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1. (WO2018140742) SELECTIVE GAS EXTRACTION TO MANAGE TOXICITY AND PH IN ANAEROBIC ENVIRONMENTS

Pub. No.:    WO/2018/140742    International Application No.:    PCT/US2018/015470
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Sat Jan 27 00:59:59 CET 2018
IPC: C12M 1/107
C12M 1/00
C12M 1/34
Applicants: PURPOSEENERGY, INC.
Inventors: FITCH, Eric
KSHETRY, Hersh
O'KEEFE, David
Title: SELECTIVE GAS EXTRACTION TO MANAGE TOXICITY AND PH IN ANAEROBIC ENVIRONMENTS
Abstract:
A method of controlling a concentration of constituents in a bioreactor includes providing a bioreactor containing materials including constituents. The materials comprise a liquid digestate and a biogas within an enclosed headspace above the liquid digestate formed at least in part by movement of the constituents in the liquid digestate into the enclosed headspace. The method further includes recirculating the materials. Recirculating first includes removing a portion of the materials from the bioreactor. Next, constituents are selectively removed from the removed portion of the materials in an amount designed to maintain the constituents in the liquid digestate below a threshold level. Finally, the removed portion of the materials are reintroduced into the bioreactor such that the constituents in the liquid digestate are maintained below the threshold level.