet stirring has obvious advantages in engineering application.

关 键 词：气液射流搅拌 机械搅拌 厌氧发酵 餐厨垃圾 

分 类 号：X799.3[环境科学与工程—环境工程]