Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China.
Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China; Organic Recycling Institute (Suzhou) of China Agricultural University, Wuzhong District, Suzhou, 215128, China.
J Environ Manage. 2023 Jan 15;326(Pt A):116662. doi: 10.1016/j.jenvman.2022.116662. Epub 2022 Nov 5.
To determine factors affecting compost maturity and gaseous emissions during the rapid composting of kitchen waste, an orthogonal test was conducted with three factors: moisture content (MC) (55%, 60%, 65%), aeration rate (AR) (0.3,0.6 and 0.9 L·kgDM·min) and C/N ratio (21, 24, 27). The results showed that the importance of factors affecting compost maturity was: C/N > AR > MC, optimal conditions were: C/N of 24, AR of 0.3 L·kgDM·minand MC of 65%. For gaseous emissions, the sequence of essential factors affecting NH emissions was: C/N > MC > AR, and the optimal parameters for NH reduction were: C/N of 27, MC of 65%, and AR of L·kgDM·min. The important factors affecting NO and HS emissions are both: MC > C/N > AR, while their best parameters were different. The optimal parameters for NO emission reduction were MC of 60%, AR of 0.3 L·kgDM·min and C/N of 24, while these for HS were MC of 55%, AR of 0.3 L·kgDM·min and C/N of 21. The C/N mainly affected the compost maturity and AR further affected the maturity and pollutant gas emissions by influencing the temperature and O content. Considering comprehensively the maturity and gaseous reduction, the optimal control parameters were: MC of 60%-65%, AR of L·kgDM·min, and C/N of 24-27.
为了确定影响厨余垃圾快速堆肥成熟度和气体排放的因素，采用三因素正交试验，分别为水分含量（MC）（55%、60%、65%）、通气速率（AR）（0.3、0.6 和 0.9 L·kgDM·min）和 C/N 比（21、24、27）。结果表明，影响堆肥成熟度的因素重要性顺序为：C/N＞AR＞MC，最佳条件为：C/N 比 24、AR 为 0.3 L·kgDM·min、MC 为 65%。对于气体排放，影响 NH 排放的重要因素顺序为：C/N＞MC＞AR，NH 减排的最佳参数为：C/N 比 27、MC 为 65%、AR 为 L·kgDM·min。影响 NO 和 HS 排放的重要因素均为：MC＞C/N＞AR，但其最佳参数不同。NO 减排的最佳参数为 MC 为 60%、AR 为 0.3 L·kgDM·min、C/N 比 24，HS 减排的最佳参数为 MC 为 55%、AR 为 0.3 L·kgDM·min、C/N 比 21。C/N 主要影响堆肥成熟度，AR 通过影响温度和 O 含量进一步影响成熟度和污染物气体排放。综合考虑成熟度和气体减排，最佳控制参数为：MC 为 60%-65%、AR 为 L·kgDM·min、C/N 比为 24-27。
