制备磷酸铁添加对厌氧发酵产气的影响

Influence of Prepared Iron Phosphate on Anaerobic Fermentation in Biogas

以磷化渣为原料,利用高压溶液法制备磷酸铁,并用X射线衍射仪(XRD)、扫描电子显微镜(SEM),对这种添加剂进行表征。将制备出的Fe PO4添加到厌氧发酵实验,评价其对厌氧发酵影响。结果表明:在实验条件下,制备出磷酸铁的纯度可达99.14%,添加相同量的Fe SO4、Na H2PO4和制备Fe PO4,都可提高产气量,其中制备Fe PO4效果最好,且最佳添加量为5%。制备出的磷酸铁,可增加产气量1 154 m L,产气速率平均提高2倍,且最终沼渣、沼液可作为有机复合肥,不产生二次污染。此方法为磷化渣资源化提供了一种新途径,为提高厌氧发酵产气量提供了一种方法。

The iron phosphate was prepared by the method of high pressure solution by using phosphate slag,and the prepared FePO4were characterized by X ray diffraction(XRD)and scanning electron microscopy(SEM).The prepared FePO4was added to the anaerobic fermentation experiment to evaluate its effect on anaerobic fermentation.The results showed that under the experimental conditions the prepared iron phosphate was at99.14%purity.The same amount of FeSO4,NaH2PO4and prepared FePO4were added for anaerobic fermentation and result showed that all three improved the gas production.Prepared FePO4improved the best and the optimum addition amount was5%.Prepared FePO4could greatly improve the amount of gas production1154mL and gas production rate was double.The final residue biogas slurry can be used as organic fertilizer which will not cause secondary pollution.This method provide a new way of reusing and also a way of promoting biogas production.