高温热水解对不同含固率低有机质污泥溶出规律影响

江丽华; 卓桂华; 何雨恒; 杨淑贵; 林鸿; 郑育毅

doi:10.13205/j.hjgc.202305001

高温热水解对不同含固率低有机质污泥溶出规律影响

doi: 10.13205/j.hjgc.202305001

江丽华^1,2,
卓桂华³,
何雨恒⁴,
杨淑贵⁴,
林鸿⁵,
郑育毅^1,2, ,

1. 福建师范大学环境与资源学院碳中和现代产业学院福建省污染控制与资源循环利用重点实验室, 福州 350007;
2. 城市废物资源化技术与管理福建省高校工程研究中心, 福州 350007;
3. 福建省环境科学研究院, 福州 350013;
4. 福建师范大学地理科学学院碳中和未来技术学院, 福州 350007;
5. 福建省金皇环保科技有限公司, 福州 350002

基金项目:

福建省科技厅对外合作项目(2021I0010)

福建省科技厅公益类项目(2019R1015-1)

福建省科技厅计划项目(2020N5015)

详细信息

作者简介:
江丽华(1997-),女,硕士研究生,主要研究方向为固废资源化利用。1375693428@qq.com

通讯作者:
郑育毅(1974-),男,博士研究生,教授级高工,主要研究方向为固废资源化利用。yuyi_1974@sina.com

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出版历程
- 收稿日期: 2022-04-26

INFLUENCE OF THERMOPHILIC HYDROLYSIS PRETREATMENT ON PHYSICOCHEMICAL PROPERTIES OF SOLUBILIZATION FROM LOW-ORGANIC-MATTER SLUDGE WITH DIFFERENT SOILD CONTENTS

JIANG Lihua^1,2,
ZHUO Guihua³,
HE Yuheng⁴,
YANG Shugui⁴,
LIN Hong⁵,
ZHENG Yuyi^{1,2
, ,}

1. Fujian Key Laboratory of Pollution Control and Resource Reuse, College of Carbon Neutral Modern Industry, College of Environmental and Resource Sciences, Fujian Normal University, Fuzhou 350007, China;
2. Fujian College and University Engineering Research Center for Municipal (Solid) Waste Resourcization and Management, Fuzhou 350007, China;
3. Fujian Academy of Environmental Sciences, Fuzhou 350013, China;
4. School of Carbon Neutrality Future Technology, School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China;
5. Fujian Jinhuang Environmental Science Technology Co., Ltd, Fuzhou 350002, China

摘要

摘要: 高温热水解是促进低有机质污泥厌氧水解过程的有效方法,探讨不同含固率下低有机质污泥高温热水解后物质溶出规律,可为实现其高效厌氧发酵提供基础理论依据。通过序批式实验和相关性分析研究了含固率、温度和时间对高温热水解污泥中物质溶出的影响。结果表明:污泥中物质溶出特性与温度、含固率的相关性均较高(P=0.272~0.757,0.249~0.774)。除含固率6%的污泥外,8%、10%及12%含固率污泥中可溶糖、可溶蛋白质、总挥发性脂肪酸(TVFA)、溶解性有机碳(SOC)浓度随处理温度提高而增大,而pH则相反。除含固率的8%污泥外,氨氮(NH₄⁺-N)和游离氨(FAN)浓度亦随含固率、热水解温度的提高而增大。当处理温度相同时,可溶糖、可溶蛋白质、TVFA、SOC、NH₄⁺-N、FAN浓度总体上随含固率的升高而升高,而含固率变化对pH无显著影响。同时,含固率6%~10%的污泥中可溶蛋白质的溶出率高于可溶糖,随着含固率的增加,可溶蛋白质溶出率增幅有所降低;含固率为6%和12%时,TVFA增加不明显;SOC与SCOD的变化规律一致,主要取决于可溶蛋白质溶出浓度的变化。
- 含固率 /
- 高温热水解 /
- 低有机质 /
- 污泥 /
- 有机物溶出
Abstract: Thermophilic hydrolysis pretreatment is an effective method to promote anaerobic hydrolysis of low organic matter sludge, and exploring the leaching pattern of low organic matter sludge after thermophilic hydrolysis pretreatment at different solid contents can provide a basic theoretical basis for its efficient anaerobic fermentation. The effects of solid contents (SC), temperature and time on the solubilization of substances from thermophilic hydrolysis sludge were investigated by sequential batch experiments and correlation analysis. The results showed that the sludge solubilization physicochemical characteristics are highly correlated with thermophilic hydrolysis temperature and SC(P=0.272~0.757,0.249~0.774). The concentration of soluble carbohydrates, soluble proteins, total volatile fatty acids (TVFA) and soluble organic carbon (SOC) in sludge at 8%, 10% and 12% SC increased with the increase of treatment temperature, with the exception of sludge at 6% SC, while the case for pH was opposite. In addition to the 8% SC, the concentration of ammonia nitrogen (NH₄⁺-N) and free ammonia (FAN) also increased with the increase of solid and thermal hydrolysis temperature. But when at the same pretreatment temperature, the concentrations of soluble carbohydrates, soluble proteins, TVFA, SOC, NH₄⁺-N and FAN also rose with SC on the whole, while we found that SC had no significant influence on pH. Meanwhile, the solubilization rate of proteins was higher than carbohydrates when the solids content was 6%~10%, and the solubilization rate augmentation of soluble protein decreased with the increased of SC. While at 6% or 12% SC, the solubilization rate of TVFA increased insignificantly, and the changes of SOC was consistent with soluble chemical oxygen demand(SCOD), whose value was mostly dependent on the concentration of soluble proteins.
- solid content /
- thermophilic hydrolysis /
- low-organic-matter /
- sludge /
- solubilization of organic matter

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