Environmental Sanitation Engineering ›› 2025, Vol. 33 ›› Issue (5): 27-34.doi: 10.19841/j.cnki.hjwsgc.2025.05.004

Previous Articles     Next Articles

Study on the Effect of Feed Loading Adjustment on Anaerobic Fermentation Acidification and Recovery of Kitchen Waste

CHEN Ximei   

  1. Fuzhou ZCK Utilization of Renewable Co. Ltd.
  • Online:2025-10-27 Published:2025-10-27

PDF (PC)

57

PDF (Mobile)

0

Abstract: Currently, anaerobic digestion for biogas production is the most prevalent treatment technology for food waste, but improper operation can easily lead to acidification.The characteristics of acidification in food waste anaerobic digestion systems caused by increased feeding load, as well as early warning indicators and recovery strategies were studied. The results showed that a 31.3% increase in feeding load within 15 days induced system acidification. Changes in biogas production per unit, total alkalinity (ALK), volatile fatty acids (VFA), and the VFA/ALK ratio were 42, 40, 28, and 28 days earlier than acidification of the system, respectively, and could be used as early warning indicators for acidification, among which biogas production per unit was the most sensitive. During the acidification period, the minimum biogas production per unit, ALK, methane content, and pH decreased by up to 65%, 27%, 19%, and 10.5%, respectively, compared to initial values, while the maximum VFA and VFA/ALK ratio increased by 674% and 953%, respectively. Acidification could be effectively mitigated by reducing the feeding load and adding Na2CO3. The entire process from acidification triggered by increased load to complete recovery took 86 days, with only 4 320 kg of Na2CO3 consumed, demonstrating feasibility and cost-effectiveness. During recovery, indicators normalized in the following sequence, namely methane content, biogas production per unit, pH, VFA, VFA/ALK ratio, and ALK. A decrease in VFA below 2 000 mg/L and VFA/ALK below 0.25 can serve as criteria for determining the resolution of acidification warnings. All indicators showed significant correlations (p<0.01) across stable, acidified, and recovery phases.

Key words: food waste, anaerobic fermentation, acidification, recovery, warning parameters

