title: [Aerobic denitrification of nitrate wastewater and changes of microbial community structure in a bio-ceramic reactor].
abstract: Biological treatment of nitrate wastewater with aerobic denitrifiers in a bio-ceramic reactor was investigated. And denaturing gradient gel electrophoresis (DGGE) method was used for analyzing the stability of microbial community structure. At the condition of the influent with hydraulic loading 0.75 m/h, gas/water ratio 5:1-10:1, temperature 15-23 degrees C, COD loading rate 1.92-5.98 kg/(m3 x d) and NO3- -N loading rate 0.60-1.34 kg/(m3 x d), high nitrate nitrogen removal of almost 100% and the maximum total nitrogen removal of up to 95.73% were achieved during stable operation stage. In addition, the nitrite concentration of effluent was lower. The PCR-DGGE profiles showed that shift of microbial diversity corresponded to the effect of nitrate removal and the preponderant populations for aerobic denitrification were steady during the test period.
authors.affiliation: Department of Municipal Engineering, Wuhan University, Wuhan 430072, China. cwwflybutter@yahoo.com.cn
authors.forename: Hong-yu
authors.initials: HY
authors.lastname: Wang
authors.forename: Fang
authors.initials: F
authors.lastname: Ma
authors.forename: Jun-feng
authors.initials: JF
authors.lastname: Su
authors.forename: Wei
authors.initials: W
authors.lastname: Zuo
authors.forename: Jia
authors.initials: J
authors.lastname: Zhang
authors.forename: Xian-xu
authors.initials: XX
authors.lastname: Zhang
mesh_terms: D001420:Bacteria, Aerobic / Q000145:classification / Q000254:growth & development / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D002516:Ceramics / Q000737:chemistry; D017753:Ecosystem; D009566:Nitrates / Q000302:isolation & purification / Q000378:metabolism*; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism; D010084:Oxidation-Reduction; D011157:Population Dynamics; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods
chemical_list: D009566:Nitrates; D014874:Water Pollutants, Chemical; D009584:Nitrogen