Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
Patent
1988-07-05
1989-09-26
Cintins, Ivars
Liquid purification or separation
Recirculation
Serially connected distinct treating or storage units
210251, 210266, 435299, C02F 1104
Patent
active
048698199
ABSTRACT:
An improved process for the biomethanation of an organic substrate includes treating the substrate in a first reactor to form organic acid anions, passing an aqueous preparation containing dissolved organic anions through an ion exchanger so that the organic acid anions are adsorbed and separated from the remainder of the aqueous preparation, desorbing; the organic acid anions and passing the desorbed acids to a second reactor containing methanogenic bacteria which convert the acids to methane. In a preferred embodiment, a bicarbonate solution is produced in the second reactor and it is used to desorb the organic acid anions and regenerate the anion exchanger into the bicarbonate form. A preferred apparatus first and second reactors, and a pair of anion exchangers connected by tubing to both reactors also is disclosed.
REFERENCES:
patent: 3833710 (1974-09-01), Deschamps et al.
patent: 4696746 (1987-09-01), Ghosh et al.
E. J. Nyns, "Success or Failure of Biogas Plants in Europe. The Paradox of a Mature Technology," Nov. 11-15, 1985, pp. 15-29.
Frederick G. Pohland, "Biogas Developments in North America," Nov. 11-15, 1985, pp. 41-81.
Gatze Lettinga et al., "Anaerobic Wastewater Treatment Based on Biomass Retention with Emphasis on the UASB-Process," Nov. 11-15, 1985, pp. 279-301.
L. van den Berg, et al., "The Downflow Fixed Film and Upflow Blanket Filter Reactor," Nov. 11-15, 1985, pp. 303-325.
Thiele Jurgen
Zeikus Joseph G.
Cintins Ivars
Michigan Biotechnology Institute
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