Chemical Oxygen Demand Reduction using Lactic-acid Forming Bacteria to Treat River Mouth Sediment

Abstract

Six kinds of lactic-acid forming bacteria were isolated from an environmental preservation material (Ehime AI) and fermented and matured sediment mud from Osaka Bay. Among these isolated bacteria, strain Ob from Osaka Bay showed the highest COD removal of sediment mud (30.4% reduction) after 4 weeks. Strain Aa from Ehime AI showed 13.8% COD removal as the highest active strain of lactic acid formation. High lactic-acid forming ability of bacteria was not correlated to high COD reduction. Strain Ob was identified as Paenibacillus motobuensis using genetic analysis.

Practical Removal of Radioactivity from Soil in Fukushima Using Immobilized Photosynthetic Bacteria Combined with Anaerobic Digestion and Lactic Acid Fermentation as Pre-Treatment

“…18) Sterilized BCP liquid medium (1 L; glucose 1.0, yeast extract 2.5, peptone 5.0, polysorbate 80 1.0, L-cysteine 0.1, and bromocresol purple 0.06 g/L) was prepared in a 2-L conical flask. Lactic acid bacteria, Lactobacillus casei, isolated from a commercial environmental preservation materials (named Ehime AI), 23) was inoculated into the BCP liquid medium.…”

“…16) The cultivation and immobilization procedures for SSI, with approximately 2-cm alginate beads, are described in a previous paper. 17,18) The beads were packed into a mesh bag (1:0 Â 1:0 mesh, 15 cm in diameter, 30 cm long), as described previously. One mesh bag contained about 210 beads and 10.0 mg of SSI cells (dry base).…”