CHENGXiao-ge,WANGWan,DENGGuan-yong,et al.Enhanced Anaerobic Digestion of Greasy Food Waste with Calcium Peroxide Pretreatment Coupled with Zero-valent Iron[J].China Water & Wastewater,2024,40(1):90-96.
Enhanced Anaerobic Digestion of Greasy Food Waste with Calcium Peroxide Pretreatment Coupled with Zero-valent Iron
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第1期
Page:
90-96
Column:
Date of publication:
2024-01-01
- Abstract:
- It is difficult to degrade grease in food waste, which easily leads to the failure of anaerobic digestion. This paper adopted calcium peroxide (CaO2) pretreatment coupled with zero?valent iron (ZVI) to promote the anaerobic digestion process of greasy food waste, and the chemical consumption was optimized to achieve a better digestion performance. The optimal dosage of CaO2 pretreatment was 0.05 g/gVS, and the optimal pretreatment time was 24 hours. After pretreatment, the degradation rate of grease was increased by 300.06%, and the concentrations of soluble protein and soluble polysaccharide were increased by 2.87 times and 1.95 times, respectively. The addition of ZVI with concentration of 3 g/L increased the cumulative gas production to 368.92 mL/gVS, which increased by 95.92% compared with that of the blank group, and the activities of coenzyme F420 and electron transport system (ETS) increased by 46.93% and 105.13%, respectively. CaO2 pretreatment promoted the degradation of organic matter, and ZVI improved the system stability and related enzyme activities, indicating that the CaO2 pretreatment coupled with ZVI effectively improved the gas production performance of greasy food waste in anaerobic digestion.
Last Update:
2024-01-01