Treatment effect and removal mechanism of AMD heavy metals in aquaculture wastewater
In this paper,the co-treatment process and effect of products from cow manure before and after fermentation and acid mine drainage(AMD)were studied.The results showed that the cow ma-nure and the fermented product(biogas slurry)had different effects on AMD.In the early stage of treatment,the pH values of cow manure group R1 and biogas slurry group R2 increased rapidly from 3.07 to 4.01 and 3.85,respectively,and decreased slightly to 3.91 and 3.47 at the end of the experi-ment.The acidity decreased by 49.8%and 44.83%,respectively.The concentration of Fe,Zn,Cu,Mn and Al in group R1 decreased by 72.34%,83.79%,96.48%,17.2%and 46.89%,respectively.The concentration of Fe,Cu,Mn and Al in R2 group decreased by 96.27%,61.40%,13.92%and 48.19%,respectively.The result of X-ray diffraction(XRD)showed that co-precipitation was the main method for metal removal in the two groups of experiments,but microbe was found to play a sig-nificant role in promoting the treatment process in the R1 group.The two groups of experiments have a good effect on AMD repair,and have a good application prospect in the treatment of AMD by aqua-culture wastewater.
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