【摘要】 以粉煤灰为主要原料,采用蒸汽养护法,研制了一种能有效去除硫化氢的营养生物填料;比较了该填料与基础填料和传统陶粒的挂膜速度,并考察了硫化氢的进气浓度、进气负荷和停留时间对硫化氢去除效率的影响。结果表明,营养填料可在10 d内成功挂膜。在硫化氢进气质量浓度低于460 mg/m~3,进气流量为0. 6 m~3/h的情况下,硫化氢去除效率可达90%以上;当硫化氢停留时间在28. 3～33. 4 s,进气流速为0. 55～0. 65 m~3/h时,其去除效率达99%以上。系统在运行过程中,免烧营养填料的酸缓冲能力和耐冲击性能良好。更多还原

【Abstract】 The present paper intends to examine and trace the removal effect of the high content concentrations of hydrogen sul-fide by a biofilter filler made of fly ash. For this purpose,we have managed to make ready a novel biofilm carrier with the steam curing or treating method and the optimalized constituents of the biofilm carrier include 8% of fly ash,1. 2% of cement,and 0. 2% of lime stone,and 0. 25% of plaster,with the sodium sulphate anhydrous being of 0. 125% and 0. 2% of the biomass ash. Furthermore,in the carrier maturation process,10 mL of trace element has been aided to the nutrient solution containing respectively NH₄ Cl 0. 4 g/L; MgSO₄·7 H₂ O 0. 8 g/L; KH₂ PO₄4. 0 g/L,along with 10. 0 g/L of glucose; 3. 0 g/L of tryptone and 1. 0 g/L of yeast extract. As the same time,the paper has also worked out the basic carrier of deionized water in the maturation process,whose general physico-chemical features may include pH particle size,specific surface area,water absorption rate,and pressure strength of the cylinder of the nutrient biofilm carrier. Meanwhile,the basic features of the carrier were tested and compared with the traditional ceramic filler. Thus,the results of our experimental test prove that the biofilm carrier tends to be a little bit different as the basic filler in terms of the above selected indicators. Nevertheless,as compared with the basic carrier and the traditional ceramsite carrier,it has been found well functionalized merely 10 days later from its incubation in the H₂ S removing system with the nutrient biofilm carrier（ incubated with the activated sludge）. This ought to be made possible due to the strong nutrient release capacity（ whose total phosphorus rate is 0. 386 3 mg/g and the total nitrogen content rate is 0. 076 4 mg/g at 15 th day） resulted due to the low temperature maturation process. On the other hand,the great specific surface area（ 13. 499 m²/g） of the biofilm carrier should also be in favor of the nutrient release so as to promote the microbe growth. For,with the prepared biofilm carrier,it would be possible to push the H₂ S removing efficiency up to 90% in case the inlet H₂ S concentration can be kept below 460 mg/m³ and the inlet flow-0. 6 m³/h. For,under the conditions of 28. 3-33. 4 and the residence time of 0. 55-0. 65 m³/h for inlet flow,and the maximum H₂ S removal efficiency can be expected to reach 99%. Further studies we have made also reveal that the system enjoys nice tolerance for the fluctuation of pH value and pollutant loads.更多还原