School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China; Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Hefei, Anhui 230601, China.
School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China E-mail:
Water Sci Technol. 2024 Jun;89(12):3163-3177. doi: 10.2166/wst.2024.186. Epub 2024 Jun 7.
Anaerobic co-digestion was conducted on the solid residues after three-phase separation of kitchen waste (KWS) and waste-activated sludge (WAS), the synergistic effects and process performance were studied during co-digestion at different ratios of KWS to WAS. KWS and WAS mix ratios of 0:1, 1:4, 1:3, 1:2, 1:1, 2:1, 3:1, 4:1 and 1:0 (based on TS). The results showed that a ratio of KWS to WAS of 1:1 got a very high methane recovery with a methane yield of 310.45 ± 30.05 mL/g VS. The highest concentration of free ammonia among all reaction systems was only 70.23 ± 5.53 mg/L, which was not enough to produce ammonia inhibition in the anaerobic co-digestion system. However, when the KWS content exceeded 50%, methane inhibition and prolongation of the lag phase were observed due to the accumulation of volatile fatty acids (VFAs), and during the lag phase. Microbial community analysis showed that various bacterial groups involved in acid production and hydrolysis were mainly dominated by phylum , , and . Hydrogenotrophic methanogen was found to dominate all archaeal communities in the digesters. Co-digestion of KWS with WAS significantly increased the relative abundance of compared with anaerobic digestion of WAS alone.
采用三相分离后的厨余垃圾（KWS）固体残渣和剩余污泥（WAS）进行厌氧共消化，研究了不同 KWS 与 WAS 比例下共消化的协同作用和工艺性能。KWS 和 WAS 的混合比例分别为 0:1、1:4、1:3、1:2、1:1、2:1、3:1、4:1 和 1:0（以 TS 计）。结果表明，KWS 与 WAS 的比例为 1:1 时，甲烷回收率非常高，甲烷产率为 310.45 ± 30.05 mL/g VS。所有反应系统中游离氨的最高浓度仅为 70.23 ± 5.53 mg/L，不足以在厌氧共消化系统中产生氨抑制。然而，当 KWS 含量超过 50%时，由于挥发性脂肪酸（VFAs）的积累，会观察到甲烷抑制和迟滞期延长，并且在迟滞期内。微生物群落分析表明，参与产酸和水解的各种细菌群主要以门、、和为主导。在消化器中发现产氢甲烷菌主导所有古菌群落。与单独进行 WAS 的厌氧消化相比，KWS 与 WAS 的共消化显著增加了的相对丰度。
