Life Science College, Liaocheng University, No. 1, Hunan Road, Dongchangfu District, Liaocheng, China.
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.
Microb Biotechnol. 2018 Nov;11(6):1124-1136. doi: 10.1111/1751-7915.13294. Epub 2018 Jul 2.
In order to overcome the excessive acidification problem, a microbial consortium for the degradation of organic acids (MCDOA), which acts synergistically in degrading organic acids, was developed and used as an inoculum to improve the efficiency of food waste composting. MCDOA could eliminate the initial lag phase of the pile temperature rise because of excessive acidification and effectively shorten the composting period. Fluorescence regional integration analysis of the excitation-emission matrix spectra of dissolved organic matter showed that compared with raw material, in compost with MCDOA inoculation, the percent fluorescence response (P ) values of Regions I, II and IV decreased by 95.11%, 94.19% and 87.41%, respectively, and P of Region V increased by 172.57%. The decreased and increased levels were markedly higher than in the two control groups (MgO and K HPO treatment, and uninoculated compost). These findings revealed that MCDOA accelerated the degradation of proteinaceous compounds and the formation of complicated humic-like materials. Bacterial profiles implied that MCDOA could improve the indigenous bacterial community structure and diversities of acetic and propionic acid-degrading and lignin-degrading bacteria, which might account for the high composting efficiency and degree of humification of the inoculated compost.
为了克服过度酸化问题，开发了一种协同作用于降解有机酸的微生物协同体（MCDOA），并将其用作接种物来提高食物垃圾堆肥的效率。MCDOA 可以消除由于过度酸化引起的堆温升高的初始滞后期，并有效缩短堆肥周期。溶解有机物激发-发射矩阵光谱的荧光区域积分分析表明，与原料相比，在接种 MCDOA 的堆肥中，区域 I、II 和 IV 的荧光响应（P）值分别降低了 95.11%、94.19%和 87.41%，而区域 V 的 P 值增加了 172.57%。降低和增加的水平明显高于两个对照组（MgO 和 KHPO 处理以及未接种的堆肥）。这些发现表明，MCDOA 加速了蛋白质化合物的降解和复杂腐殖质样物质的形成。细菌图谱表明，MCDOA 可以改善土著细菌群落结构和降解乙酸和丙酸以及木质素的细菌的多样性，这可能是接种堆肥具有高堆肥效率和腐殖化程度的原因。
