Aerobic biological treatment

Fig. 11. Aerobic biological treatment, where Sq = initial organic concentration and Xq = initial biomass concentration (—...

The four most common aerobic biological treatment processes are stabilization ponds, aerated lagoons, trickling filters, and activated sludge (see... 

Characteristics and Factors Affecting Aerobic Biological Treatment... 

Tezel, U., Guven, E., Erguder, T.H., and Demirer, G.N., Sequential (anaerobic/aerobic) biological treatment of Dalaman SEKA pulp and paper industry effluent, Waste Manage., 21, 717-724, 2001. 

Tantak NP, Chaudhari S (2006) Degradation of azo dyes by sequential Fenton s oxidation and aerobic biological treatment. J Hazard Mater 136 698-705... 

Colox An aerobic biological treatment system for municipal and industrial wastes. The biomass is fixed as a film on granules in a fixed bed. Developed in Texas by Tetra Technologies. 

Aerobic biological treatment process for domestic or industrial wastewaters. Treated water from this process can often be used as a low cost makeup water source for cooling towers. 

Beltran-Heredia J, Torregrossa J, Garcia J, Dominguez JR, Tiemo JC. Degradation of olive mill wastewater by the combination of Fenton s reagent and ozonation processes with an aerobic biological treatment. Water Sci Technol 2001 44 103-108. 

It should be noted that full treatment of the waste could be accomplished with a retention time of approximately 5 min when only 0.8 U/mL of crude or pure enzyme were used in the presence of PEG. In contrast, an aerobic biological treatment system that was used to treat this particular foundry waste required a retention time of approximately 6 hr. This illustrates one of the most significant advantages of enzymatic treatment. On the other hand, the use of crude enzyme preparations and PEG contributes significant quantities of organic compounds to the waste, which ultimately must be removed in a subsequent treatment step. 

The effluent from edible oil refinery tends to be deficient in nitrogen for aerobic biological treatment. Nitrogen has to be added to fulfill the nutrient requirement. In general, a ratio of BOD N of 100 5 is required for biological treatment. Phosphorus is generally present in adequate amounts in the effluent. This is because phosphoric acid is used in the refining pretreatment process. A ratio of BOD P of 100 1 is adequate for the same purpose. 

Tripathi CS and Allen DG. EeasibiUty study of thermophilic aerobic biological treatment of bleached kraft pulp mill effluent. International Environmental Conference and Exhibition, Vancouver, Canada, April 5-8, 1998, 1189-1201. 

Tripathi CS and AUen DG. Comparison of mesophiUc and thermophilic aerobic biological treatment in sequencing batch reactors treating bleached kraft pulp miU effluent. Wat. Res. 1999 33 836-846. 

Klatt CG and LaPara TM. Aerobic biological treatment of synthetic municipal wastewater in membrane-coupled bioreactors. Biotechnol Bioeng. 2003 82 313-320. 

TWO STAGES ANAEROBIC-AEROBIC BIOLOGICAL TREATMENT OF OUVE OIL WASTE WATER COMBINED WITH MUNICIPAL SEWAGE... 

Kasapgil, B., Anderson, G. K., and Ince, O. (1994). An investigation into the pretreatment of dairy wastewater prior to aerobic biological treatment. Water Sci. Technol. 29, 205-212. 

There are two types of secondary aerobic biological treatment processes suspended growth processes and attached growth processes. In the suspended growth process, the micro-organisms responsible for the biochemical conversion of organic matter are kept in... 

COD testing has several advantages over BOD. Notably the COD test is more rapid, more repeatable, less susceptible to interferences and less labor intensive. On the other hand, BOD is more strongly correlated to processes that actually occur in wastewater treatment systems and receiving waters. For typical textile wastes, the COD BOD ratio is typically about 3 1. Wastewater with higher ratios (e.g. 7 1) are resistant to aerobic biological treatment. (USEPA, 1996). 

Biodegradation of these products has been tested in different environments [90]. Ten months of aerobic biological treatment performed by a high-sensitivity respirometric test, brought to the degradation of more than 90% w/w of a product consisting of 60% of maize starch and... 

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