Abstract：
Although aerobic composting is usually utilized in livestock manure disposal, the emission of odorous gases from compost not only induces harm to the human body and the environment, but also causes loss of nitrogen, sulfur, and other essential elements, resulting in a decline in product quality. The impact of biotrickling filter (BTF) and insertion of carbon-based microbial agent (CBMA) on compost maturation, odor emissions, and microbial population during the chicken manure composting were assessed in the current experiment. Compared with the CK group, CBMA addition accelerated the increase in pile temperature (EG group reached maximum temperature 10 days earlier than CK group), increased compost maturation (GI showed the highest increase of 41.3% on day 14 in EG group), resulted in 36.59% and 14.60% increase in NO3--N content and the total nitrogen retention preservation rate after composting. The deodorization effect of biotrickling filter was stable, and the removal rates of NH3, H2S, and TVOCs reached more than 90%, 96%, and 56%, respectively. Furthermore, microbial sequencing showed that CBMA effectively changed the microbial community in compost, protected the ammonia-oxidizing microorganisms, and strengthened the nitrification of the compost. In addition, the nitrifying and denitrifying bacteria were more active in the cooling period than they were in the thermophilic period. Moreover, the abundance of denitrification genes containing nirS, nirK, and nosZ in EG group was lower than that in CK group. Thus, a large amount of nitrogen was retained under the combined drive of BTF and CBMA during composting. This study made significant contributions to our understanding of how to compost livestock manure while reducing releases of odors and raising compost quality.
摘要：
尽管好氧堆肥通常用于处理牲畜粪便，堆肥排放恶臭气体不仅对人体和环境造成危害，但也会导致氮的损失，硫磺,和其他基本要素，导致产品质量下降。生物滴滤（BTF）和插入碳基微生物剂（CBMA）对堆肥成熟的影响，气味排放,在本实验中评估了鸡粪堆肥过程中的微生物种群。与CK组相比,添加CBMA加速了桩温的升高（EG组比CK组早10天达到最高温度），堆肥成熟度增加（GI在EG组的第14天显示出41.3％的最高增长），堆肥后NO3--N含量和总氮保留率分别增加36.59％和14.60％。生物滴滤池除臭效果稳定,和NH3，H2S的去除率，TVOCs达到90%以上，96%,56%,分别。此外，微生物测序表明，CBMA有效地改变了堆肥中的微生物群落，保护氨氧化微生物，并加强了堆肥的硝化作用。此外,硝化和反硝化细菌在冷却期比在嗜热期更活跃。此外，含有nirS的反硝化基因的丰度，nirk,EG组nosZ低于CK组。因此，在BTF和CBMA的共同驱动下，堆肥过程中保留了大量的氮。这项研究为我们对如何堆肥牲畜粪便的理解做出了重大贡献，同时减少了气味的释放并提高了堆肥质量。
