Abstract
Abstract Immobilized microcystis aeruginosa was applied in purifying different concentration of livestock wastewater, of which removal ability to NH4+-N, TP and CODCr was investigated in this study. Sodium alginate (SA) and polyvinyl alcohol (PVA) were chosen as different entrapment agents. The results showed that with SA embedded in microcystis aeruginosa, the removal rate of NH4+-N, TP and CODCr to high-concentration wastewater reached 90.77%, 76.10%, 70.13% separately. While the removal efficiency went down along with low-concentration wastewater, which was 82.37% NH4+-N, 67.59% TP, 67.45% CODCr. PVA entrapped microcystis aeruginosa was inferior to SA, reaching removal of up to 77.41% NH4+-N, 69.02% TP, 55.07% CODCr for high-concentration wastewater. Treating low-concentration wastewater with PVA showed worst efficiency among the above agents. This study showed immobilization of microcystis aeruginosa in SA gel beads was more potential to serve as a treatment method for livestock wastewater.
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