In order to boost the economics of biogas utilization in those small facilities for food waste (FW) digestion, proximate grease trap waste (GTW) was employed to co-digest with FW. A bench-scale continuous stirred tank reactor was set up and operated at mesophilic temperature to investigate the co-digestion limit and lipid/long chain fatty acid (LCFA) conversion by increasing lipid loading stepwise. Mixing FW and GTW at lipid/total solids (TS) 55%, where the lipid loading was 1.61 g/(L·d), was proved to be appropriate, and the maximum methane yield reached 68% higher than the mono-digestion of FW, with a similar lipid reduction at approximately 90%. In addition, since acetic acid accumulation above 100 mg HAc/L had been observed under the optimal loading, the threshold value for anaerobic co-digestion of FW and GTW was confined to the lipid loading around 1.61 g/(L·d). The rapid recovery strategy of mixing the inhibited sludge with fresh inoculum at 1:4 (V/V) took effect after process failure resulted from further increasing lipid/TS to 70%. Lipid/LCFA concentrations in the effluent rose with the increased lipid loading, while palmitic acid accounted for the most percentage among the residual LCFAs, as high as 73.7% at lipid/TS 55%. Acetoclastic methanogens played an important role in accelerating process conversion, due to the fact that raising GTW addition led to the increased methanogenic activity, with a value of 26.9 mL-CH₄/(g-VS·d) at the optimal loading.

为了提高那些用于食物残渣（FW）消化的小型设施中沼气利用的经济性，采用了邻近的隔油池废物（GTW）与FW共同消化。建立一个台式规模的连续搅拌釜反应器，并在中温温度下操作，以逐步增加脂质的负载量来研究共消化极限和脂质/长链脂肪酸（LCFA）的转化率。FW和GTW在脂质/总固体含量（TS）为55％（脂质负载为1.61 g /（L·d））混合时被证明是合适的，并且最大甲烷产量比单消化的甲烷高68％。 FW，类似的脂质减少约90％。此外，由于在最佳负载下已观察到乙酸积累超过100 mg HAc / L，FW和GTW厌氧消化的阈值限制在脂质负载量约1.61 g /（L·d）。将抑制的污泥与新鲜接种物以1：4（V / V）混合的快速恢复策略在脂质/ TS进一步提高至70％导致工艺失败后生效。废水中的脂质/ LCFA浓度随脂质负荷的增加而增加，而棕榈酸占残留LCFA的最大百分比，在脂质/ TS 55％时高达73.7％。破骨细胞产甲烷菌在加速过程转化中起着重要作用，原因是增加GTW添加量导致产甲烷活性增加，其价值为26.9 mL-CH 4（V / V）在脂质/ TS进一步增加至70％导致工艺失败后生效。废水中的脂质/ LCFA浓度随脂质负荷的增加而增加，而棕榈酸占残留LCFA的最大百分比，在脂质/ TS 55％时高达73.7％。破骨细胞产甲烷菌在加速过程转化中起着重要作用，原因是增加GTW添加量导致产甲烷活性增加，其价值为26.9 mL-CH 4（V / V）在脂质/ TS进一步增加至70％导致工艺失败后生效。废水中的脂质/ LCFA浓度随脂质负荷的增加而增加，而棕榈酸占残留LCFA的最大百分比，在脂质/ TS 55％时高达73.7％。破骨细胞产甲烷菌在加速过程转化中起着重要作用，原因是增加GTW添加量导致产甲烷活性增加，其价值为26.9 mL-CH在最佳负载下为₄ /（g-VS·d）。