铁盐投加对模拟污水管道系统H2S控制(2)
时间:2013-12-10 11:03 文章来源:http://www.lunwenbuluo.com 作者:王怡等 点击次数:
从表4可知,投加铁盐后污水中可测到的以S2-存在的仅占总硫的1.45%,95.30%是以SO42-形式存在的,因此,铁盐确实能够抑制SRB将污水中的SO42-转化为硫化物,从而可以控制污水中的硫酸盐转化为H2S气体。
综合表3、表4,可以看出铁盐投加明显抑制了模拟污水管道中的SRB活性,使污水中的硫95.30%仍以SO42-形式存在,FeS份额很低,污水中可检测到S2-仅占总硫的1.45%。
3结论
室温下通过向模拟污水管道反应器投加铁盐,发现采用合成生活污水在Fe3+投加浓度30mg/L时,反应器中液相S2-浓度平均低于1mg/L,各反应槽中H2S气体浓度平均未超过40ppm,远低于控制反应器,因此,铁盐投加可有效抑制S2-的产生和H2S气体的释放。此外,静态试验结果表明,以上条件投加的铁盐,可抑制大约95.30%的硫不被还原,但是约有44.00%的铁转化为磷酸铁。
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