两相厌氧消化反应器设计及启动方法

Design of Two-phase Anaerobic Digester and Start-up Method

本文设计应用UASB和EGSB 2种反应器进行串联耦合处理猪粪废水。由于产氢产乙酸菌和产甲烷菌繁殖特性的差异性,传统的厌氧消化工艺并不能使其发挥各自的优势。两相厌氧消化工艺可以使2个反应在各自最适宜的环境内进行厌氧发酵,由于产氢产酸和产甲烷2个阶段相互独立,故酸化反应器具有一定的缓冲作用,能够缓解冲击负荷对后续产甲烷反应器的影响,可以提高厌氧消化的反应效率。试验设计的目的在于将产氢气与产甲烷两相耦合起来,并探讨运行参数对猪粪两相厌氧消化的影响,同时为两相厌氧工艺的实施提供参考。

In this paper, two digester （UASB and EGSB ）were series-coupled, which were designed and applied to treatment of pig manure wastewater.Due to the difference of reproductive characteristics between obligate H2-producing acetogenic bacteria and methanogens,the traditional anaerobic fermentation process is not beneficial for methanogens and the obligate H2-producing acetogenic bacteria.Two-phase anaerobic process make the two anaerobic process in the more suitable for different fermentation.Due to the two stage of the producing acid and methane are independent and simultaneous, the acidification digester has a certain buffer action.It can alleviate the impact of shock load on the subsequent methane production digester, so the reaction rate of anaerobic digestion can be improved.The purpose of this experiment is to couple the hydrogen and methane together, and to discuss some factors on the effect of pig manure two-phase anaerobic fermentation. It＇s hoped to find the optimal anaerobic fermentation conditions in order to maximize the energy conversion efficiency of raw materials, and to provide a reference for the implementation of two-phase anaerobic process.