Contribution of methanogenesis to denitrification with an upflow filter

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Research Journal of the Water Pollution Control Federation; (United States)

OSTI ID:6030688

Hanaki, K; Polprasert, C

A laboratory-scale upflow filter was fed with synthetic wastewater containing nitrate and methanol to examine the contribution of methanogenesis to denitrification. Complete (99.8%) nitrate removal occurred at a methanol: NO{sub 3}-N (M:N) ratio {ge} 2.30 and at a hydraulic retention time (HRT) longer than 1.5 hours. The surplus methanol after the denitrification was converted to methane with low effluent chemical oxygen demand (COD) at M:N {ge} 2.65. Effluent nitrate level depended on HRT; effluent COD depended on influent methanol. Material balance revealed that 75% of methanol involved in denitrification was oxidized by nitrate or nitrate and the methane conversion fraction from methanol was 56%.

• OSTI ID: 6030688
• Journal Information: Research Journal of the Water Pollution Control Federation; (United States), Journal Name: Research Journal of the Water Pollution Control Federation; (United States) Vol. 61:9; ISSN 1047-7624; ISSN RJWFE
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ALCOHOLS
ALKANES
BACTERIA
BENCH-SCALE EXPERIMENTS
BIODEGRADATION
BIOSYNTHESIS
CHEMICAL REACTIONS
DECOMPOSITION
DENITRIFICATION
FILTERS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
LIQUID WASTES
LOADING RATE
METHANE
METHANOGENIC BACTERIA
METHANOL
MICROORGANISMS
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SYNTHESIS
WASTE WATER
WASTES
WATER