pH对果蔬、园林垃圾混合厌氧水解产酸的影响

杨梦; 蒋建国; 徐一雯; 刘诺

doi:10.13205/j.hjgc.202205015

pH对果蔬、园林垃圾混合厌氧水解产酸的影响

doi: 10.13205/j.hjgc.202205015

杨梦¹,
蒋建国^1, ,,
徐一雯²,
刘诺³

1. 清华大学环境学院, 北京 100084;
2. 中国城市建设研究院有限公司, 北京 100029;
3. 同济大学环境科学与工程学院, 上海 200092

详细信息

作者简介:
杨梦(1994-),女,硕士,主要研究方向为有机废弃物厌氧水解技术。yang-m16@mails.tinghua.edu.cn

通讯作者:
蒋建国(1970-),男,教授,主要从事固体废物处理与资源化利用研究。jianguoj@mail.tsinghua.edu.cn

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出版历程
- 收稿日期: 2021-05-20
- 网络出版日期: 2022-07-02

EFFECT OF pH ON ANAEROBIC HYDROLYSIS ACIDIFICATION STAGE OF FRUIT AND VEGETABLE WASTES AND GARDEN WASTES

1. School of Environment, Tsinghua University, Beijing 100084, China;
2. China Urban Construction Design and Research Institute Co., Ltd., Beijing 100029, China;
3. College of Environmental Science and Engineering, Tongji University 200092, Shanghai

摘要

摘要: 采用厌氧水解技术处理果蔬、园林混合垃圾,探究pH值对产酸效果的影响。在45℃、pH=6的条件下,第11天时反应器内消化液的挥发性脂肪酸(VFA)浓度达到最大值12.94 g/L,是未调控pH条件下VFA浓度的3.37倍,同时使达到最大值的时间减少了20%,大大提高了产酸效率。同时,调控pH可以促进溶解性有机物(SCOD)转化为挥发性脂肪酸,VFA/SCOD在pH=6条件下第11天时达到最大值,为48.73%。进一步对比分析不同条件下的消化液VFA组分和氨氮浓度,调控pH=6可使发酵类型从乙醇型发酵转为丁酸型发酵,也有利于蛋白质的分解。
- 果蔬垃圾 /
- 园林垃圾 /
- 厌氧产酸 /
- pH
Abstract: In this study, fruit and vegetable wastes and garden wastes were treated with anaerobic hydrolysis technology, and the effect of pH on acid production was also discussed. At temperature of 45℃, pH=6, the volatile fatty acid(VFA) concentration of the fermentation liquor in the reactor reached the maximum value of 12.94 g/L on the 11 th day, which was 3.37 times the VFA concentration under the unregulated pH condition, and the time needed to reach the VFA maximum value was reduced by 20%, greatly improving the acid production efficiency. Regulation of pH could also promote the conversion of soluble COD(SCOD) into VFAs. The maximum VFA/SCOD value was achieved on the 11 th day under the condition of pH 6, was 48.73%, which was beneficial to subsequent utilization as a carbon source. By further analyzing the VFA component and ammonia nitrogen concentration in the fermentation liquor with different pH, the condition of pH=6 could change the fermentation type from ethanol type fermentation to butyric acid type fermentation, which was also beneficial to protein decomposition.
- fruit and vegetable waste /
- garden wastes /
- anaerobic hydrolysis acidification stage /
- pH

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参考文献(34)

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