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Jin X, Ai W, Zhang Y, Dong W. Application of functional microbial agent in aerobic composting of wheat straw for waste recycling. LIFE SCIENCES IN SPACE RESEARCH 2022; 33:13-20. [PMID: 35491025 DOI: 10.1016/j.lssr.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/22/2022] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
Controlled Ecological Life Support System (CELSS) is a closed artificial ecosystem which can regenerate oxygen, food, water and other substances for crew survival in long-term space missions. Solid organic waste is a vital resource pool for material reuse and recycling in CELSS. In this study, solid wastes including wheat straw and food waste were disposed via aerobic composting under functional microbial agent inoculation. Compared to tests with a commercial microbial agent addition and without exogenous microorganisms, system performance was promoted by the self-developed microbial agent significantly which exhibited the highest composting temperature (67.4 ± 1.5 °C) and longest thermophilic period (7 days). And treatment with self-developed microbial agent showed the highest values in volatile solid reduction, C/N reduction, germination index (124.83 ± 13.25%) and total available nutrient content (47.45 ± 1.69 g/kg), which suggested the feasibility of compost product to be used for crop cultivation. Moreover, shifts of microbial community in phylum and genus levels were observed. Microbial agent augmentation led to high quality and safe compost product after a short composting period (30 days) without leaching, which suggested an efficient way to promote the recycling and recovery of solid waste in CELSS.
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Affiliation(s)
- Xiangdan Jin
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, China; Space Science and Technology Institute (Shenzhen), Shenzhen, 518117, China.
| | - Weidang Ai
- Space Science and Technology Institute (Shenzhen), Shenzhen, 518117, China; National key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing, 100094, China
| | - Yang Zhang
- Space Science and Technology Institute (Shenzhen), Shenzhen, 518117, China; National key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing, 100094, China
| | - Wenyi Dong
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, China; Public Platform for Technological Service in Urban Waste Reuse and Energy Regeneration, Shenzhen, 518055, China
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Hua D, Fan Q, Zhao Y, Xu H, Chen L, Si H, Li Y. Continuous Anaerobic Digestion of Wood Vinegar Wastewater From Pyrolysis: Microbial Diversity and Functional Genes Prediction. Front Bioeng Biotechnol 2020; 8:923. [PMID: 32850755 PMCID: PMC7422680 DOI: 10.3389/fbioe.2020.00923] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 07/17/2020] [Indexed: 01/21/2023] Open
Abstract
Wood vinegar wastewater (WVWW) is the main by-product of biomass pyrolysis process, which is more suitable to use anaerobic digestion (AD) to achieve energy recovery due to its large amount of organic matter. In this study, the up-flow anaerobic sludge bed (UASB) reactor was used to investigate the continuous anaerobic transformation of WVWW with gradient concentrations (0.3, 0.675, 1, 2, 3, 4, 5, 6, and 7 g COD/L). Then, the changes of microbial community, diversity index and functional gene were analyzed in detail. The results revealed that WVWW showed good AD performance in continuous fermentation. WVWW of organic loading rate (OLR) of >8.58 g COD/L⋅d showed severe inhibition on biodegradability and methane production, which is mainly due to the toxic substances as compared with the control group. The bacterial communities were dominated by phyla of Chloroflexi, Firmicutes, Proteobacteria, Acidobacteria, Synergistetes, and Actinobacteria. The gene abundances related to energy production, carbohydrate transport and metabolism were relatively high, which are mainly responsible for carbon forms conversion and carbohydrate degradation. This study will provide a basis for the screening and enrichment of functional bacteria and genes.
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Affiliation(s)
- Dongliang Hua
- Shandong Provincial Key Laboratory of Biomass Gasification Technology, Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan, China
| | - Qingwen Fan
- Shandong Provincial Key Laboratory of Biomass Gasification Technology, Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan, China
| | - Yuxiao Zhao
- Shandong Provincial Key Laboratory of Biomass Gasification Technology, Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan, China
| | - Haipeng Xu
- Shandong Provincial Key Laboratory of Biomass Gasification Technology, Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan, China
| | - Lei Chen
- Shandong Provincial Key Laboratory of Biomass Gasification Technology, Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan, China
| | - Hongyu Si
- Shandong Provincial Key Laboratory of Biomass Gasification Technology, Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan, China
| | - Yan Li
- Shandong Provincial Key Laboratory of Biomass Gasification Technology, Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan, China.,State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
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Velichko VV, Tikhomirov AA, Ushakova SA, Trifonov SV, Gribovskaya IV. The effect of supplementation of the soil-like substrate with wheat straw mineralized to different degrees on wheat productivity in closed ecosystems. LIFE SCIENCES IN SPACE RESEARCH 2020; 26:132-139. [PMID: 32718679 DOI: 10.1016/j.lssr.2020.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 05/28/2020] [Accepted: 06/03/2020] [Indexed: 06/11/2023]
Abstract
Successful incorporation of soil-like substrate (SLS) into biotechnical life support systems is often complicated by the necessity to maintain the balance between flows of mineral elements taken up from the substrate by growing plants and mineral elements added to the SLS as components of mineralized plant inedible biomass. An imbalance between these two flows can be caused by the addition of recalcitrant plant waste such as wheat straw. The purpose of this study was to determine whether the availability of essential nutrients to be taken up by the roots of the wheat plants grown on the SLS could be enhanced by supplementing the SLS with the products derived from wheat straw subjected to different levels of physicochemical mineralization in the aqueous solution of hydrogen peroxide. Different degrees of straw mineralization were achieved by using different ratios of the aqueous solution of hydrogen peroxide to straw. The study showed that supplementation of the SLS with insufficiently oxidized products of physicochemical mineralization of straw resulted in a decrease in the grain yields. The inhibitory effect of the straw subjected to physicochemical oxidation increased with a decrease in the degree to which the straw had been oxidized. Only supplementation with the straw mineralized to the highest possible degree did not inhibit plant growth and development, and the crop yield in that treatment was higher than in the other treatments.
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Affiliation(s)
- V V Velichko
- Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
| | - A A Tikhomirov
- Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
| | - S A Ushakova
- Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
| | - S V Trifonov
- Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
| | - I V Gribovskaya
- Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
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