Shanghai Academy of Landscape Architecture Science and Planning, Shanghai Engineering Research Center of Landscaping On Challenging Urban Sites, 899 Longwu Road, Shanghai, 200232, People's Republic of China.
Environ Sci Pollut Res Int. 2022 Oct;29(47):71785-71795. doi: 10.1007/s11356-022-20616-0. Epub 2022 May 23.
This study used biogas residue produced by anaerobic fermentation of food waste as the raw material in large-scale windrow composting. The effects of the addition of a microbial consortium on the physical and chemical properties and stability of composting of biogas residue were studied. The maturity of food waste biogas residue during composting was investigated by multivariate interaction of environmental, maturity, and nutrient parameters, using structural equation modeling (SEM). Results showed that the temperature of T2 compost with the microbial consortium increased more rapidly. The pH ranges of T1 (without the microbial consortium) and T2 were 8.75-9.15 and 8.42-9.27, respectively; the electrical conductivity (EC) ranges of T1 and T2 were 2.74-3.95 mS/cm and 2.81-3.85 mS/cm, respectively; the degradation rates of organic matter (OM) in T1 and T2 were 21.74% and 33.62%, respectively; and the total nitrogen (TN) ranges of T1 and T2 were 1.93-3.10% and 1.80-3.21%, respectively. By the end of composting, the germination indices (GI) of T1 and T2 were 20.57% and 64.24%, respectively. The total oxygen consumption after 4 days (AT) was 1.88 mg-O/g and 1.2 mg-O/g in T1 and T2, respectively. SEM of T1 showed that compost temperature and EC were important factors affecting compost maturity. These factors highly significantly affected OM, which in turn affected AT of the biogas residue composting. SEM of T2 showed that compost temperature, pH, and EC affected OM, which in turn affected compost maturity. Temperature affected compost maturity by affecting AT and GI. Principal component analysis (PCA) showed that the overall score of T2 was higher than that of T1, indicating that the addition of the microbial consortium was beneficial for industrial-scale composting of biogas residue produced by anaerobic digestion of food waste.
本研究以餐厨垃圾厌氧发酵产生的沼渣为原料，采用大规模条垛堆肥进行堆肥。研究了添加微生物菌剂对沼渣堆肥理化性质和稳定性的影响。采用结构方程模型（SEM），通过环境、成熟度和养分参数的多元相互作用，研究了堆肥过程中餐厨垃圾沼气残渣的成熟度。结果表明，添加微生物菌剂的 T2 堆肥温度上升更快。T1（未添加微生物菌剂）和 T2 的 pH 值范围分别为 8.75-9.15 和 8.42-9.27；T1 和 T2 的电导率（EC）范围分别为 2.74-3.95 mS/cm 和 2.81-3.85 mS/cm；T1 和 T2 的有机物（OM）降解率分别为 21.74%和 33.62%；T1 和 T2 的总氮（TN）范围分别为 1.93-3.10%和 1.80-3.21%。堆肥结束时，T1 和 T2 的发芽指数（GI）分别为 20.57%和 64.24%。T1 和 T2 的第 4 天总需氧量（AT）分别为 1.88 mg-O/g 和 1.2 mg-O/g。T1 的 SEM 表明，堆肥温度和 EC 是影响堆肥成熟度的重要因素。这些因素对 OM 有显著影响，而 OM 又反过来影响沼气残渣堆肥的 AT。T2 的 SEM 表明，堆肥温度、pH 值和 EC 影响 OM，进而影响堆肥成熟度。温度通过影响 AT 和 GI 来影响堆肥成熟度。主成分分析（PCA）表明，T2 的综合得分高于 T1，表明添加微生物菌剂有利于食品垃圾厌氧消化产生的沼气残渣的工业化堆肥。
