摘要
以高含固污泥为研究对象,采用微波协同酸预处理该污泥,然后利用鸟粪石法去除超过相应浓度的氨氮,研究不同浓度氨氮对污泥厌氧产酸的影响。结果表明:氨氮浓度超过500 mg·L^(-1)时可以满足厌氧发酵微生物增殖生长的需要;鸟粪石法去除高含固污泥发酵液中过量的氨氮可以达到提高发酵产酸产量的目的,最高可达6 521.95 mg·L^(-1);半抑制浓度条件下,发酵过程中NH_4^+-N对厌氧发酵微生物均有不同程度的抑制,丙酸盐降解菌和异丁酸盐降解菌具有更为明显的抑制作用;未处理条件下可知随着NH_4^+-N浓度的上升,产氢产乙酸菌群和同型产乙酸菌群不仅受到抑制,且菌群间的互营机制可能也遭到不同程度的破坏。
Preprocess the high-solid sludge by microwave-acid method,then the ammonia nitrogen of corresponding concentration was removed by struvite precipitation method,the effect of ammonia concentration on anaerobic digestion via sludge was indicated in this study.This study investigated that can meet the needs of anaerobic fermentation microbial growth when ammonia nitrogen concentration exceeding 500 mg·L（-1）.Struvite precipitation method can achieve the purpose of improving VFAs production,the TVFAs was up to 6 521.95 mg·L（-1）.In the IC50 ammonia inhibition state,NH_4＋-N has different inhibition action on anaerobic microbial,especially propionate-degrading bacteria and isobutyrate-degrading bacteria.With rise in NH_4＋-N concentration,not only homoacetogens and syntrophic acetogens were suppressed,but also the homoacetogens/syntrophic acetogens synergism was damaged in varying degrees.
出处
《环境工程学报》
CAS
CSCD
北大核心
2017年第5期3091-3098,共8页
Chinese Journal of Environmental Engineering
基金
江苏省产学研联合创新前瞻性研究项目(BY2014037-25)
关键词
高含固污泥
氨氮抑制效应
鸟粪石法
产氢产乙酸菌
同型产乙酸菌
high-solid sludge
ammonia-nitrogen inhibition
struvite precipitation method
syntrophic acetogens
homoacetogens
