Removal of ammonia nitrogen from sewage by immobilization nitrification bacteria
MetadataShow full item record
The immobilized microbial beads were prepared to treat ammonia-nitrogen in domestic sewage, which is made from entrapping nitrobacteria with the polyvinyl alcohol-sodium alginate as entrapment carriers. In order to study the removal rate of ammonia-nitrogen, some factors such as the amount of bacteria of immobilized imbedded carrier, the proportion between carrier and wastewater, activation time, temperature, DO and the recycling times of immobilized imbedded carrier were investigated by the parallel test. The result indicated that the removal rates of ammonia-nitrogen and COD using the immobilized nitrobacteria were higher than that of the traditional active sludge obviously, and it also showed that the optimum conditions were as follows: the embedding carrier activation time of 20 h, the temperature of 25? and the DO of 3~4 mg/L. Furthermore, we found that the removal rate of ammonia nitrogen and COD using immobilized nitrobacteria was superior to the conventional activated sludge process. The removal rate of ammonia nitrogen was about 20% with 20% immobilization embedding carriers, when the amount of nitrification bacteria to immobilized imbedded carrier was less than 1:2.5, the removal rate of ammonia nitrogen was above 90.12%, in addition, the removal of ammonia nitrogen with immobilization embedding carriers was expressed as the first order kinetic reaction model.
Showing items related by title, author, creator and subject.
Jia, Huanfei (2002)This thesis investigates an application of immobilized lipase for pre-treating wastewater containing fats and oils, which is difficult to treat practically. The kinetics of soluble lipase was studied for establishing ...
Le Van, Khoi (2012)Intensive marine aquaculture may cause negative impacts on the aquatic environment by causing water pollution, algae bloom and reduction in biodiversity of the surrounding aquatic environment. The nutrient-rich effluents ...
Size exclusion chromatography as a tool for natural organic matter characterisation in drinking water treatmentAllpike, Bradley (2008)Natural organic matter (NOM), ubiquitous in natural water sources, is generated by biogeochemical processes in both the water body and in the surrounding watershed, as well as from the contribution of organic compounds ...