公开(公告)号：US20240351928A1

公开(公告)日：2024-10-24

申请号：US18637984

申请日：2024-04-17

Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK

Inventor： Julian John Alexander VAN DER MADE ,  Kartik CHANDRAN ,  Elizabetth Amy LANDIS ,  Ruby LAI

IPC: C02F3/34 ,  C02F1/467 ,  C02F1/72 ,  C02F101/34 ,  C02F101/36 ,  C02F103/34 ,  C12M1/00 ,  C12M1/06 ,  C12M1/12 ,  C12M1/42 ,  C12N1/14

CPC classification number: C02F3/347 ,  C02F1/4672 ,  C02F1/722 ,  C12M25/02 ,  C12M27/06 ,  C12M29/06 ,  C12M35/02 ,  C12N1/14 ,  C02F2101/34 ,  C02F2101/36 ,  C02F2103/34 ,  C02F2305/026

Abstract: A fungal culture is provided that incorporates concentrations of Fenton reactants and white rot fungi biomass. These components synergize to degrade recalcitrant organic compounds such as lignins, perfluorochemicals including PFOA, plastics, and related compounds, particularly with 1.5 mM H2O2, 1 mM Fe2+, and Phanerochaete chrysosporium exhibiting lignin degrading capabilities comparable to cultures of Fenton-only reaction mediums with significantly higher concentrations of hydrogen peroxide. Both the fungi and the Fenton reactants work to degrade the organic compounds. Additionally, the Fenton reactants impose oxidative stress on fast-growing microbial competitors such as E. coli, selectively inhibiting the competing bacteria and their disadvantageous effects on white rot fungi activity. The white rot fungi recycle Fe(II) ions to reduce Fenton reactant input burden. An electro-Fenton reaction process can further reduce this burden by replenishing H2O2. The resulting systems and methods demonstrate more economical and sustainable treatment of recalcitrant organic compounds.

公开(公告)号：US20190202723A1

公开(公告)日：2019-07-04

申请号：US16311892

申请日：2017-06-22

Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK

Inventor： Kartik CHANDRAN ,  Luke PLANTE

IPC: C02F3/30 ,  C02F1/66 ,  C02F3/00 ,  C02F3/34

CPC classification number: C02F3/305 ,  C02F1/66 ,  C02F3/006 ,  C02F3/307 ,  C02F3/341 ,  C02F2209/005 ,  C02F2209/06 ,  C02F2209/08 ,  C02F2209/16

Abstract: Methods and systems for controlling a denitrification reaction in a biological nitrogen removal reactor including denitrifying bacteria to favor denitratation of nitrate to nitrite and limit denitritation of nitrite to nitrogen gas are disclosed. pH, dissolved oxygen levels, solids retention time, and chemical oxygen demand to nitrogen ratio are controlled to favor this reaction. Wastewater or contaminated groundwater including concentrations of ammonium and nitrate are continuously fed to the biological nitrogen removal reactor along with a source of carbon and electrons as an influent, which is treated to form a nitrite effluent. The nitrite effluent may then be fed to an anammox reactor including anammox bacteria for production of nitrogen gas. The system may be operated under substantially anoxic conditions, which provides significant cost savings without sacrificing efficiency or productivity compared to traditional wastewater treatment systems and processes.