Energy Recovery from Pretreatment of Industrial Wastes in the Anaerobic Fluidized Bed Process,
DORR-OLIVER INC STAMFORD CONN
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The conclusions derived from the results presented in this paper include the following 1 High strength industrial wastewaters, such as whey permeate, can be effectively treated by the anaerobic fluidized bed process and the energy generated, recovered. COD and BOD5 removals of over 80 can be obtained at volumetric loading rates over 24 kg CODcu m 3 -day 1.5 lb CODsq ft 3 -day. The observed methane production will be approximately 0.3 cu m 3kg COD at STP. 2 Parallel operation of two Anitron System reactors at two different levels of feed concentration revealed that there appears to exist a maximum system hydraulic retention time beyond which microbial solids begin to proliferate in the liquid phase of the system. In the treatment of whey permeate at a volumetric loading rate of 16 kg CODcu m 3 -day, the maximum system HRT corresponds to a maximum system HRT corresponds to a maximum feed COD concentration of approximately 15,000 mg1. 3 Results to date indicate the superior performance of the two-phase operation over the single phase system at a volumetric loading of 10 kg CODm3 -day. Studies are under way to evaluate the two-phase performance at higher loading rates.