洞庭湖区地下水生物除锰试验研究

通过试验 ,研究了洞庭湖区地下水生物除锰滤池的成熟过程与除锰效果 ,探讨了 pH值、氧化还原电位 (ORP)以及亚铁离子 (Fe2 + )与生物除锰的关系。结果表明 ,石英砂滤池除锰能力与砂层细菌含量密切相关 ;在试验进水水质条件下 ,通过自然培养 ,石英砂生物除锰滤池可在 6 0天内培养成熟 ;在 12m/h的较高滤速下 ,生物滤池仍有良好的除锰、除浊效果和很长的过滤周期 ;当出水 pH为 5～ 8.5时 ,出水含锰量小于 0 .1mg/L ,但当pH <5时 ,出水含锰量随进水 pH值的降低而急剧增加 ;当ORP为 4 30～ 72 0mV时 ,生物滤池具有良好的除锰效果 ;Fe2 + 与生物滤池除锰能力密切相关 .

Experimental Research of the Biological Manganese Removal of Dongting Lake Groundwater

Through experiments, we studied the biological sand filter ripening process and the manganese removal of the Dongting lake groundwater, and investigated the relations among the pH value, oxidation-reduction potential (ORP), ferrous ions and biological manganese removal. The manganese removal ability of the sand-filter was closely related to the bacterial content of the filter layer. Under the influent quality conditions, the biological sand-filter was ripened in 60 days with the natural culture of bacteria. At the higher filter-velocity of 12 m/h, the effluent manganese content < 0.1 mg/L. When the pH value < 5, the effluent manganese content grew rapidly with the decrease of pH value. When the ORP < 720 mV, the bio-filter had a good manganese removal. The ferrous ions were closely related to the manganese removal ability of the bio-filter.