高温条件下初始pH值对污泥-餐厨垃圾联合厌氧发酵产氢余物产CH<sub>4</sub>的影响

曹麒; 何雨恒; 卓桂华; 刘常青; 陈建勇; 郑育毅

doi:10.13205/j.hjgc.202209020

高温条件下初始pH值对污泥-餐厨垃圾联合厌氧发酵产氢余物产CH₄的影响

doi: 10.13205/j.hjgc.202209020

曹麒^1,2,
何雨恒³,
卓桂华⁴,
刘常青^3,2, ,,
陈建勇¹,
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. 福建师范大学地理科学学院碳中和未来技术学院, 福州 350007;
3. 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;
4. 福建省环境科学研究院, 福州 350013

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:
曹麒(1998-),女,研究生在读,主要研究方向为固体废物处理与资源化。481781214@qq.com

通讯作者:
刘常青(1970-),女,博士,副教授,主要研究方向为固体废物处理与资源化。mylcq@126.com

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出版历程
- 收稿日期: 2022-03-11
- 网络出版日期: 2022-11-09

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

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

摘要

摘要: 污泥-餐厨垃圾厌氧消化产氢产CH₄可将城市有机废弃物转化为可再生能源H₂、CH₄,对实现碳减排发挥着重要作用。通过批式试验探究高温条件下(55±1℃),不同初始pH值对污泥和餐厨垃圾联合厌氧发酵产氢余物产CH₄的影响。研究结果表明:适度地增加产氢余物的碱度会提高产CH₄效能,而过低的初始pH则抑制了产氢余物产CH₄效能。初始pH=8时,CH₄最高浓度(79.08%)、累积产甲烷量(101 mL/g DS)和最大CH₄生产速率(12.21 mL/d)均达到最大。不同初始pH下,总糖和总蛋白质的降解量跟累积产甲烷量呈正相关,其中总蛋白的降解量及降解率均高于总糖。初始pH=8时,总糖和总蛋白质的降解量及降解率最高,分别为6078 mg/L、55.70%和4710 mg/L、69.67%。不同初始pH值下,产氢余物厌氧消化后的pH都趋于7.5左右。
- 产氢余物 /
- 产CH₄ /
- pH值 /
- 厌氧消化 /
- 高温
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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