[Simultaneous removal of nitrate and 4-chlorophenol from contaminated water using solid-phase denitrification process].
A novel biodenitrification process, termed as "solid-phase denitrification", was used to remove nitrate and 4-chlorophenol (4-CP) from water. The experimental results indicate that nitrate can be effectively removed using biodegradable meal box (BMB) as carbon source and biofilm carrier of denitrifying microorganisms. Volumetric denitrification rate was 24.0 mg/(L x h) with the 50 mg/L of initial NO3(-)-N concentration under the batch experiments. Denitrification was facilitated with 4-CP concentration which was less than 30 mg/L, and was repressed with over 40 mg/L of 4-CP. When the initial concentration of 4-CP was 5 mg/L and 30 mg/L, the removal efficiency of 4-CP was 90% and 71% within 8 h under denitrifying condition, respectively. 4-CP removal was due to both the absorption onto BMB and degradation by microorganisms attached to BMB.
Wang
Xu-Ming
XM
Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China. xmwang@mail.tsinghua.edu.cn
Wang
Jian-Long
JL
D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology*; D002244:Carbon / Q000378:metabolism; D002733:Chlorophenols / Q000302:isolation & purification* / Q000378:metabolism; D009566:Nitrates / Q000302:isolation & purification* / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D014881:Water Supply / Q000032:analysis
D002733:Chlorophenols; D009566:Nitrates; D014874:Water Pollutants, Chemical; C029107:4-chlorophenol; D002244:Carbon