Aerobic biofilm reactor

Case 3 Leachate Treatment Using an Aerobic Biofilm Reactor. 583... 

The use of an attached growth aerobic biofilm reactor to treat leachate is relatively new. Past studies on anaerobic biofilters showed excellent organic removal up to 90%, and the retention time needed to treat high-strength effluent was between 3 and 5 d. The use of aerobic biofilters using... 

Idris, A. and Abdullah, A.G.L., Leachate Treatment Using Aerobic Biofilm Reactor, Proc. JSPS-VCC Seminar on Water Resource Management, Kota Kinabalu, Malaysia, 2001. 

Von Sperling, M. (2Q01) Activated Sludge and Aerobic Biofilm Reactors Biological Wastewater Treatment, vol. 5, IWA Publishing, London, p. 340. 

Kryst K, Karamanev DG (2001) Aerobic phenol biodegradation in an inverse fluidized-bed biofilm reactor. Ind Eng Chem Res 40 5436—5439... 

Mixed liquor from a municipal WW treatment plant Acid orange 8 Acid orange 10 Acid red 14 Rotating drum biofilm reactor Continuous Aerobic B Drum 22 7... 

A dynamic model has been developed to simulate the behavior of a Pseudomonas sp. 0X1 biofilm reactor for phenol and azo-dye conversion during the aerobic-anaerobic cyclic operation. Phenol and oxygen were considered as the limiting substrates for growth kinetics. 

Industrial hazardous wastewater can be treated aerobically in suspended biomass stirred-tank bioreactors, plug-flow bioreactors, rotating-disc contactors, packed-bed fixed-biofilm reactors (or biofilters), fluidized bed reactors, diffused aeration tanks, airlift bioreactors, jet bioreactors, membrane bioreactors, and upflow bed reactors [28,30]. 

Arvin E. 1991. Biodegradation kinetics of chlorinated aliphatic hydrocarbons with methane oxidizing bacteria in an aerobic fixed biofilm reactor. Water Res WATRAG 25(7) 873-881. 

Here [g m" -h ] is the maximum mass flux through biofilm surface. The physical model used by these authors was the same as that proposed by Atkinson, extended to double S limitation (glucose and O2). Their authors case A corresponds to no S or O2 limitation, case B involves an inactive aerobic film (S limitation), and case C involves O2 limitation (partly anaerobic film). With a modified Thiele modulus and a pseudo-first-order approximation for the enzyme-catalyzed rate under the given surface conditions, Fig. 4.40 shows the result of the calculation of versus (/>j as a function of Sj /K under various conditions. For biofilm reactor operation, is more convenient in the form... 

Hasar, H., Xia, S., Ahn, C. H. and Rittmann, B. E. 2008. Simultaneous removal of organic matter and nitrogen compounds by an aerobic/anoxic membrane biofilm reactor. Water Research, 42,4109 116. 

Modin, O., Fukushi, K., Nakajima, F. and Yamamoto, K. 2008b. A membrane biofilm reactor achieves aerobic methane oxidation coupled to denitrification (AME-D) with high efficiency. Water Science and Technology, 58,83-87. 

Massol-Deya AA, Whallon J, Hickey RF, Tiedje JM (1995) Channd structure in aerobic biofilms of fixed-film reactors treating contaminated ground ter. Appl Environ Microbiol 61(2) 769—777... 

Tijhuis L, van Loosdrecht MCM, Heijnen JJ (1994b) Formation and growth of heterotrophic aerobic biofilms on small suspended particles in airlift reactors. Biotechnol Bioeng 44 595-608... 

Ryhiner, G., Petrozzi, S., and Dunn, I. J., Operation of a Three-Phase Biofilm Fluidized Sand Bed Reactor for Aerobic Wastewater Treatment, ... 

Fig. 6 Acid orange 7 and phenol concentration in the internal loop airlift reactor operated with Pseudomonas sp. 0X1 biofilm on natural pumice. (A) Aerobic phase. Gas air. Liquid continuous feeding of phenol supplemented synthetic medium. (AN) Anaerobic phase. Gas nitrogen. Liquid batch conditions, dye supplemented medium...

As stated earlier, the biodegradation of azo dyes requires an anaerobic and aerobic phase for the complete mineralization. The required condition can be implemented either by spatial separation of the two sludge using a sequential anaerobic-aerobic reactor system or in one reactor in the so-called integrated anaerobic-aerobic reactor system. In recent years, combined anaerobic-aerobic treatment technologies are extensively applied in the treatment of azo dye-containing wastewaters. Table 1 lists the systems based on combined anaerobic-aerobic treatment in separate reactors. Table 2 lists SBR based on temporal separation of the anaerobic and the aerobic phase. Table 3 lists the other systems, either hybrids with aerated zones or micro-aerobic systems based on the principle of limited oxygen diffuse in microbial biofilms [91]. 

Liquid-fluidized beds predate gas-fluidized beds, but they have considerably fewer applications because of a smaller number of advantages. Most applications are physical, with bioreactors being the sole significant reactor application. Much of the recent attention has focused on aerobic wastewater treatment and fermentation processes, e.g., with methane as the organic substrate (see Refs. " for more details). In these processes, microbial cells are attached to the surface of inert particles (e.g., sand or activated carbon) as a biofilm, or trapped within the pores or interior of particles, causing the particle size and/or density to vary with time. Loaded particles therefore have... 

The other biofilm systems such as the rotating biological contactor (RBC) and the aerobic upflow sludge bed reactor (AUSB) shown in Fig. 2 could possibly be applied for MTBE removal, and may posses some unique advantages. However, to our knowledge these reactors have never been appHed for MTBE removal so far. 

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