郑州新区污水处理厂污泥消化干化技术的应用  

Application of Sludge Digestion and Drying Technology in Zhengzhou New District WWTP

作　　者：施祖辉 叶心彤 张艳 曹鑫莉 SHI Zu‑hui;YE Xin‑tong;ZHANG Yan;CAO Xin‑li(Shanghai Municipal Engineering Design InstituteCo.Ltd.,Shanghai 200092,China;Zhongyuan Environmental Protection Co.Ltd.,Zhengzhou 450018,China)

机构地区：[1]上海市政工程设计研究总院<集团>有限公司,上海200092 [2]中原环保股份有限公司,河南郑州450018

出　　处：《中国给水排水》2024年第16期116-120,共5页China Water & Wastewater

摘　　要：郑州新区污水处理厂污泥处理采用浓缩-脱水-消化-干化工艺,污泥消化规模为200 tDS/d,干化规模为300 t/d(污泥含水率按80%计),建成至今,消化、干化系统均运行稳定,产气率高。该系统根据功能定位,可分为污泥处理、污泥气利用、热量回收利用三部分。污泥经厌氧消化后产生沼气,沼气燃烧得到的热能用来干化消化后的剩余污泥;干化产生的高温尾气通过热能回收,用来提供维持厌氧需要的能量。最终得到含水率30%以下的干化污泥,外运处置利用,实现了系统的能量平衡,并为碳减排作出贡献。The sludge treatment process of Zhengzhou New District wastewater treatment plant(WWTP)includes thickening,dewatering,digestion and drying.The sludge digestion capacity is 200 tDS/d and the drying capacity is 300 t/d(80%sludge water content),which have been running stably with high gas production rate since its completion.According to the function orientation,the system is divided into 3 major systems,such as sludge treatment,biogas utilization and heat recovery system.After anaerobic digestion of sludge,biogas is produced,and the heat energy obtained from the combustion of biogas is used to dry the remaining sludge after digestion.The high‑temperature exhaust gas produced by drying is used to provide the energy needed to maintain the anaerobic temperature through heat recovery.The final dried sludge with less than 30%water content is obtained and shipped out for disposal and utilization,achieving the energy balance of the system and contributing to carbon emission reduction.

关 键 词：郑州新区污水处理厂 污泥消化干化 厌氧消化 沼气 

分 类 号：TU992[建筑科学—市政工程]