研究了硫酸盐还原菌(sulfate-reducing bacteria,SRB)Desulfovibrio sp.CMX在不同pH值、碳源、初始硫酸根(SO42-)浓度条件下的脱硫能力,并研究了D.sp.CMX在不存在SO42-的情况下的Fe(Ⅲ)EDTA(EDTA:乙二胺四乙酸)还原能力.结果表明,在pH=7,碳源为乳酸钠时,D.sp.CMX的脱硫效果最好.SO42-的初始浓度越大,60 h时的SO42-去除率越低.在不存在SO42-的情况下,D.sp.CMX可以直接将Fe(Ⅲ)EDTA生物还原成Fe(Ⅱ)EDTA,在Fe(Ⅲ)EDTA的浓度达到25 mmol/L时,菌株的铁还原率仍可达到62.51％.但是,随着Fe(Ⅲ)EDTA浓度的升高,D.sp.CMX的生长量下降.通过此阶段的研究,为进一步进行化学吸收结合生物还原同步脱硫脱硝实验研究提供了理论依据.
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