Biological Nitrogen Removal Database
A manually curated data resource for microbial nitrogen removal
Biological Nitrogen Removal Database
A manually curated data resource for microbial nitrogen removal
Influent:Disgested sludge municipal anaerobic digestion plant
Anammox system:Simultaneous nitrification and denitrification (SND)
Anammox reactor:Small-scale jar fermentor
Medium:nan
Culture taken from:nan
Microorganism cultured:Alcaligenes faecalis strain No. 4
Respiration:Aerobic
Electron donor:Ammonium sulphate
Electron acceptor:Oxygen, Sodium nitrite, Potassium nitrate
PH:7.3
Ammonia removal rate:2.9 kg-N/m3/day
Nitrate removal rate:nan
Ammonia Removal efficiency (%):0.9
Nitrate Removal efficiency (%):nan
Total Nitrogen Removal (%):0.9
Carbon Source:Trisodium citrate dihydrate
Final products:nan
Major findings:The Alcaligenes faecalis strain No. 4, exhibited high nitrogen removal rates which was more than 200 times higher than in conventional nitrification-denitrification processes. However, this system remained vulnerable to high-strength carbon or nitrogen sources. Although strain No. 4 is not osmophilic, the cells were able to achieve ammonium removal under high saline conditions. As most microorganisms are vulnerable to wastewater with high saline concentrations or highstrength solvents due to the resulting high osmotic pressure, strain No. 4 is able to effectively remove ammonium under such conditions after a certain acclimation period. Thus, this new system can remove highstrength ammonium from marine aquaculture wastewater.
Authors:Shoda and Ishikawa et al., 2014
Title:Heterotrophic nitrification and aerobic denitrification of high-strength ammonium in anaerobically digested sludge by Alcaligenes faecalis strain No. 4
Pubmed link:Link
Full research link:Link
Abstract:Alcaligenes faecalis strain No. 4 which is capable of heterogeneous nitrification and aerobic denitrification, was used to remove high-strength ammonium (approximately 1 g NH4(+)-N/l) from digested sludge, the product of an anaerobic digestion reactor, in which methane was produced from excess municipal sewage sludge. Repeated batch operations were conducted at 20°C and 30°C for 550 h, using a jar fermentor. The removal ratios of high-strength ammonium reached 90-100% within 24 h, and the average ammonium removal rate was 2.9 kg-N/m(3)/day, more than 200 times higher than that in conventional nitrification-denitrification processes. During these operations, the cell density was maintained at 10(8)-10(9) cells of A. faecalis strain No. 4/ml. At 3% NaCl in the digested sludge, strain No. 4 exhibited an ammonium removal rate of 3 kg-N/m(3)/day.