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Facultative-anaerobic microbial digestion of coal preparation waste and use of effluent solids to enhance plant growth in a sandy soil

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International Journal of Coal Science & Technology 2021年第4期8卷 767-779页

作者： Paul HFallgren Liang Chen Min Peng Michael A.Urynowicz Song Jin Advanced Environmental Technologies LLCFort CollinsColorado 80525USA Apaxfon Biosciences Technologies Co. LtdBaotou 014100Inner MongoliaChina School of Civil Engineering Tianjin UniversityTianjin 300072China Department of Civil and Architectural Engineering University of WyomingLaramieWyoming 82071USA

Coal preparation solid waste,which is a major environmental issue for coal-producing areas in China,may be microbiologically digested and transformed into a product suitable as a soil amendment to increase soil organic matter content and prevent and enhance plant/crop *** preparation waste collected from a coal sorting plant in Inner Mongolia,China was digested in bioreactors inoculated with microbial enrichments prepared from activated sludge and cow *** effluent solids from the coal preparation waste bioreactors were analyzed for their suitability as organic soil amendments,which complied with China *** growth tests were conducted in sandy soil from a semi-arid region in Colorado,which was amended with the effluent *** bluegrass(Poa pratensis L.)and chives(Allium schoenoprasum)were used as the representative plants for the growth tests,where results indicated substantially higher yields of Kentucky bluegrass and chives for the sandy soils amended with the effluent solids when compared to a commercial organic *** number and average length of Kentucky bluegrass shoots were 10 and 5.1 times higher,respectively,in soils amended with the effluent ***,the number and average length of chives shoots were 10 and 1.7 times higher,respectively,in soils amended with the effluent ***,the microbial digestion of coal preparation waste for application as an organic soil amendment is a viable alternative and beneficial use of coal preparation solid waste.

关键词： Coal processing waste Coal washing slime Soil amendment Soil restoration waste beneficiation Anaerobic digestion

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