不同初始pH值对白菜尾菜与羊粪混合厌氧发酵的影响
Effects of Different Initial PH Values on Mixed Anaerobic Fermentation of Cabbage Tail and Sheep Manure
申岳 1蔡立群 1陈晓龙 1王勇智 1周生虎1
作者信息
- 1. 甘肃农业大学资源与环境学院 甘肃兰州 730070;甘肃省干旱生境作物学重点试验室 甘肃兰州 730070
- 折叠
摘要
探究不同初始pH对白菜尾菜与羊粪混合厌氧发酵的影响,为尾菜沼气工程预处理技术提供理论基础.利用自制小型发酵装置,以白菜尾菜为主要原料,添加适量羊粪防止发酵系统酸化,导致产气停滞,将白菜尾菜与羊粪按总固体含量(TS)2∶1进行混合,设置4个不同初始pH值处理(T1:pH值未调节,pH=7.1±0.1;T2:pH=6.5±0.1;T3:pH=7.5±0.1;T4:pH=8.5±0.1),高温条件下(55±1)℃进行湿式厌氧发酵.研究不同初始pH值对白菜尾菜和羊粪混合发酵过程中产甲烷效能、发酵基质有机质水解、发酵系统稳定性的影响.与T1相比,T3处理能有效增加白菜尾菜与羊粪混合厌氧发酵的产甲烷效能;碱性条件下能进一步促进固态有机物的水解,提高发酵液中有机质含量;各发酵系统均能较稳定运行,更有利于白菜尾菜与羊粪厌氧发酵的进行.本结论可为白菜尾菜沼气化利用提供一定的理论及应用参考.
Abstract
The effects of different initial pH on mixed anaerobic fermentation of cabbage tail and sheep manure were investigated to provide a theoretical basis for the pretreatment technology of vegetable tail methane project.Using a self-made small-scale fermentation device,with cabbage tail as the main raw material,an appropriate amount of sheep manure was added to prevent acidification of the fermentation system,resulting in stagnation of gas production.The cabbage tail and sheep manure were mixed according to the total solid content(TS)of 2:1,and four different initial pH values were set(T1:pH was not adjusted,pH=7.1±0.1;T2:pH=6.5±0.1;T3:pH=7.5±0.1;T4:pH=8.5±0.1),wet anaerobic fermentation under high temperature conditions(55±1)℃.The effects of different initial pH values on methane-producing efficiency,organic matter hydrolysis in fermentation substrate and stability of fermentation system during mixed fermentation of cabbage tail and sheep manure were studied.Compared with T1,T3 treatment could effectively increase the methane production efficiency of mixed anaerobic of cabbage tail and sheep manure.Under alkaline conditions,it can further promote the hydrolysis of solid organic matter and increase the content of organic matter in the fermentation solution.Each fermentation system can operate stably,which is more conducive to the anaerobic fermentation of cabbage tail and sheep manure.This conclusion can provide some theoretical and practical reference for methane utilization of cabbage tail.
关键词
pH值/尾菜/混合发酵/羊粪/甲烷Key words
pH value/vegetable tail/mixed fermentation/sheep manure/methane引用本文复制引用
基金项目
甘肃省教育厅高等学校产业支撑项目(2021CYZC-50)
出版年
2024
NETL
NSTL
万方数据