Analysis of nitrification processes in constructed wetlands for residential wastewater treatment

Conference · Thu Jul 01 04:00:00 EDT 1999

OSTI ID:20014758

Leonard, K M; Maghsoudlou, N

This paper documents a study into nitrification processes at residential constructed wetland treatment systems. This study was initiated to determine the factors affecting ammonia reduction and find mechanisms for promoting nitrification. Sampling and analysis of operational data from five wetland treatment systems was performed to quantify expected ammonia and nitrate values. A statistical revealed that the expected value of effluent ammonia and nitrate concentrations were 25 mg/L and 1.0 mg/L, respectively. The initial analyses revealed an occasional problem with high effluent ammonia values in the CWs. Since low temperatures may be a factor in lack of ammonia reduction, a simple relationship was made between temperature and reductions to determine dependence. Mathematical analyses were also conducted to study the kinetics of ammonia reduction. Several nitrification enhancements were implemented at one of the sites, including hydrogen peroxide addition (as an oxygen donor) and the addition of nitrifying bacterial culture. The relationships and kinetics information obtained from this study will be used by the state health department for developing design guidelines and proposing nitrification enhancements.

• Research Organization: Univ. of Alabama, Huntsville, AL (US)
• OSTI ID: 20014758
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
AMMONIA
MUNICIPAL WASTES
NITRIFICATION
REDUCTION
WATER TREATMENT
WETLANDS