Disinfection/ammonia removal from aquaculture wastewater and disinfection of irrigation water using electrochemical flow cells: A case study in Hawaii.

This field case study reports findings on disinfection/ammonia removal from aquaculture wastewater and disinfection of irrigation water carried out at an aquaculture farm and two irrigation locations in Hawaii. We used a flow cell incorporating PtRu/graphite anode and graphite cathode for the disinfection/ammonia removal from aquaculture wastewater, and a flow cell assembled with graphite plates as both anode and cathode for the disinfection of irrigation water. The removal of ammonia followed the indirect oxidation mechanism mediated by free chlorine electro-generated at the PtRu/graphite anode.

Electrochemical disinfection of irrigation water with a graphite electrode flow cell.

In this work, we report experimental studies on the disinfection of irrigation water using a flow cell assembled with low-cost graphite plates as both anode and cathode. Natural irrigation waters collected from two irrigation locations (Reservoir 225 and Bott Well Pond) in Hawaii were used, and synthetic irrigation waters were prepared based on the chemical analysis of natural irrigation waters. The concentration of chloride was 10.

Recent Advances and Challenges of Electrocatalytic N Reduction to Ammonia.

Global ammonia production reached 175 million metric tons in 2016, 90% of which is produced from high purity N and H gases at high temperatures and pressures via the Haber-Bosch process. Reliance on natural gas for H production results in large energy consumption and CO emissions. Concerns of human-induced climate change are spurring an international scientific effort to explore new approaches to ammonia production and reduce its carbon footprint.

[Preparation and property study of the recombinant Camel anti-SpaA-N single domain antibodies].

Aim: In order to obtain single domain antibody against surface protective antigen A (SpaA)of Erysipelothrix rhusiopathiae.

Methods: The SpaA-N recombinant protein was used to screen binders from Bactrian camel VHH phage display library. After sequencing, the interested VHH gene fragments were subcloned into pET-30a vector to overexpress the protein in E.