| 利用嗜酸性硫杆菌的生物产酸作用处理洗毛废水 |
| 摘要点击 2045 全文点击 1911 投稿时间：2006-02-21 修订日期：2006-04-12 |
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| 中文关键词 洗毛废水 生物产酸 嗜酸性硫杆菌 COD去除 |
| 英文关键词 woolscouring effluent bio-acidification Acidophilic thiobacillus COD removal |
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| 中文摘要 |
| 利用洗毛废水在低pH条件下,有机物絮凝沉降的特点,通过嗜酸性硫杆菌(Acidophilic thiobacillus)的产酸作用降低体系pH,破坏废水固有的稳定性,改变有机物的亲水性能,实现固液分离,达到去除COD的目的.试验结果表明，生物产酸作用能有效地去除废水COD,改善其脱水性能.当体系pH降至3.00, COD去除率达到最大值91.4%,处理后的废水有很好的机械脱水和沉降性能,比阻从大于9.81×1013 m·kg-1降至5.60×1011 m·kg-1.而对照处理在整个培养期内,未发生明显的改变,仅有20%的COD被去除.本研究为油脂含量高、难被生物利用的有机废水提供了一条新的处理方法. |
| 英文摘要 |
| Suspended solids dispersed in woolscouring effluent(WSE) could be flocculated and precipitated in low pH.The aim of this study is to decrease pH in WSE,result in liquid-solid separation and remove COD of WSE through bio-acidification of Acidophilic thiobacillus.Acidophilic thiobacillus TS6 and sulfur powder as energy substance were inoculated and added into WSE for incubation in shaker at 180 r／min and 30℃ for 12 d.The results showed that suspended solids in WSE would flocculate and precipitate spontaneously and rapidly when pH in WSE drops to 3.00 due to bio-acidification.As a result,91.4% of COD could be removed through consequent liquid-solid separation.Throughout the experiment,the control without inoculated with Acidophilic thiobacillus only led to 20% of COD removed.Furthermore,dewaterability of the sediment or dreg in bio-acidification treatment was enhanced markedly,as indicated by the decline of its specific resistance from more than 9.81×1013 m·kg-1 to 5.6０×1011 m·kg-1.It seemed that bio-acidification approach might be an attractive treatment method for the organic wastewater of high wax content or high suspended solids content. |
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