The Simulation Research On Water Treatment Nanchang River Based On The Nitrifying Bacteria And Phosphorus Accumulating Bacteria

With the rapid development of city industrial and aggravating non-point source pollution, river pollution has become a serious problem. Some urban rivers even completely become the dirty rivers, such as Fu River and Yudai River of Nanchang, which is the capital city of Jiangxi province. Therefore, the treatment work of Nanchang water quality is particularly important. Among various kinds of repairing technology, bioremediation technology in situ is widely promoted. Due to the direct investment in water bacteria strains, it is easy to drain the disadvantages in the middle of the river, thereby greatly reducing the processing efficiency of mixed bacteria on water quality of the river, and the immobilized microorganism technology can be a good solution to the problem.Through the water quality monitoring analysis of Fu River and Yudai River of Nanchang, this article selects nitrifying bacteria and phosphorus accumulating bacteria and selects better immobilized carrier to make immobilized pellets on the basis of the optimal proportion. At the same time, this paper also studies the actual treatment of ammonia nitrogen, total phosphorus of simulation wastewater and actual rivers. The results are as follows.(1) 2011 November to 2012 October, the five section of Nanchang City Fuhe River, Yudai River were monitored. Five sections of Fu River and Yudai River of Nanchang are seriously polluted. And ammonia nitrogen and total phosphorus in the water are the most serious.(2) Separation of nitrifying bacteria XH3 in the laboratory has the rate 100% of degradation to nitrite nitrogen. The nitrosobacteria YH3 has the rate 82.75% of degradation to ammonia nitrogen. And phosphorus accumulating bacteria JP2 on the degradation of TP is up to 58.57%,in order to find out the best bacterias in water treatment.(3) By Extraction of DNA, PCR amplification, DNA sequencing, Sequence alignmentand constructing phylogenetic trees of dominant strain XH3, YH3 and JP2, this articlepreliminary clarifies the taxonomic status of three strains.(4) A comparative study of the three strains were isolates of ammonia nitrogen and phosphorus removal efficiency, the strain XH3. The nitrite bacteria and phosphorus accumulating bacteria YH3 JP2 according to the mass ratio of 1:1:1, the degradation of ammonia nitrogen and total phosphorus rate reached 85%, 22.86%.(5) By studying on the treatment effect of the simulated wastewater compared with sodium alginate + powder activated carbon fixation, fixation of PVA+ additive, it found that two kinds of fixation methods have similar treatment effect, making two kinds of immobilized beads immobilized method of degradation of ammonia nitrogen, total phosphorus rate of 24 h can reach 99%. But in the immobilized carrier performance the PVA+ additive, mechanical properties of solids is better. Under the condition of aeration reactor, ammonia nitrogen, degradation effects of total phosphorus can reach 82.7% and 79.27% respectively with immobilized pellets of PVA + additives after 24h’s aeration of Nanchang river.