奶牛场废水抗生素类新型污染物减排示范工程研究成果

Research Findings of Demonstration Project of Emerging Pollutants Reduction for Antibiotics in Dairy Wastewater

针对奶牛场废水中抗生素残留问题,以粪污资源化还田利用为导向,开展了以SBR工艺为核心的废水末端处置关键技术和工艺参数研究,并建设了抗生素类新型污染物污染减排示范工程。通过为期6个月的连续监测结果显示,奶牛场废水经厌氧-好氧生化处理后,磺胺类和β-内酰胺类抗生素去除率稳定在90%以上,在曝气池中投加消化抑制剂(TCMP)可控制氨氮的硝化率为12.5%,有效保留了氮素养分,且对抗生素去除基本无影响。该示范工程抗生素去除模块投资仅占项目总成本的13.5%,污水处理成本≤10元/t,在不大幅增加投资运行成本的情况下,达到了保留畜禽粪污资源化利用价值和新型污染物去除的双重目的。

In order to solve the problem of antibiotic residues in dairy effluent,and return the livestock and poultry excrement to farmland with increased resource utilization rates,key technique and technical parameters based on SBR process as the core of dairy effluent terminal disposal were developed.Meanwhile,a demonstration project of the reduced emergent pollutants of antibiotics was built,and degradation effects of antibiotics were continuously monitored for 6 months.Results showed that removal rates of sulfonamides andβ-lactam antibiotics were above 90%after anaerobic-aerobic biological treatment.By adding digestive inhibitors(TCMP)in aeration tank,nitrifying rate of ammonia nitrogen could be controlled at 12.5%,which effectively retained the nitrogen nutrient without any negative effects on antibiotics removal.Moreover,investment of the designed antibiotic removal module only accounted for 13.5%of the total demonstration project cost,with a maximum effluent treatment cost of 10 yuan/t.This work achieved the dual purposes of retaining the livestock and poultry waste utilization value and effective emergent pollutants removal,with only limited increase in investment and operation costs.