Continuous treatment of textile wastewater by photo-dependent denitrifying sludge (PDDS) fixed on PVA gel beads.
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概要
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For efficient treatment of textile wastewater, continuous treatment using PVA gel beads was conducted. The photo-dependent denitrifying sludge (PDDS) consisting of a symbiotic consortium of denitrifying and dye-degrading photosynthetic bacteria attached on polyviniyl alcohol (PVA) gel beads. The results of batch experiments indicated that immobilized PDDS has denitrification and decolorization capability under illuminated and anoxic conditions. A continuous-flow system consisting of nitrification and denitrification processes was constructed, and treatment experiments using a synthetic textile wastewater were conducted. The specific nitrification rate was influenced by inorganic carbon concentration and the relation of specific nitrification rate to organic nitrogen concentration followed Michaelis-Menten kinetics. The PDDS attached immobilized on PVA gel beads successfully removed color intensity and NOx-N in the denitrification reactor.
- 日本水処理生物学会の論文
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