高蛋白有机废弃物厌氧消化系统稳定性及其耐氨氮机制解析

发布时间：2018-03-23 13:18

本文选题：高蛋白有机废物　切入点：厌氧消化　出处：《环境科学学报》2016年07期

【摘要】：病死及自然灾害产生的大量畜禽尸体的不恰当处理处置会带来较为严重的环境卫生和公众安全隐患.本研究利用厌氧消化技术对畜禽尸体这类高蛋白有机废弃物的无害化处理进行尝试,旨在探索其适宜的有机负荷条件、系统的稳定性及潜在的氨抑制风险.研究表明高蛋白有机废物(以猪肉作为实验样品)作为厌氧消化基质时,系统稳定运行的有机负荷能够达倒(4.76±0.41)kg·m~(-3)·d~(-1);同时,VS降解率、单位体积沼气产率、单位添加VS沼气产率、单位降解VS沼气产率以及甲烷含量分别能达到95%、(3.72±0.21)L·L~(-1)·d~(-1)、(0.78±0.02)m~3·kg~(-1)、(0.82±0.02)m~3·kg~(-1)以及65%.在该条件下,TAN和FAN的浓度与系统产气性能没有直接线性关系,且在浓度高达5700 mg·L~(-1)和700 mg·L~(-1)时未呈现对系统的明显抑制作用.454高通量焦磷酸测序法对系统内古菌种群相对密度的分析结果表明,系统中氨抑制问题得到一定程度的缓解或者消除的原因可能为甲烷八叠球菌属(Methanosarcina)的优势地位并未受到明显影响,以及整个产甲烷菌种群在系统运行过程所得到的明显驯化.
[Abstract]:Improper disposal of a large number of animal carcasses caused by diseases and natural disasters will bring serious environmental hygiene and public safety risks. This study used anaerobic digestion technology to treat high protein organic wastes such as animal carcasses. To try out the innocuous treatment, The aim of this study is to explore the suitable organic loading conditions, the stability of the system and the potential ammonia inhibition risks. Studies have shown that high protein organic wastes (using pork as experimental samples) are used as anaerobic digestible substrates. The organic load of stable operation of the system can reach 4.76 卤0.41)kg / m ~ (-3) DU ~ (-1) D ~ (-1), and at the same time, the degradation rate of vs, the yield of biogas per unit volume, the yield of biogas per unit added vs, the yield of biogas per unit of added vs can be obtained. The biogas yield and methane content per unit degradation of vs can reach 95% 卤0.21 L L ~ (-1) L ~ (-1), respectively. Under these conditions, there is no direct linear relationship between the concentration of Tan and FAN and the gas production performance of the system, under these conditions, 0.78 卤0.02)m~3 路kg ~ (-1) ~ (-1) ~ 0.82 卤0.02)m~3 ~ (-1) 路kg ~ (-1) 路L ~ (-1) 路L ~ (-1) ~ (-1) ~ (-1) ~ 0.78 卤0.02)m~3 ~ (-1) 路L ~ (-1) 路L ~ (-1), respectively. When the concentrations were as high as 5700 mg / L ~ (-1) and 700 mg / L ~ (-1), there was no obvious inhibitory effect on the system. To some extent, the ammonia inhibition problem can be alleviated or eliminated because the dominant position of Methanosarcina has not been significantly affected, and the whole methanogenic bacteria has been obviously domesticated during the operation of the system.
【作者单位】：同济大学污染控制与资源化研究国家重点实验室;
【基金】：低碳型分质供排水和废物资源化系统应用研究(No.2012DFG91380) 村镇生活垃圾处理与资源化利用关键技术研究与示范(No.2014BAL02B02)~~
【分类号】：X713

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