Formate catalysis from hypersaline environments by a halotolerant halomonas sp.

Patent metadata

Field	Value
Publication number	US-2019218126-A1
Application number	US-201716327608-A
Country	US
Kind code	A1
Filing date	Aug 24, 2017
Priority date	Aug 25, 2016
Publication date	Jul 18, 2019
Grant date	—

Abstract

The present invention relates to a method for reducing the formate content of hypersaline wastewater with cells of the Halomonas sp. strain MA-C. The present invention further concerns a method for the production of chlorine and/or sodium hydroxide. Further en-compassed by the present invention is a composition comprising hypersaline wastewater and cells of the Halomonas sp. strain MA-C.

First claim

1 .- 15 . (canceled)

16 . A method for reducing the formate content of hypersaline wastewater, said method comprising
(i) providing a composition A comprising hypersaline wastewater and formate, and (ii) mixing said composition A with cells of the Halomonas sp. strain MA-C, thereby generating a composition B comprising the hypersaline wastewater and the Halomonas sp. strain MA-C, wherein composition A comprises NaCl in a concentration of more than 10% (w/v), based on the total volume of composition A.

17 . The method of claim 16 , wherein composition A comprises NaCl in a concentration of more than 12.5% (w/v), based on the total volume of composition A, or wherein composition A comprises NaCl in a concentration of more than 15% (w/v), based on the total volume of composition A.

18 . The method of claim 16 , wherein composition A consists of hypersaline wastewater.

19 . The method of claim 16 , wherein composition A comprises formate in an amount of more than 50 mg/l.

20 . The method of claim 16 , wherein the reduction of the formate content is carried out at temperature of 15° C. to 45° C.

21 . The method of claim 16 , wherein step (i) comprises isolating the hypersaline wastewater from methylene diamine production.

22 . The method of claim 16 , wherein the composition B comprises NaCl in a concentration of more than 10% (w/v), or wherein the composition B comprises NaCl in a concentration of more than 15% (w/v).

23 . The method of claim 16 , wherein composition B further comprises at least one substrate selected from the group consisting of acetate, glucose, sucrose, lactate, malate, succinate, citrate, and glycerol, which substrate is added to composition B.

24 . The method of claim 16 , further comprising separating the cells of the Halomonas sp. strain MA-C from the composition B, thereby giving a composition C.

25 . The method of any one of claim 24 , wherein composition C has a TOC content of less than 30 mg/l, and/or wherein composition C comprises formate in an amount of less than 15 mg/l.

26 . The method of claim 24 , further comprising concentrating the composition C, thereby giving a composition C*.

27 . A method for the production of chlorine and/or sodium hydroxide, comprising the steps of
(a) providing a composition C according to the method of claim 24 or a composition C* according to the method of claim 26 , and (b) subjecting the composition according to (a) to a sodium chloride electrolysis process, thereby producing chlorine and sodium hydroxide.

28 . The method of claim 27 , wherein the sodium chloride electrolysis is selected from membrane cell electrolysis of sodium chloride, in particular membrane electrolysis using oxygen consuming electrodes, diaphragm cell electrolysis of sodium chloride and mercury cell electrolysis of sodium chloride.

29 . A composition B of hypersaline wastewater and cells of the Halomonas sp. strain MA-C, wherein said composition comprises NaCl in a concentration of more than 10% (w/v) and formate and/or a bioreactor comprising at least 1 l of said composition.

30 . A method comprising utilizing cells of the Halomonas sp. strain MA-C for reducing the formate content of a composition A comprising hypersaline wastewater, wherein said composition comprises NaCl in a concentration of more than 10% (w/v), based on the total volume of composition A, and formate.

Assignees

• Covestro Deutschland Ag

Inventors

• Heckroth Heike
• Herwig Christoph
• Kamravamanesh Donya
• Ruschitzka Paul

Classifications

• C02F2103/36

  from the manufacture of organic compounds · CPC title

• C25B1/34

  Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis · CPC title

• C02F1/58

  by removing specified dissolved compounds (using ion-exchange C02F1/42; softening water C02F5/00) · CPC title

• C02F2101/34

  containing oxygen · CPC title

• C02F3/34 Primary

  characterised by the microorganisms used · CPC title