Engineering extracellular electron transfer to promote simultaneous brewing wastewater treatment and chromium reduction.

Microbial fuel cell (MFC) technology has been developed for wastewater treatment in the anodic chamber, and heavy metal reduction in the cathodic chamber. However, the limited extracellular electron transfer (EET) rate of exoelectrogens remained a constraint for practical applications of MFCs. Here, a MFC system that used the electricity derived from anodic wastewater treatment to drive cathodic Cr reduction was developed, which enabled an energy self-sustained approach to efficiently address Cr contamination.

Enhancement of Acid Protease Activity of Using Atmospheric and Room Temperature Plasma.

Atmospheric and room temperature plasma (ARTP) system is a novel and efficient mutagenesis protocol for microbial breeding. In this study, ARTP was employed to treat spores of strain 3.042 for selection of high acid protease producers.

Comparative analysis of rhamnolipid congener synthesis in neotype Pseudomonas aeruginosa ATCC 10145 and two marine isolates.

A comparative study of rhamnolipid congener synthesis was performed using the neotype Pseudomonas aeruginosa ATCC 10145 and two marine isolates (1A01151 and 1A00364). Compared with the neotype, 1A01151 and 1A00364 showed increased production of rhamnolipids containing higher proportion of congeners with longer fatty acid chains (C-C and C-C) and/or di-rhamnose moiety. These could reduce surface tension of water to lower minimum values of 21.