城市污泥厌氧发酵残渣热解制备生物炭及其氮磷吸附研究

发布时间：2019-02-18 22:23

【摘要】：以污泥发酵前后的残渣热解制备生物炭,考察发酵前后污泥生物炭的物理性能及其对氨氮、总磷的吸附能力。实验结果表明污泥发酵有利于生物炭孔隙结构的发展,污泥发酵后制备的生物炭(FSBC)比表面积、孔体积均高于未发酵污泥制备的生物炭(SBC)。吸附实验结果表明,对于磷酸盐的吸附,3种材料吸附能力大小为FSBCSBCCAC,对于氨氮的吸附,吸附能力顺序为CACFSBCSBC,污泥发酵后制备的生物炭对氨氮和总磷的吸附能力较未发酵污泥生物炭明显增强。对于实际废水中氮、磷的吸附,其去除率顺序均为CACFSBCSBC,其中CAC和FSBC对总磷的去除率分别为31%和27%,对氨氮的去除率则分别为7%和4%。FSBC与CAC对总磷和氨氮的去除率相差不大。FSBC作为污泥资源化得到的低成本吸附剂,有广阔的研究前景。
[Abstract]:Biochar was prepared by pyrolysis of sludge residue before and after fermentation. The physical properties of sludge biochar before and after fermentation and its adsorption capacity for ammonia nitrogen and total phosphorus were investigated. The results showed that sludge fermentation was beneficial to the development of biochar pore structure. The specific surface area and pore volume of (FSBC) prepared by sludge fermentation were higher than those of unfermented sludge. The results of adsorption experiments show that for phosphate adsorption, the adsorption capacity of the three materials is FSBCSBCCAC, for ammonia nitrogen, and the order of adsorption ability is CACFSBCSBC,. The adsorption of ammonia nitrogen and total phosphorus by activated sludge biochar was significantly enhanced than that of unfermented sludge biochar. For the adsorption of nitrogen and phosphorus in actual wastewater, the order of removal efficiency is CACFSBCSBC,. The removal rates of total phosphorus by CAC and FSBC are 31% and 27% respectively. The removal rate of ammonia nitrogen was 7% and the removal rate of total phosphorus and ammonia nitrogen by 4%.FSBC and CAC was not different. As a low-cost adsorbent for sludge resource utilization, FSBC has a broad research prospect.
【作者单位】：江南大学环境与土木工程学院;江苏省水处理技术与材料协同创新中心;
【基金】：十二五水专项:企业退出区湖滨环境生态重建技术示范(2012ZX07101-013-04/014) 江苏省产学研联合创新资金(BY2014023-03) 江苏省普通高校研究生科研创新计划项目(KYLX_1162)~~
【分类号】：X703

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