MgFe类水滑石法强化混凝深度处理猪场尾水及混凝污泥特性研究

发布时间：2018-06-14 13:47

  本文选题：MgFe类水滑石 + 强化混凝　； 参考：《农业环境科学学报》2017年11期

【摘要】：为了深度处理经二级生化处理后的猪场尾水,采用Mg Fe类水滑石法强化混凝猪场尾水。考察了不同pH值、Mg与Fe摩尔配比[n(Mg∶Fe)]等混凝条件对猪场尾水常规指标以及其中微量重金属[Zn~(2+)、Cu~(2+)、Cr(Ⅵ)]和兽用抗生素(磺胺甲基异恶脞,SMX)等去除效果的影响,并利用X射线衍射(XRD)、扫描电镜(SEM)和傅立叶转换红外(FTIR)等技术对混凝污泥特性进行分析,制备了催化材料,进行了混凝污泥资源化利用初探。结果表明:当猪场尾水初始pH6.5时,TP、浊度和Cr(Ⅵ)去除率分别在95%、80%和35%以上。当初始pH值进一步调节至大于8.0时,MgFe类水滑石对Zn~(2+)和Cu~(2+)去除率可达85%以上,对SMX去除率在75%以上;Mg与Fe摩尔配比对各水质指标去除效果影响不大。混凝污泥主要形成的矿物相有类水滑石与磷酸铁矿物。通过煅烧混凝污泥制备高级氧化催化剂,发现在相同过硫酸氢钾(PMS)投加量的条件下,700℃限氧热解混凝污泥制得的催化剂比同条件下利用人工合成MgFe类水滑石制得的催化剂具有更高的催化活性。研究结果可为养猪处理废水与混凝污泥资源化利用研究提供支持。
[Abstract]:In order to further treat the pig farm tailings after secondary biochemical treatment, the mg Fe hydrotalcite method was used to strengthen the coagulated pig farm tailings. The effects of coagulation conditions such as different molar ratio of mg and Fe on the removal of trace heavy metals (Zn ~ (2 +) (Zn ~ (2 +) and sulfamethoxifen (SMX) in the tail water of pig farm were investigated. The effects of coagulation conditions such as mg / Fe molar ratio on the removal efficiency of trace heavy metal (Zn ~ (2 +) ~ (2) and sulfamethoxifen (SMX) were investigated. The characteristics of coagulant sludge were analyzed by means of X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). The catalytic materials were prepared, and the utilization of coagulant sludge was studied. The results showed that when the initial pH was 6.5, the removal rates of TP, turbidity and Cr (鈪，

本文编号：2017601