Experimental Study Of Purification Lampblack Waste Gas With Biological Filtration Method

In recent years, lampblack was classified as "three killer" of the urban air pollution together with industrial pollution and vehicle exhaust emission. Furthermore, the complaints about lampblack emission problems accounts for 30～40% cases of environmental complains in the domestic large and medium-sized cities already, which had caused serious influence of the ecological environment and human health. This test used biological filtration method processing lampblack, including Strains screening, Optimization of strains growth and degradation condition, Operation of the biological filter tower, The influence factors of degradation efficiency, The actual application feasibility analysis and so on. The conclusions as follows:(1)Six isolated strains were sieved out from the enrichment bacteria levitation liquid (four bacteria, a mould and antinomies). Then sieved again, the results showed which single colonies and composite colonies processing efficiency higher were b4 and b1+m1, and the degradation efficiency were 50.65% and 51.06%, they growth in good condition also.(2)Optimized the growth condition and degradation conditions of strains b4 with the beef anointed-peptone medium and the liquid choose medium. The results showed that the best growth condition of strains b4 was 2.0g/L beef anointed,5.0g/L peptone and when the wave bed speed was 150r/min.And the best degradation condition of strains b4 was pH5.0, the cooking oil content was 3.0g/L, the degradation time was 32h and the degradation temperature was 30℃.(3) The biological filtration tower start need 10 days, this means the system runs stably after 10 days, and the exhaust removal efficiency of lampblack kept more than 90% after this time. During this time, the pH downed slowly as time increased, that means organic acid concentration increased on the packing surface. The orders of magnitude of total biomass could achieve 108 every milliliter, and the system was running well at this time.(4) When the system was stable running, the degradation efficiency kept more than 90% when the concentration of inlet below 80.0mg/m3 or the flow of inlet below 650L/h. The degradation efficiency was best when the moisture content of packing was 75%. The impact resistant load effect of system was good also.(5) This process can fully satisfy dweller building and medium-sized restaurant's demand of lampblack waste gas processed. The probably areas were 25.7 m2 and 28.6 m2, which means that the degradation of lampblack exhaust was probably for dweller building and medium-sized restaurant with biological filtration method.