[1] LIU Rongjie, JIN Hong, XIAO Liqi, YIN Hanbing, ZHANG Lei. Carbon Emission Analysis of Typical Food Waste Resource Recovery Projects [J]. Environmental Sanitation Engineering, 2025, 33(4): 28-37.
[2] WU Jian, CHUI Chunmeng, WANG Zhiyu, LE Liangliang, CHEN Weihua, HUA Yinfeng, XU Along. Application of Landfill Algae-photovoltaic Complementarity System in the Resource Recovery of Kitchen Waste AnMBR Effluent [J]. Environmental Sanitation Engineering, 2025, 33(4): 78-85.
[3] WANG Huihui, WANG Ling, ZHU Minhang, LIAN Songjian. Analysis on Current Situation and Processing Costs of Food Waste Treatment Facilities in China [J]. Environmental Sanitation Engineering, 2025, 33(3): 12-18.
[4] WANG Yujie, QIU Junjie, LYU Fan, ZHANG Hua, HE Pinjing. Bottlenecks in Scaling up Lactate-mediated Carbon Chain Elongation for Caproate Production [J]. Environmental Sanitation Engineering, 2025, 33(3): 27-36,48.
[5] XIA Qing, XU Xiaojian, ZHANG Yuting, ZHOU Chengya, LIU Haichun. Occurrence Characteristic and Risk Assessment of Heavy Metals in Yangzhou Household Food Waste [J]. Environmental Sanitation Engineering, 2025, 33(2): 50-54.
[6] WANG Yiran, MENG Xingyao, LI Jinglin, WANG Pan, REN Lianhai. Research Status of Malodorous Gas Emissions During the Aerobic Composting Process of Food Waste [J]. Environmental Sanitation Engineering, 2025, 33(1): 40-49,56.
[7] LI Guoqing. Optimization of Breeding and Economic Benefit Analysis Based on Self-supply of Black Soldier Fly Eggs [J]. Environmental Sanitation Engineering, 2024, 32(6): 50-56.
[8] QIN Shengnan. Research on Combined Pretreatment Technology of Preparing Carbon Source from Wet Waste Slurry [J]. Environmental Sanitation Engineering, 2024, 32(6): 57-63.
[9] SHANG Yijun, LI Xunan, LIU Yan, CHEN Yongjie, YUAN Wei, LU Jianhong. Research Progress on the Growth and Reduction of Antibiotic Resistance Genes in Aerobic Compost of Food Waste [J]. Environmental Sanitation Engineering, 2024, 32(6): 80-89.
[10] ZHANG Li, LI Ke, ZHU Yaping, WU Yuan, YANG Hujun. Preparation of Carbon Source by Food Waste Dish Separation and Its Application [J]. Environmental Sanitation Engineering, 2024, 32(5): 62-66.
[11] YU Yaping. Technical and Economic Analysis of Sludge Incineration Flue Gas Deacidification Process [J]. Environmental Sanitation Engineering, 2024, 32(5): 87-92.
[12] ZHOU Yongquan, LI Xiaowei, TAI Jun. The Effects of Low-dosage Paper Addition on Co-Digestion of Food Waste and Kitchen Waste [J]. Environmental Sanitation Engineering, 2024, 32(4): 36-43.
[13] OUYANG Chuang, ZHANG Yurong, TAI Jun, XU Xianbao, XUE Gang, LI Xiang. Comparative Study on Anaerobic Digestion of Food Waste Enhanced by Biogas Residue Hydrochar and Biogas Residue Pyrochar [J]. Environmental Sanitation Engineering, 2024, 32(3): 47-53.
[14] TIAN Qihuan, GAO Yanda, GONG Yabin, DU Rui, WANG Lilun, YAO Jiangang. A Pilot Study on Efficient Anaerobic Biogas Production of Kitchen Waste Under Intermediate Temperature [J]. Environmental Sanitation Engineering, 2024, 32(2): 39-45.
[15] SUN Caiping, CHEN Ziqi, ZENG Qin, HUANG Jiankang, HE Jianhe, XU Siyuan, ZHANG Lei, YANG Luxin, LI Huan. Ethanol Production from Anaerobic Fermentation of Fruit and Vegetable Wastes Under Different Operating Conditions [J]. Environmental Sanitation Engineering, 2024, 32(2): 46-52.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] . Exploration and Research on Improving the Classification Effect of Domestic Garbage in Guangzhou   [J]. Environmental Sanitation Engineering, 2018, 26(3): 4 -7 .
[2] . Inhibition Concentration and Elimination Method of Ammonia Nitrogen in Anaerobic Digestion Process   [J]. Environmental Sanitation Engineering, 2018, 26(3): 33 -35 .
[3] . [J]. Environmental Sanitation Engineering, 2018, 26(1): 26 -30 .
[4] . Comparison and Stability Study of Capacity-increasing Scheme for Sludge Landfill Reservoir in Laogang Comprehensive Landfill[J]. Environmental Sanitation Engineering, 2018, 26(4): 51 -55 .
[5] . Research and Development on Automatic Combustion Control of Waste Incineration Power Plant[J]. Environmental Sanitation Engineering, 2018, 26(4): 64 -66 .
[6] . [J]. Environmental Sanitation Engineering, 2018, 26(5): 76 -79 .
[7] . [J]. Environmental Sanitation Engineering, 2018, 26(6): 9 -11 .
[8] . [J]. Environmental Sanitation Engineering, 2019, 27(1): 1 -8 .
[9] . [J]. Environmental Sanitation Engineering, 2019, 27(1): 93 -96 .
[10] . [J]. Environmental Sanitation Engineering, 2019, 27(4): 41 -43 .
Copyright © Environmental Sanitation Engineering
Address: 107#, Weidi Road, Tianjin, P.R.C.　 　 Postcode: 300201
Telephone: 022-28365069 　 Fax: 022-28365080 E-mail: csglwyjs10@tj.gov.cn
Supported by:Beijing Magtech