Wang Aijie, Ren Nanqi, Wang Xu, Lee Duujong
School of Municipal & Environmental Engineering, Harbin Institute of Technology, P.O. Box 2614, 202 Haihe Road, Harbin 150090, China.
J Hazard Mater. 2008 Jun 15;154(1-3):1060-5. doi: 10.1016/j.jhazmat.2007.11.022. Epub 2007 Nov 17.
Sulfate reduction in a continuous flow, acidogenic reactor using molasses wastewater as the carbon source was studied at varying chemical oxygen demand/sulfate (COD/SO4(2-)) ratios. At a critical COD/SO4(2-) ratio of 2.7, neither COD nor sulfate were in excess for extra production of ethanol or acetate in the reactor. An acetic-type microbial metabolism was established with sulfate-reducing bacteria (SRB) significantly consuming hydrogen and volatile fatty acids produced by acidogenic bacteria and hydrogen producing acetogens in degrading COD, thereby yielding sulfate removal rate>94.6%. A low critical COD/SO(4)2- ratio of 1.6 was also observed with the enriched ASRB population in reactor which overcomes the barrier to the treatment capability of sulfate-laden wastewater treatment with limited COD supply.
在连续流、以糖蜜废水为碳源的产酸反应器中，研究了在不同化学需氧量/硫酸盐（COD/SO4(2-)）比率下的硫酸盐还原情况。在2.7的临界COD/SO4(2-)比率下，反应器中用于额外生产乙醇或乙酸盐的COD和硫酸盐均不过量。建立了一种乙酸型微生物代谢，硫酸盐还原菌（SRB）在降解COD时显著消耗产酸菌和产氢产乙酸菌产生的氢气和挥发性脂肪酸，从而使硫酸盐去除率>94.6%。在反应器中富集的ASRB菌群中还观察到低至1.6的临界COD/SO(4)2-比率，这克服了在有限COD供应下处理含硫酸盐废水的处理能力障碍。
