EFFECT OF INITIAL pH VALUE ON METHANE PRODUCTION FROM RESIDUE AFTER ANAEROBIC CO-FERMENTATIVE HYDROGEN PRODUCTION OF SEWAGE SLUDGE AND FOOD WASTE UNDER THERMOPHILIC OPERATION

CAO Qi; HE Yu-heng; ZHUO Gui-hua; LIU Chang-qing; CHEN Jian-yong; ZHENG Yu-yi

doi:10.13205/j.hjgc.202209020

Volume 40 Issue 9

Nov. 2022

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CAO Qi, HE Yu-heng, ZHUO Gui-hua, LIU Chang-qing, CHEN Jian-yong, ZHENG Yu-yi. EFFECT OF INITIAL pH VALUE ON METHANE PRODUCTION FROM RESIDUE AFTER ANAEROBIC CO-FERMENTATIVE HYDROGEN PRODUCTION OF SEWAGE SLUDGE AND FOOD WASTE UNDER THERMOPHILIC OPERATION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(9): 150-157. doi: 10.13205/j.hjgc.202209020

Citation:

CAO Qi, HE Yu-heng, ZHUO Gui-hua, LIU Chang-qing, CHEN Jian-yong, ZHENG Yu-yi. EFFECT OF INITIAL pH VALUE ON METHANE PRODUCTION FROM RESIDUE AFTER ANAEROBIC CO-FERMENTATIVE HYDROGEN PRODUCTION OF SEWAGE SLUDGE AND FOOD WASTE UNDER THERMOPHILIC OPERATION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(9): 150-157. doi: 10.13205/j.hjgc.202209020

Citation:

CAO Qi, HE Yu-heng, ZHUO Gui-hua, LIU Chang-qing, CHEN Jian-yong, ZHENG Yu-yi. EFFECT OF INITIAL pH VALUE ON METHANE PRODUCTION FROM RESIDUE AFTER ANAEROBIC CO-FERMENTATIVE HYDROGEN PRODUCTION OF SEWAGE SLUDGE AND FOOD WASTE UNDER THERMOPHILIC OPERATION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(9): 150-157. doi: 10.13205/j.hjgc.202209020

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EFFECT OF INITIAL pH VALUE ON METHANE PRODUCTION FROM RESIDUE AFTER ANAEROBIC CO-FERMENTATIVE HYDROGEN PRODUCTION OF SEWAGE SLUDGE AND FOOD WASTE UNDER THERMOPHILIC OPERATION

doi: 10.13205/j.hjgc.202209020

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

Received Date: 2022-03-11
Available Online: 2022-11-09

Abstract

Abstract

Simultaneously producing hydrogen and methane via sewage sludge and food waste anaerobic co-digestion, widely regarded as one of the promising methods for renewable energy, plays an important role in carbon emission reduction. This study explored the effect of different initial pH values on the methane production from the residue from anaerobic co-fermentative hydrogen production of sewage sludge and food waste through batch experiments under thermophilic operation(55±1)℃. The results showed that properly increasing the alkalinity of the initial substrate of residue from hydrogen production improved methanogenic performance, while the initial pH=6 inhibited methane production. The highest value of maximum methane concentration(79.08%), cumulative methane yield(101 mL/g DS), and maximum methane production rate(12.21 mL/d) were all found in the test group of initial pH=8. The degradation ratios of total carbohydrate and total protein with different initial pH values were positively correlated with the cumulative methane yield. And total carbohydrate and total protein degradation were also the highest at initial pH=8, with values of 6078 mg/L~55.70% and 4710 mg/L~69.67%, respectively. Among these, the degradation rate of total protein was higher than total carbohydrate. Meanwhile, the pH value after digestion from different initial pH values tended to be 7.5 or so.
- residue of hydrogen production,
- methane production,
- initial pH,
- anaerobic digestion,
- thermophilic

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References(48)

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