Aeration recirculation in air and high purity oxygen systems for control of VOC emissions from wastewater aeration basins
- Univ. of Cincinnati, OH (United States). Dept. of Civil and Environmental Engineering
- Metropolitan Sewer District of Greater Cincinnati, OH (United States)
A steady state circulating aeration system (CAS) model has been used to study the effects of volatility and degradability on the fate of VOCs in both air and high purity oxygen (HPO) systems. With an increase of the circulating ratio in an air CAS, air emissions by stripping can be significantly reduced for compounds of low degradability and high volatility. Enhancement of biodegradation is more significant for compounds of high degradability and volatility. A large portion of VOCs will remain in the wastewater when the circulation ratio is high, especially for VOCs that are difficult to degrade. In HPO systems, emissions by stripping are much less than in air systems. However, VOCs will remain in the wastewater if they have poor degradability. Volatility of VOCs is not important in HPP systems. Due to their wide range and large uncertainties, degradation rate constants are a major factor determining the effectiveness of a CAS for VOC emission control.
- OSTI ID:
- 6170158
- Journal Information:
- Environmental Progress, Journal Name: Environmental Progress Vol. 18:2; ISSN 0278-4491; ISSN ENVPDI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AERATION
AIR POLLUTION ABATEMENT
BIODEGRADATION
CHEMICAL REACTIONS
CIRCULATING SYSTEMS
DECOMPOSITION
EMISSION
HYDROGEN COMPOUNDS
LIQUID WASTES
MATTER
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION ABATEMENT
VOLATILE MATTER
WASTE WATER
WASTES
WATER