引用本文:王紫琪,周海东,张喆,等.活性污泥及其与秸秆共基质的厌氧消化特性[J].环境科学研究,2017,30(2):315-321.
WANG Ziqi,ZHOU Haidong,ZHANG Zhe,et al.Characteristics of Anaerobic Digestion of Activated Sludge and Co-Substrates with Waste Straw[J].Reserrch of Environmental Science,2017,30(2):315-321.]
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活性污泥及其与秸秆共基质的厌氧消化特性
王紫琪, 周海东, 张 喆, 王莹莹
上海理工大学环境与建筑学院, 上海 200093
摘要:
为分析秸秆对污泥厌氧消化特性的影响,在中温〔(35±1)℃〕条件下,研究了活性污泥单基质及其与秸秆共基质在SRT(固体停留时间)分别为10和15 d,以及C/N(质量比)分别为5.5∶1、10.0∶1的情况下,厌氧消化产沼气量及其组分、ρ(NH4+-N)、ρ(TP)、ρ(CODCr)及ρ(VFA)〔以ρ(乙酸)计,其中VFA为挥发性短链脂肪酸〕的变化特性.结果表明:活性污泥-秸秆共基质厌氧消化在SRT为10、15 d时,累积沼气产量为5 818.0、9 026.0 mL,比活性污泥单基质的沼气产量(4 930.0、7 760.0 mL)分别提高了15.3%、14.0%;共基质所产沼气中φ(CH4)最高为69.3%,比活性污泥单基质高出15.4%.此外,在SRT为10和15 d时,活性污泥-秸秆共基质厌氧消化CODCr去除率分别为25.0%和28.0%,优于单基质的10.2%和13.1%;共基质平均ρ(NH4+-N)分别为278.5和254.9 mg/L,单基质平均ρ(NH4+-N)分别为215.6和213.5 mg/L;活性污泥-秸秆共基质平均ρ(TP)分别为168.6和175.9 mg/L,高于活性污泥单基质的129.2和152.2 mg/L.共基质有利于厌氧消化液中有机物的提高,从而增加ρ(VFA)、提高甲烷产量.研究显示,共基质可优化厌氧消化底物的C/N,促进厌氧消化反应,提高产气量.
关键词:  污泥  秸秆  共消化  固体停留时间  甲烷
DOI:
分类号:
基金项目:上海市科委基础研究重大项目(13DJ1400105);国家自然科学基金项目(51279108)
Characteristics of Anaerobic Digestion of Activated Sludge and Co-Substrates with Waste Straw
WANG Ziqi, ZHOU Haidong, ZHANG Zhe, WANG Yingying
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
Abstract:
Abstract: In order to investigate the characteristics of anaerobic digestion of activated sludge and co-substrates with waste straw, anaerobic digestion with activated sludge and co-substrates with waste straw was conducted under mesophilic condition(35±1) ℃ with solid retention time(SRT) of 10 and 15 d. The variation characteristics of biogas production and composition, ρ(NH4+-N), ρ(TP), ρ(CODCr) and ρ(VFA) were investigated with the C/N(mass ratio) of mono-substrate of sewage sludge and co-substrates set at 5.5∶1 and 10∶1, respectively. When SRT were 10 and 15 d, the cumulative biogas productions from co-substrates were 5818.0 and 9026.0 mL, respectively, 15.3% and 14.0% higher than those of the mono-substrate(i.e. 4930.0 and 7760.0 mL), respectively. The maximal φ(CH4) from co-substrates was 69.3%, 15.4% higher than that of single substrate(maximum 58.61%). The removal rates of CODCr were 25.0% and 28.0% of co-substrates during two SRT, better than those of mono-substrate(which only had 10.2% and 13.1%). The average ρ(NH4+-N) and ρ(TP) of co-substrates were 278.5, 254.9 mg/L and 168.6, 175.9 mg/L, which were higher than 215.6, 213.5 mg/L and 129.2, 152.2 mg/L of mono-substrate. Co-substrates can optimize C/N of substrates and promote the performance of anaerobic digestion and biogas production.
Key words:  sludge  waste straw  co-digestion  solid retention time(SRT)  methane