DOI: 10.1016/j.watres.2018.03.049
Scopus记录号: 2-s2.0-85044675970
论文题名: Spent coffee ground as a new bulking agent for accelerated biodrying of dewatered sludge
作者: Hao Z. ; Yang B. ; Jahng D.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 138 起始页码: 250
结束页码: 263
语种: 英语
英文关键词: Bacterial community
; Biodrying
; Dewatered sludge (DS)
; Dissolved organic matter (DOM)
; Spent coffee ground (SCG)
Scopus关键词: Bacteria
; Bacteriology
; Biodegradation
; Biogeochemistry
; Biological materials
; Calorific value
; Chemicals removal (water treatment)
; Enzymes
; Fuels
; Organic compounds
; Waste management
; Bacterial community
; Bio-drying
; Dewatered sludge
; Dissolved organic matters
; Spent coffee grounds
; Dewatering
; bulking agent
; carbon dioxide
; dissolved organic matter
; polysaccharide
; water
; bacterium
; bioactivity
; biodegradation
; comparative study
; dewatering
; dissolved organic matter
; microbial community
; moisture content
; pollutant removal
; sludge
; Actinobacteria
; Article
; Bacillus
; Bacteroidetes
; biodegradability
; biodegradation
; biomass
; carbon dioxide evolution
; coffee
; combustion
; environmental temperature
; enzyme activity
; evaporation
; Firmicutes
; Geobacillus
; heating
; high temperature
; microbial activity
; microbial community
; microbial degradation
; moisture
; nonhuman
; priority journal
; protein content
; Proteobacteria
; pyrosequencing
; sawdust
; sludge dewatering
; sludge drying
; temperature sensitivity
; thermophilic bacterium
; water vapor
; bacterium
; bioremediation
; chemistry
; desiccation
; metabolism
; procedures
; sewage
; temperature
; waste
; Bacillus (bacterium)
; Bacteria (microorganisms)
; Firmicutes
; Geobacillus
; Thermobifida
; Ureibacillus
; Bacteria
; Biodegradation, Environmental
; Coffee
; Desiccation
; Sewage
; Temperature
; Waste Products
; Water
英文摘要: The feasibility of using spent coffee ground (SCG) as a new bulking agent for biodrying of dewatered sludge (DS) was investigated in comparison with two other frequently-used bulking agents, air-dried sludge (AS) and sawdust (SD). Results showed that the moisture contents (MC) of 16-day DS biodrying with AS (Trial A), SCG (Trial B) and SD (Trial C) decreased from 70.14 wt%, 68.25 wt% and 71.63 wt% to 59.12 wt%, 41.35 wt% and 57.69 wt%, respectively. In case of Trial B, the MC rapidly decreased to 46.16 wt% with the highest water removal (70.87%) within 8 days because of the longest high-temperature period (5.8 days). Further studies indicated that the abundant biodegradable volatile solids (BVS) and high dissolved organic matter (DOM) contents in SCG were the main driving forces for water removal. According to pyrosequencing data, Firmicutes, most of which were recognized as thermophiles, was rapidly enriched on Day 8 and became the dominant phylum in Trial B. Four thermophilic genera, Bacillus, Ureibacillus, Geobacillus and Thermobifida, which can produce thermostable hydrolytic extracellular enzymes, were the most abundant in Trial B, indicating that these thermophilic bacteria evolved during the long high-temperature period enhanced the biodegradation of BVS in SCG. The 8-day biodried product of Trial B was demonstrated to be an excellent solid fuel with low heating value (LHV) of 9284 kJ kg−1, which was 2.1 and 1.8 times those of biodried products with AS and SD, respectively. Thus SCG was found to be an excellent bulking agent accelerating DS biodrying and producing a solid fuel with a high calorific value. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112790
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Engineering & Energy, Myongji University, 116 Myongjiro, Cheoingu, Yonginshi, Gyeonggido 17058, South Korea; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Recommended Citation:
Hao Z.,Yang B.,Jahng D.. Spent coffee ground as a new bulking agent for accelerated biodrying of dewatered sludge[J]. Water Research,2018-01-01,138