污泥与菌渣协同消化对微生物的影响分析

Analysis of the effect of sludge and fermentation dregs co-digestion on microorganisms

抗生素菌渣是一种危险废物,处置不当极易造成环境风险。本研究将市政污水处理厂二沉池剩余污泥与青霉素生产菌渣(青霉素残留量1.09±0.58mg/g)进行协同处理,并检测了填埋样品中青霉素残留,分析了微生物的PCR-DGGE指纹图谱及丰度变化。结果表明,协同填埋处理可加快青霉素的降解,但会对样品中微生物多样性与结构产生一定的潜在影响,主要表现为青霉素抗性菌丰度的增加以及土族微生物群落结构的改变。

Antibiotics fermentation dregs was grouped into the hazard solid waste in China.The inappropriate treatments on antibiotics fermentation dregs would cause ecological hazard and environmental pollution.In this study,the residual sludge from the secondary sedimentation tank of municipal wastewater treatment plant and the penicillin fermentation dregs(wet,containing 1.09±0.58mg/g penicillin residues)were mixed for co-digestion.Penicillin residues in samples was detected,the PCR-DGGE fingerprint and abundance changes of microorganisms were analyzed.The results showed that the co-digestion could accelerate the degradation of penicillin,but had a potential impact on microbial diversity and structure,such as the increased abundance of the penicillin-resistant bacteria and the change of the metabolic patterns.