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.
CaO2预处理耦合ZVI强化含油餐厨垃圾厌氧消化
- Title:
- Enhanced Anaerobic Digestion of Greasy Food Waste with Calcium Peroxide Pretreatment Coupled with Zero-valent Iron
- 关键词:
- 餐厨垃圾; 油脂; 过氧化钙(CaO2); 零价铁(ZVI); 厌氧消化
- 摘要:
- 餐厨垃圾中油脂降解困难，易导致厌氧消化失败。为促进含油餐厨垃圾的厌氧消化过程，采用过氧化钙（CaO2）预处理和添加零价铁（ZVI）耦合策略，并优化投加量。结果表明，CaO2预处理最优投加量为0.05 g/gVS，最佳预处理时间为24 h。预处理后油脂降解率提高了300.06%，溶解性蛋白质和多糖的浓度分别提高了2.87和1.95倍。添加3 g/L的ZVI使累积产气量达368.92 mL/gVS，较空白组提高了95.92%，辅酶F420和电子传递体系（ETS）活性分别提高了46.93%和105.13%。CaO2预处理促进了有机质的降解，ZVI提高了系统稳定性和相关酶活性。CaO2预处理和添加ZVI耦合策略可有效提高含油餐厨垃圾的厌氧消化产气性能。
- 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.
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