International Journal of Environmental Research and Public Health

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Prof. Dr. Chuncheng Xu

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Guest Editor

College of Engineering, China Agricultural University, Beijing 100083, China
Interests: biomass; fermentation; microbiology; silage; organic waste

Dr. Sasa Zuo

E-Mail Website
Guest Editor

College of Engineering, China Agricultural University, Beijing 100083, China
Interests: silage; lignocellulose degradation; anaerobic digestion; greenhouse gas; applied microbiology; rhizosphere microorganism

Special Issue Information

Dear Colleagues,

Microorganisms play important roles in element transformation and ecological protection, such as ensiling, composting, and biogas production. Reasonable utilization of microorganisms helps to realize low-carbon preservation of high-moisture corps, efficient transformation of by-products, and safe disposal of organic wastes, thus, improving the utilization efficiency of resources and reducing the negative effect of human activities on the environment to achieve sustainable development. Due to the complexes of microorganisms in the environment, their function in biotransformation and ecological protection still lacks systematic understanding. In recent years, with the rapid development of modern biological technology, the diversity and function of microorganisms in a specific environment have become a hot research topic. This Special Issue plans to summarize the research progress of microorganisms in anaerobic and/or aerobic fermentation, uncover their diversity and function in specific environment, and determine some crucial microorganisms for biotransformation and/or ecological protection. Potential topics include, but are not limited to: biotransformation, anaerobic fermentation, aerobic fermentation, microbial diversity, and ecological protection.

Prof. Dr. Chuncheng Xu
Dr. Sasa Zuo
Guest Editors

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Keywords

biotransformation
fermentation
microorganism diversity
ecological protection
organic waste

Published Papers (2 papers)

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Research

16 pages, 3171 KiB

Open AccessArticle

Effect of Anoxic Atmosphere on the Physicochemical and Pelletization Properties of Pinus massoniana Sawdust during Storage

by Hongli Chen, Liqiang Zhang, Zhongliang Huang, Zijian Wu, Mengjiao Tan, Xuan Zhang, Longbo Jiang, Xiaoli Qin, Jing Huang and Hui Li

Int. J. Environ. Res. Public Health 2023, 20(1), 791; https://doi.org/10.3390/ijerph20010791 - 31 Dec 2022

Cited by 8 | Viewed by 1320

Abstract

The 34-day anoxic storage of Pinus massoniana sawdust (PS) in a sealed constant temperature and humidity chambers was carried out to simulate the limited-oxygen storage process inside piles at industrial scale. The effects of anoxic storage on feedstock’s properties and pelletization process were investigated with respect to elemental composition, dry matter loss, thermogravimetric characteristics, energy consumption, pellets’ density, and microbial communities, etc. After anoxic storage, the microbial community of PS samples was altered, such as the fungi content (Clonostachys, Strelitziana, and Orbilia, etc.), resulting the elemental composition of PS was altered. Thus, the cellulose and ash content of the stored PS were increased, while the hemicellulose, volatile, and fixed carbon were decreased. The energy consumption was increased 7.85–21.98% with the increase in anoxic storage temperature and with the additive of fresh soil collected from PS field in storage process. The single pellet density was altered slightly. Meanwhile, the moisture uptake of PS pellets was decreased. After anoxic storage, the combustion behavior of the stored PS became more stable. The results can be applied directly to guide the development of commercial PS storage and pelletization process currently under development in Asia, Europe and North America. Full article

(This article belongs to the Special Issue Microorganisms in Biotransformation and Ecological Protection)

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13 pages, 3973 KiB

Open AccessArticle

Effects of Regular Water Replenishment on Enzyme Activities and Fungal Metabolic Function of Sheep Manure Composting on the Qinghai–Tibet Plateau

by Rui Cai, Xinyu Cui, Shuai Zhang and Chuncheng Xu

Int. J. Environ. Res. Public Health 2022, 19(19), 12143; https://doi.org/10.3390/ijerph191912143 - 25 Sep 2022

Cited by 5 | Viewed by 1473

Abstract

The dry climate characteristics of the Qinghai–Tibet Plateau will seriously affect microbial metabolism during composting. In this study, we aimed to investigate the effects of regular water supplementation on the fungal and enzymatic activities of sheep manure composting in the Qinghai–Tibet Plateau. The experiment set up the treatments of water replenishment once every 7 days(T2) and 3.5 days (T3) days, and no water supplementation was used as the control (T1). The results showed that regular water supplementation increased the activities of various enzymes during composting, and the activities of protease, cellulase, peroxidase and polyphenol oxidase in T3 were higher than those in T2. Regular water supplementation increased the relative abundance of Remersonia and Mycothermus, which were significantly positively correlated with the germination index, and degradation of organic components. Regular water supplementation could enrich fungi carbohydrate, protein, and nucleotide metabolisms, and T3 had a better effect. A redundancy analysis showed that environmental factors could significantly affect the fungal community; among them, moisture content (76.9%, p = 0.002) was the greatest contributor. In conclusion, regular water supplementation can improve the key enzyme activities and fungal metabolic function of sheep manure composting, and water replenishment once every 3.5 days had the best effect. Full article

(This article belongs to the Special Issue Microorganisms in Biotransformation and Ecological Protection)

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