| The object of this study is try to improve the performance of anaerobicbiological treatment process by the way of high performance filling elementpreparation and anaerobic microorganisms culture.In this paper, the fly-ash is used to completely replace clay for preparing highperformance ceremsite with high specific surface, plenty porosity, good biologicalendophilicity and enough strength by adding manometer materials. The organicwastewater treatment process with this kind of ceremsite can not only make good useof waste but also has profound environmental significance. Meanwhile, it can alsosave farming and resources. In addition, the high performance anaerobic microorga-nism can shorten the process of biomembrane formation, enhance the removal rateand make the system run steadily.From the preparation experiment, we find that the optimal formula ratio of theadditives is fly-ash 50g, lime 20g, cement 15g,DT-5 1g,γ-Al2O3 1.5g, gypsum 1.5g,NaHCO3 15g. The SEM photos show that the specific surface of unbaked fly-ashceremsite can research 27.2350 m2/g. Compared with the traditional ceremsite withspecific surface 4.11 m2/g and the unbaked clay ceremsite with 16.17 m2/g, thespecific surface of the unbaked fly-ash ceremsite enlarges 6.6 times and 1.7 times,respectively. At the same time the photos also show that the surface is very rough andhas many slight holes. It can be effectively resistant to the acid and alkali and isdurable. A lot of microorganism can be adhered on it. All of these advantages aboveshow that the unbaked fly-ash ceremsites is suitable to the anaerobic filter(AF) as akind of good carrier of microorganism.The applied experiment shows that the special anaerobes are better than ordinarysludge. The process of biofilm colonization in AF can be completed in 8 days byusing the special anaerobes, but 10 days by using common sludge and 33 days byusing domestic ceremsite. In the situation of using special anaerobes, when the CODof the wastewater inflows and HRTs are 5214 mg/L and 96 h, 2074 mg/L and 48 h,423 mg/L and 6 h , the COD removal efficencies are 97.3％, 86.1％and 64.8％,respectively. Compared with it, in situation of using ordinary sludge, when the COD of the wastewater inflows and HRTs are 4726 mg/L and 96 h, 1986 mg/L and 48 h,552 mg/L and 6 h , the COD removal efficencies are 92.6％, 81.2％and 48.9％,respectively.Kinetics experiments reveal that the degeration rate of COD in AF is first-gradereaction to its concentration. when the COD of wastewater is 423mg/L.theexperiential equation is rCOD=-(dCCOD)/(dt)=0.152CCOD(mg/l·h). |
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