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

JIANG Lihua; ZHUO Guihua; HE Yuheng; YANG Shugui; LIN Hong; ZHENG Yuyi

doi:10.13205/j.hjgc.202305001

Volume 41 Issue 5

May 2023

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JIANG Lihua, ZHUO Guihua, HE Yuheng, YANG Shugui, LIN Hong, ZHENG Yuyi. INFLUENCE OF THERMOPHILIC HYDROLYSIS PRETREATMENT ON PHYSICOCHEMICAL PROPERTIES OF SOLUBILIZATION FROM LOW-ORGANIC-MATTER SLUDGE WITH DIFFERENT SOILD CONTENTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(5): 1-7,38. doi: 10.13205/j.hjgc.202305001

Citation:

JIANG Lihua, ZHUO Guihua, HE Yuheng, YANG Shugui, LIN Hong, ZHENG Yuyi. INFLUENCE OF THERMOPHILIC HYDROLYSIS PRETREATMENT ON PHYSICOCHEMICAL PROPERTIES OF SOLUBILIZATION FROM LOW-ORGANIC-MATTER SLUDGE WITH DIFFERENT SOILD CONTENTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(5): 1-7,38. doi: 10.13205/j.hjgc.202305001

Citation:

JIANG Lihua, ZHUO Guihua, HE Yuheng, YANG Shugui, LIN Hong, ZHENG Yuyi. INFLUENCE OF THERMOPHILIC HYDROLYSIS PRETREATMENT ON PHYSICOCHEMICAL PROPERTIES OF SOLUBILIZATION FROM LOW-ORGANIC-MATTER SLUDGE WITH DIFFERENT SOILD CONTENTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(5): 1-7,38. doi: 10.13205/j.hjgc.202305001

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

doi: 10.13205/j.hjgc.202305001

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

Received Date: 2022-04-26

Abstract

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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References(32)

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