[1]孙宇佳,徐志嫱,关帅,等.热与碱热预处理对高含铁污泥甲烷产率的影响[J].中国给水排水,2025,41(9):116-122.
　SUNYu-jia,XUZhi-qiang,GUANShuai,et al.Effect of Thermal and Alkali-Thermal Pretreatments on Methane Yield from High-iron-content Sludge[J].China Water & Wastewater,2025,41(9):116-122.
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热与碱热预处理对高含铁污泥甲烷产率的影响

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第9期 页码: 116-122 栏目: 出版日期: 2025-05-01
Title:
Effect of Thermal and Alkali-Thermal Pretreatments on Methane Yield from High-iron-content Sludge
作者:
孙宇佳1,2， 徐志嫱1,2， 关帅1,3， 于汇洋1， 张卓1,2， 刘博1,2， 董雯1,2， 王辉1,2
（1.西安理工大学 西北旱区生态水利国家重点实验室，陕西 西安 710048；2.西安理工大学 水利水电学院，陕西 西安 710048；3.西安西热水务环保有限公司，陕西 西安 710054）
Author(s):
SUN　Yu-jia1，2， XU　Zhi-qiang1，2， GUAN　Shuai1，3， YU　Hui-yang1， ZHANG　Zhuo1，2， LIU　Bo1，2， DONG　Wen1，2， WANG　Hui1，2
（1. State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China， Xi’an University of Technology， Xi’an 710048， China； 2. College of Water Resources and Hydropower， Xi’an University of Technology， Xi’an 710048， China； 3. Xi’an TPRI Water-Management & Environment Protection Co. Ltd.， Xi’an 710054， China）
关键词:
高含铁污泥;  碱热预处理;  甲烷产率;  古菌群落
Keywords:
high-iron-content sludge;  alkali-thermal pretreatment;  methane production efficiency;  archaeal community
摘要:
针对污水处理过程中添加大量铁盐进行化学除磷和调理导致污泥厌氧消化产气效能受到抑制的问题，对污泥实施热和碱热预处理，分析不同预处理方法对高含铁污泥厌氧消化产气效能的影响。结果表明，高含铁污泥［铁含量为（24.24±0.11） g/kg］累计产甲烷量比生物污泥［铁含量为（6.63±0.13） g/kg］降低了14.96%。经热和碱热预处理后，高含铁污泥的累计产甲烷量分别提高了40.25%和72.70%，且碱热预处理后最大产甲烷势（Um）和水解速率常数（khyd）提升幅度最大。高含铁污泥经碱热预处理后释放出的多糖（SC）是热预处理的1.61倍，残渣中腐殖酸的增长率较热预处理提高了5.86%。此外，在碱热预处理系统中，与产甲烷相关的古菌属的相对丰度和辅酶F420活性比热预处理分别提高了5.29%和4.23%。因此，碱热预处理更有利于改善高含铁污泥的产气效能并提高残渣的稳定性。
Abstract:
The addition of a substantial quantity of iron salts for chemical phosphorus removal and sludge conditioning in sewage treatment process can suppress the gas production efficiency during anaerobic sludge digestion. In this study, thermal and alkaline-thermal pretreatments of sludge were conducted to analyze the impacts of pretreatment methods on the gas production efficiency of anaerobic digestion of high-iron-content sludge. The cumulative methane production from high-iron-content sludge with iron content of (24.24±0.11) g/kg on a dry basis was 14.96% lower than that from biological sludge with iron content of (6.63±0.13) g/kg on a dry basis. After undergoing thermal and alkali-thermal pretreatments, the cumulative methane production of high-iron-content sludge increased by 40.25% and 72.70%, respectively. Furthermore, the maximum methane production potential (Um) and hydrolysis rate constant (khyd) exhibited the most significant enhancement following the alkali-thermal pretreatment. The yield of soluble carbohydrates (SC) released by alkali-thermal pretreatment was 1.61 times higher than that achieved by thermal pretreatment alone. Additionally, the growth rate of humic acid in sludge following alkali-thermal pretreatment was 5.86% greater compared to thermal pretreatment. In addition, the relative abundance of methanogenic archaea increased by 5.29%, and the activity of coenzyme F420 increased by 4.23% in the alkali-thermal pretreatment system. Therefore, alkali-thermal pretreatment is more advantageous for enhancing the gas production efficiency and ensuring the stability of sludge with high iron content.
更新日期/Last Update: 2025-05-01