College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Department of Biotechnology, Amicable Knowledge Solution University, Satna, India.
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
Bioresour Technol. 2018 Jan;247:970-979. doi: 10.1016/j.biortech.2017.09.201. Epub 2017 Oct 4.
This study aimed to evaluate the feasibility of medical stone (MS) on microbial biomass, bacteria genes copy numbers, mitigation of gaseous emissions and its correlation with analyzed parameters during the biosolids composting. Composting of the biosolids by amendment of MS 0%, 2%, 4%, 6% and 10% (on dry weight basis) was performed using a 130-L composting reactor. The results showed that with increasing the dosage of MS, the CH, NO and NH emission were reduced by 60.5-88.3%, 46.6-82.4% and 38.2-78.5%, respectively. In addition, the 6-10% MS amendment enhanced the organic waste mineralization and prolonged the thermophilic phase. The abundance of ammonia oxidizing bacteria (AOB) and archaea (AOAB) were decreased during the first 28 days, but considerable increment was observed during the maturation phase which indicated that AOB and AOAB were liable for nitrification during the curing phase of composting. A significant correlation was observed among the all analyzed parameters in 6-10% MS blended treatments.
本研究旨在评估麦饭石（MS）在微生物生物量、细菌基因拷贝数、气态排放缓解及其与生物固体堆肥过程中分析参数之间的相关性方面的可行性。采用 130-L 堆肥反应器，通过添加 0%、2%、4%、6%和 10%（干重基础）的 MS 对生物固体进行堆肥。结果表明，随着 MS 用量的增加，CH、NO 和 NH 的排放量分别减少了 60.5-88.3%、46.6-82.4%和 38.2-78.5%。此外，6-10%MS 的添加促进了有机废物的矿化并延长了高温期。在最初的 28 天内，氨氧化细菌（AOB）和古菌（AOAB）的丰度降低，但在成熟阶段观察到相当大的增加，这表明 AOB 和 AOAB 在堆肥的固化阶段易于硝化。在 6-10%MS 混合处理中，所有分析参数之间存在显著相关性。
