光合细菌（PSB）处理明胶废水中填料挂膜性能研究
Study on property of biofilms on diffrent carriers in treating gelatin wastewater by photosynthetic bacteria (PSB)
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摘要: 分别以纤维填料和毛刷填料为载体，采用优势菌种挂膜法，利用光合细菌处理明胶生产过程中产生的磷钙废水。两种填料表现出不同的挂膜效果，综合比较二者的挂膜时间、最终COD去除率和TP含量后得出毛刷填料挂膜性能优于纤维填料，其挂膜时间为23 d，最终COD去除率和TP含量分别达到93%, 2.8 mg/L ，在磷钙水处理中有适应性。通过对2种填料的电镜分析，发现纤维填料表面挂膜前后没有变化且十分光滑，而毛刷填料挂膜前表面粗糙，挂膜后表面有鳞片状突起，粗糙的表面状况有利于光合细菌的附着，最终促进生物膜功效的发挥。废水中Ca2+和pH是影响填料挂膜的主要因素。Abstract: The effect of treating phosphorite water genarated in gelatin production by photosynthetic bacteria was investigated. Photosynthetic bacteria was carried in fiber carrier and brush carrier, respectively.The method used was culturing membrane by the advantageous strain.Considering the membrane culturing time，removal rate of COD and the ultimate concentration of TP, the effect of using brush carrier was better than fiber carrier.And for the former, the membrane culturing time was 23 days,the removal rate of COD and the ultimate concentration of TP were 93% and 2.8 mg/L,respectively.The brush filler was more applicable to phosphorite water treatment. Acording to the SEM results,the surface of brush filler was rough before membrane culturing and scaly after membrane culturing.No apparent chang was found for fiber filler both before and after membrane culturing ,and its surface was very smooth.This indicated that rough surface was more easier to attach for photosynthetic bacteria,which influences the effect of biofilm. The concentration of Ca2+ and pH value of wastewater were two dominant factors that infuence the effect of membrane culturing in filler.
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Key words:
- phosphorite water /
- photosynthetic bacteria /
- carrier
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