Method for the anaerobic degradation of organic material

Details Method for the anaerobic degradation of organic material Method for the anaerobic degradation of organic material

1983-07-13

1985-03-19

Castel, Benoit

Liquid purification or separation

Processes

Treatment by living organism

210610, 210617, 48197A, C02F 328

Patent

active

045058199

ABSTRACT:
A system for the anaerobic bacterial degradation of organic material in waste water, comprising introducing the waste water into a contact reactor, pumping the waste water into the bottom of a fluidized bed reactor containing anaerobic bacteria attached to the particles in the bed, the fluidized bed reactor having an effective volume not more than 0.35 times the effective volume of the contact reactor, returning the waste water which has passed through the fluidized bed reactor to the contact reactor and continuously or discontinuously removing treated effluent from the system.
A start-up procedure for the anaerobic treatment system is described comprising culturing anoxic bacteria in the system by adding nitrate ions to the waste water and gradually reducing the amount of nitrate ions in the stream until the population of anoxic bacteria is substantially replaced by a population of anaerobic bacteria. A viable microbial population is established in both the fluidized bed reactor and the contact reactor.

REFERENCES:
patent: 3607736 (1971-09-01), Yusho
patent: 4043936 (1977-08-01), Francis et al.
patent: 4182675 (1980-01-01), Jeris
patent: 4225430 (1980-09-01), Bosman
patent: 4284508 (1981-08-01), Jewell
patent: 4351729 (1982-09-01), Witt
patent: 4352738 (1982-10-01), Blay et al.

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