摘要
四环素等抗生素残留是畜禽养殖粪便处理中存在较严重的问题,作者研究了四环素在厌氧发酵过程中的降解及其对厌氧发酵影响。研究表明:四环素对甲烷细菌有抑制作用,当浓度高于400 mg·L-1时,开始出现重度抑制现象;超声预处理可相对降低四环素等抗生素类药物对甲烷细菌的抑制作用,提高产气性能,累计产气量提高了7.28%。超声波预处理、及曝气后处理都能提高四环素的降解率,可分别提高0.8%,1.23%。四环素浓度在900 mg·L-1以下时,均能达到93%以上的降解率,沼液中残留浓度很低,但沼渣中有较大残留量。
Livestock manure has a serious problem with tetracycline antibiotic residues.The effect of tetracycline concentration on the daily gas production,cumulative gas production,as well as tetracycline degradation in livestock manure anaerobic process,was investigated.The analysis showed that tetracycline could inhibit methanogenic bacteria.When tetracycline concentration was higher than 400 mg· L-1,severe inhibition was appeared.Ultrasonic pretreatment may relatively reduce the inhibition of tetracycline antibiotics on the methanogenic bacteria and improve the performance of gas production with a cumulative gas production increase of 7.28％ comparing with the control.Both ultrasonic pretreatment and aeration post-treatment could increase the degradation rate of tetracycline,increased by 0.8％,1.23％ respectively.The tetracycline degradation rate could reach more than 93％ if its concentration was below 900 mg · L-1.The tetracycline concentration was low in biogas slurry,but quite high in biogas residue.
出处
《中国沼气》
北大核心
2014年第1期23-26,共4页
China Biogas
关键词
四环素
厌氧发酵
沼渣沼液
超声波处理
tetracycline
anaerobic fermentation
biogas slurry
biogas residue
ultrasonic treatment
