Highly efficient aerobic phosphorus-removing bacteria capable of synthesizing nanoparticles by microbial self-assembly using waste water

Patent metadata

Field	Value
Publication number	US-2021317023-A1
Application number	US-202117179449-A
Country	US
Kind code	A1
Filing date	Feb 19, 2021
Priority date	Apr 14, 2016
Publication date	Oct 14, 2021
Grant date	—

Abstract

The present application discloses a class of aerobic efficient-phosphorus-removal bacteria that enable to biologically self-assemble and synthesize nanoparticles while wastewater treatment, including Shewanella sp. CF8-6, Psychrobacter aquimaris X3-1403, and Erythrobacter citreus X3-1411. The strains in the present application have a high adaptability, which may grow, remove nutrients including phosphorus and synthesize nanoparticles within a broad range of pH values, salinity, temperatures, and nutrition concentrations of wastewater. Particularly, the outstanding performance of phosphorous removal at high-salinity has a high significance in wastewater treatment from seawater utilization such as seawater toilet-flushing to solve the fresh water resource deficiency. Self-flocculation and self-assembly are the important properties of the strains to form biofilms and synthesize calcium phosphate nanoparticles at low-concentrations, while decomposing contaminants in the wastewater. The application provides an environmental-friendly nanoparticle synthesis method with low-cost and without chemical additives, which realizes the efficient treatment of wastewater and high value phosphorous resources recovery.

First claim

1 - 7 . (canceled)

8 . A process of removing phosphorous from saline wastewater, comprising the steps of:
inoculating a microbial strain into a to-be-treated wastewater, wherein the microbial strain comprises at least one strain selected from the group consisting of: Shewanella sp. CF8-6, Psychrobacter aquimaris X3-1403, and Erythrobacter citreus X3-1411, wherein; the Shewanella sp. CF8-6 was collected in China Center for Type Culture Collection on Mar. 29, 2016 at Luojiashan, Wuchang, Wuhan City, with a collection number of CCTCC M 2016154, the Psychrobacter aquimaris X3-1403 was collected in China Center for Type Culture Collection on Mar. 29, 2016 at Luojiashan, Wuchang, Wuhan City, with a collection number of CCTCC M 2016155, and the Erythrobacter citreus X3-1411 was collected in China Center for Type Culture Collection on Mar. 29, 2016 at Luojiashan, Wuchang, Wuhan City, with a collection number of CCTCC M 2016156.

9 - 17 . (canceled)

18 . The process of claim 8 , further comprising: culturing the microbial strain in an LB culture medium at about 0-15% salinity to prepare an activated bacteria solution, and adding the activated bacteria solution to the to-be-treated wastewater.

19 . The process of claim 8 , wherein the microbial strain is an aerobic efficient-phosphorus-removal bacteria that can, using wastewater, biologically self-assemble into nanoparticles.

20 . The process of claim 8 , wherein the microbial strain is added to the wastewater at a concentration of about 8 to 12% volume.

21 . The process of claim 8 , wherein the microbial strain is added to the wastewater at a concentration of about 5 to 20 mg/L.

22 . The process of claim 18 , wherein the LB medium comprises 1% peptone, 0.3% yeast mixed with artificial seawater (0-15% dissolved salts).

23 . The process of claim 18 , wherein the microbial strain is cultured for 18 to 30 hours to prepare the activated bacteria solution.

24 . The process of claim 18 , wherein the microbial strain is cultured for a time sufficient to synthesize nanoparticles by microbial self-assembly.

25 . The process of claim 8 , wherein the microbial strain further comprises a solid or liquid carrier.

26 . The process of claim 8 , wherein the microbial strain is selected from a cultured living cell, a fermentation broth of the living cell, a filtrate of a cell culture, or a mixture of cell and filtrate.

27 . The process of claim 8 , wherein the microbial strain is added to the wastewater as a liquor, suspension concentrate, powder, granule, wettable powder, or water dispersible granule.

28 . The process of claim 8 , wherein the microbial strain is inoculated into the wastewater at a concentration sufficient to remove phosporous from the wastewater.

29 . The process of claim 8 , further comprising culturing the microbial strain in the wastewater for a time sufficient to remove phosphorous from the wastewater.

Assignees

• Univ Shandong

Inventors

• Zhou Weizhi
• Jiang Li
• Huang Zhaosong
• Wang Yanru
• Zhao Haixia

Classifications

• C02F3/308

  Biological phosphorus removal · CPC title

• C12R2001/01

  Bacteria or Actinomycetales {; using bacteria or Actinomycetales} · CPC title

• C12N1/205

  Bacterial isolates · CPC title

• C12P3/00

  Preparation of elements or inorganic compounds except carbon dioxide {(recovery of carbon dioxides as by-products C12F3/02)} · CPC title

• C02F3/341 Primary

  Consortia of bacteria · CPC title