过二硫酸盐提升奶牛养殖废水厌氧消化产甲烷性能研究

doi:10.12377/1671-4393.21.11.13

摘要/Abstract

摘要： 厌氧消化是实现奶牛场养殖废水资源化、无害化的常见处理方法,而传统厌氧消化的水解效率低,是影响厌氧消化推广应用的主要限制因素。结果表明,通过投加适量过二硫酸盐（Perdisulfate, PDS）能够有效提升奶牛养殖废水产甲烷效果与沼液的植物可利用性。在PDS投加量3.4 g/L时,产甲烷量提升最为明显,相较于未投加PDS的对照处理组,甲烷产量提升了130.00%。进一步对PDS提升厌氧消化产甲烷机理进行研究,结果表明,PDS投加能有效提高挥发性脂肪酸（Volatile Fatty Acids,VFAs）产量,其中乙酸产量的提高有利于乙酸型产甲烷过程。对试验样品的高通量测序证实了PDS处理提高了乙酸型产甲烷菌的相对丰度,PDS促进乙酸型产甲烷过程是提高甲烷产量的重要原因。

关键词: 奶牛养殖废水, 厌氧消化, 过二硫酸盐（Perdisulfate, PDS）, 甲烷产量, 微生物

Abstract: Anaerobic digestion is an effective method for energy recover and harmless treatment of dairy wastewater. It is the low methane production that is limiting the popularization and application of anaerobic digestion. Experimental results showed that appropriate dosage of perdisulfate （PDS） could effectively improve the methane production of dairy wastewater. When PDS/TSS was about 0.1, the methane production increased most significantly. Compared with the control group（CK）, the methane production increased by 130.00%. The results indicated that PDS can effectively improve the yield of volatile fatty acids （VFAs）. The increase of acetic acid yield is conducive to the acetic acid type methanogenesis process. High throughput sequencing confirmed that PDS increased the relative abundance of acetic acid methanogens. Promoting the process of acetic acid methanogenesis may be an effective way to improve methane production.

Key words: dairy wastewater, anaerobic digestion, perdisulfate, methane production, microbial

王婷婷, 唐鑫, 孙英. 过二硫酸盐提升奶牛养殖废水厌氧消化产甲烷性能研究[J]. 中国乳业, 2021, 0(11): 92-99.

WANG Tingting, TANG Xin, SUN Ying. Study on the Improvement Effect of Perdisulfate on Anaerobic Methane Production of Dairy Wastewater Methane Production[J]. China Dairy, 2021, 0(11): 92-99.

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