General Electric Company

Bl Technologies, Inc.

Weiqing Xu

Sijing Wang

Jing Lan Chen

Wei Zhang

Scott Martell Boyette

Ying Zhou

Weimin Xiao

Tong Chen

Rong Hong Xu

Jing Luo

Haiwu Zhang

Zhonghong Cheng

Recalcitrant chemical oxygen demand (COD) of a liquid is reduced in a water treatment system. The method includes pretreating the liquid in a pretreatment unit to remove indigenous bacteria or microbes to a population level below which the indigenous organisms can interfere with the screened and externally introduced microorganisms. The liquid is then provided to a reactor that has a filter bed formed with a carrier material. Special microbes are screened and used to colonize the carrier material to remove recalcitrant COD. A biofilm is cultured on the surface of the carrier material to immobilize the screened microbes in the reactor. The method further includes percolating the liquid from the pretreatment unit through the filter bed colonized with the screened microbes to degrade at least part of the recalcitrant COD under aerobic conditions. In one embodiment, the filter is formed with biological granular activated carbon (GAC) as the carrier material and the screened microbes comprise at least one microbial species selected from the group consisting ofand Yeast.

Method of removing recalcitrant organic pollutants

A method for reducing recalcitrant chemical oxygen demand (COD) of a liquid in a water system is provided. The method comprises pretreating the liquid in a pretreatment unit () to remove indigenous bacteria or microbes to a population level below which the indigenous organisms can interfere with the screened and externally introduced microorganisms. The liquid is then provided to a reactor () that has a filter bed () formed with a carrier material (). Special microbes are screened and used to colonize the carrier material () to remove recalcitrant COD. A biofilm is cultured on the surface of the carrier material () to immobilize the screened microbes in the reactor (). The method further comprises adding a co-substrate as the liquid enters the reactor () and percolating the liquid through the filter bed () colonized with the screened microbes to degrade at least part of the recalcitrant COD under aerobic conditions. The screened microbes comprise at least one microbial species selected from the group consisting ofand yeast.

Method of reducing residual recalcitrant organic pollutants

A method of treating a liquid sample having microbiological target species therein to concentrate the species and collect lysate is disclosed. The liquid sample comprises non-target microbiological particles, inorganic particles, and microbiological target species. The liquid is passed through a prefilter medium to allow the target species to pass through as filtrate and retain non-target microbiological products and inorganic particles thereon. The filtrate is contacted with a main filtration medium adapted to retain the target species thereon as retentate. The retentate is lysed to form a lysate containing target material that was enveloped within the microbiological target species. The microbiological species may comprise cell containing or viral material. Target materials comprise intracellular nucleic acids, or in the case of viral sampling, nucleic acids encased within the protein sheath or coating of the virus.

Process for concentrating and processing fluid samples

Growing community of inventors

Shanghai, China

Weiqing Xu