堆肥
厚壁菌
沼渣
化学
食品科学
蛋白质细菌
食物垃圾
绿色废弃物
聚丙烯酸钠
氮气
稻草
营养物
环境化学
农学
生物
生物化学
有机化学
生态学
厌氧消化
无机化学
甲烷
原材料
基因
16S核糖体RNA
作者
Tigao Fang,Tao Wang,Mingxing Zhao,Linquan Bai,Yun Deng,Wenquan Ruan
标识
DOI:10.1016/j.jenvman.2022.116531
摘要
The influences of sodium polyacrylate (PAAS) at the ratios of 0% (CK), 0.5% (F1), 1.0% (F2), 1.5% (F3), 2.0% (F4) and 2.5% (F5) on nitrogen transformation and bacterial community composition were investigated in the composting of food waste digestate (FWD) and corn straw (CS). PAAS addition increased the thermophilic temperature but had no significant effect on pH values. PAAS exerted significantly effects on the concentration of total nitrogen (TN), ammonia nitrogen (NH4+-N), nitrite-nitrogen (NO2−-N) and nitrate-nitrogen (NO3−-N). The compost product in 1.0% PAAS treatment was more active in absorbing nutrients. Firmicutes (9.40–83.54%), Actinobacteriota (9.98–51.50%), Proteobacteria (0.20–27.87%) and Bacteroidota (0.11–34.69%) were the dominant phyla in FWD composting. Moreover, relative to CK, PAAS promoted the propagation of dominant bacterial phyla Firmicutes with increment of 30.05–102.06% in the thermophilic phase. Kroppenstedtia, Thermobifida and Saccharomonospora were observed to be dominant at the maturing phase and correlated with NH4+-N, NO2−-N, TN and NO3−-N. Therefore, they might be regarded as probable biomarkers symbolic for the maturing phase during FWD composting. The compost product had the highest maturity degree in 1.0% PAAS treatment. These results indicated that PAAS addition improved the maturity and nutrient contents of the compost product as well as altered compost bacterial community dynamics.
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