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:Drinking water
Denitrification system:Sulfur limestone autotrophic denitrification (SLAD)
Denitrifying reactor:Combined bioelectrochemical and sulfur autotrophic denitrification system (CBSAD)
Medium:Sulphur granules
Culture taken from:Heterotrophic denitrification system
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Sulphur-limestone
Electron acceptor:Nitrate
Input NO3-N (mg/l):381
Nitrate removal rate (mg NO3-N/l/h):nan
Denitrification rate (gNO3-N removed/m3/day):nan
Microorganisms identified:nan
Molecular tools:nan
Major findings:The CBSAD reactor system could provide a favorable pH environment for denitrification under optimum operation conditions.
Authors:Wang and Qu, 2003
Title:Combined bioelectrochemical and sulfur autotrophic denitrification for drinking water treatment
Pubmed link:None
Full research link:Link
Abstract:A combined bioelectrochemical and sulfur autotrophic denitrification process for drinkingwater treatment was put forward and investigated extensively in this paper. In this new process, the bioelectrochemical denitrification was carried out in the upper part of the reactor while sulfur denitrification in the lower part. The H+ produced in Sulfur Part could be consumed by hydrogen denitrification in Bioelectrochemical Part. Therefore, the limestone for pH adjustment in Sulfur Part was not necessary in this combined process, which avoided the problem of hardness increase. The sulfate accumulation in this combined reactor was less than that of the sulfur limestone autotrophic denitrification system. The effluent from two parts was kept neutral at optimum operation conditions. When the influent nitrate was 30 mg-N/L, the reactor could be operated efficiently at the hydraulic retention time ranged from 1.9 to 5 h (corresponding minimum current was 16–3 mA), i.e. the effluent NO3 -N removal ranged from 90% to 100% without nitrite accumulation and the effluent sulfate concentration was lower than 170 mg/L. The maximum volume-loading rate of the reactor was 0.381 kg NO3 -N/(m3 d). The biomass and scanningelectron microscope micrographs of Sulfur Part were also analyzed.