猪粪堆肥过程中金霉素去除及重金属形态变化

发布时间：2018-03-10 22:07

本文选题：猪粪　切入点：好氧堆肥　出处：《环境科学》2017年10期 　论文类型：期刊论文

【摘要】：抗生素和重金属的广泛使用导致了畜禽粪便中抗生素和重金属的大量残留,堆肥工艺不但可降解残留的抗生素,也能固化重金属.本文以养殖场猪粪为对象,利用中试好氧堆肥反应装置,研究不同金霉素浓度时的猪粪堆肥特性及去除情况[0mg·kg~(-1)(CK)、10 mg·kg~(-1)(T1)和50 mg·kg~(-1)(T2)],同时开展堆肥过程重金属形态变化的研究.结果表明,堆肥结束后,CK组金霉素没有检出,T1和T2组抗生素降解率分别达到96.31%和97.32%,金霉素降解过程符合一级动力学模型.堆肥可以使重金属固化,Cu、Zn元素的生物可利用态(可交换态、可还原态)逐渐转化为生物毒性低的可氧化态与残渣态,Cu、Zn明显钝化.相关性分析表明金霉素的去除与生物可利用态Cu、Zn呈现显著的正相关性.
[Abstract]:The widespread use of antibiotics and heavy metals has led to a large number of residues of antibiotics and heavy metals in livestock and poultry feces. Composting process can not only degrade the residual antibiotics, but also solidify heavy metals. The characteristics and removal of pig manure compost with different concentrations of chlortetracycline (0 mg 路kg ~ (-1)) and 50 mg 路kg ~ (-1) C ~ (-1) were studied by a pilot aerobic composting reactor. The changes of heavy metal forms during composting were also studied. After composting, the degradation rates of chlortetracycline in T 1 and T 2 groups were 96.31% and 97.32, respectively. The degradation process of chlortetracycline was in accordance with the first-order kinetic model. The reduction state) was gradually transformed into oxidized and residual Cu _ (Zn) with low biotoxicity. The correlation analysis showed that the removal of chlortetracycline was positively correlated with the bioavailable Cu _ (2 +) Zn.
【作者单位】：哈尔滨工业大学市政环境工程学院城市水资源与水环境国家重点实验室;
【基金】：国家自然科学基金项目(51578182)
【分类号】：S141.4;X70

【相似文献】