论文部分内容阅读
利用纯二氧化锰在微酸性条件下对异化金属还原菌进行驯化,二氧化锰的颜色由黑色逐渐变浅至白色,X射线衍射分析表明微生物可有效还原二氧化锰成为碳酸锰;以发酵制氢废液为还原底物,利用异化金属还原菌在不同酸性条件下直接浸出低品位软锰矿,通过单因素实验研究厌氧条件、pH值对锰浸出率的影响,并对制氢废液化学需氧量(COD)的去除率及浸出机理进行研究.结果表明,异化金属还原菌利用发酵制氢废液还原软锰矿,厌氧浸出优于好氧浸出,最佳pH值为3.0～3.5,浸出时间为3 d时,最大浸出率达到98%;用软锰矿对发酵制氢废液在微酸性条件下进行降解,COD质量浓度为2612 mg.L-1时最大去除率达到84%,COD去除率随软锰矿量的增加而增大.
The use of pure manganese dioxide in the slightly acidic conditions domestication of metal-reducing bacteria, manganese dioxide color gradually lightened from black to white, X-ray diffraction analysis shows that microorganisms can effectively reduce manganese dioxide to manganese carbonate; fermentation Hydrogen waste liquid is a reducing substrate, and the low-grade pyrolusite is directly leached by the dissimilatory metal-reducing bacteria under different acidic conditions. The effect of anaerobic conditions and the pH value on the manganese leaching rate is studied through a single factor experiment, and the hydrogen waste liquid chemistry (COD) removal rate and leaching mechanism were studied.The results showed that the dissimilatory metal reducing bacteria reduced the pyrolusite by fermentative hydrogen production wastewater, the anaerobic leaching was better than the aerobic leaching, the optimum pH was 3.0-3.5, The leaching time of 3 d, the maximum leaching rate of 98%; with pyrolusite fermentative hydrogen waste was degraded slightly acidic conditions, COD mass concentration of 2612 mg.L-1, the maximum removal rate of 84%, COD Removal rate increases with the increase of pyrolusite.