以餐厨垃圾为原料,研究不同湿热预处理除油条件（温度和处理时间）,并将其作为厌氧消化底物进行产沼气潜力测试。研究表明,餐厨垃圾的最佳预处理条件为95 ℃,处理时间90 min,可浮油含量可提升至4.22 %;随着温度的升高,浮油去除率逐步提升至2.21%。餐厨垃圾经95 ℃湿热预处理后,厌氧消化沼气产率达413 mL/g VS。厌氧消化系统中pH值的稳定性较好,保持在6.5~7.5之间,挥发性脂肪酸转化率可达74.31%,处理效果优于其他两个预处理组;挥发性固体（VS）去除率与出料总固体（TS）受温度影响较大,95 ℃时VS去除率可达56.2%,与未处理组相比提高8.1%。
Abstract
In this work, the conditions （temperature and treatment time） of different wet heat pretreatment for oil removal are investigated using food waste as raw material and tested for biogas production potential as anaerobic digestion substrate. The results show that the optimal wet-based thermal oil removal pretreatment condition is 95 ℃, the treatment time is 90 min, the floating oil content of food waste is 4.22%, and the oil removal rate is 2.21%. The biogas yield of food waste anaerobic digestion after 95 ℃ wet-based thermal pretreatment is the largest, reaching 413 mL/g VS. The pH of the biogas slurry is kept at 6.5-7.5, and the conversion rate of volatile fatty acids reaches 74.31%, which is better than the other two pretreatment groups. The VS and TS removal rate of the effluent increased with the increase of treatment temperature. Under the condition of 95 ℃ pretreatment, the VS removal rate reaches 56.2%, which is 8.1% higher than that of the non-pretreatment.
关键词
沼气 /
餐厨垃圾 /
湿热除油 /
厌氧消化
Key words
biogas /
food waste /
wet-based thermal treatment /
anaerobic digestion
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基金
国家重点研发计划（2021YFC2101605）; 广东省重点领域研发计划（2019B110209003）
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