FENG Ben-xiu, LAI Zi-ni, CHEN Jun-bin, et al. Study on Removing Ammonium Nitrogen from Wastewater by Immobilized Microorganism[J]. 2006, 23(2): 29-33.DOI:
A technics used to efficiently remove NH+4-N in the water treatment is studied with the carrier of PVA entrapping nitrobacteria in this paper.It is reported that 1% sodium alginate
4% SiO2
0.3% CaCO3 are the good additives for PVA beads immobilized nitrifying bacteria by PVA crosslinked with boric acid.The beads have well mechanical intensity and diffusion characteristics.At the same time the NH+4-N removal efficiency is very high with these beads which are made under the conditions of 10% PVA
2% active carbon
32?h crosslinked time and 1 vol.nitrifying bacteria in 2 vol.gelatin.The NH+4-N removal efficiency could reach 80% or more in 42?h.The effect is remarkable.