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Cascade Air Stripping: Techno‐Economic Evaluation of a New Ground Water Treatment Process
Author(s) -
Nirmalakhandan N.,
Peace G.L.,
Shanbhag A.R.,
Speece R.E.
Publication year - 1992
Publication title -
groundwater monitoring and remediation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 47
eISSN - 1745-6592
pISSN - 1069-3629
DOI - 10.1111/j.1745-6592.1992.tb00039.x
Subject(s) - air stripping , stripping (fiber) , cascade , environmental science , activated carbon , adsorption , contamination , volatility (finance) , environmental engineering , waste management , process engineering , water treatment , chemistry , materials science , engineering , chromatography , mathematics , ecology , organic chemistry , wastewater , biology , composite material , econometrics
A simple modification of the conventional air‐stripping process introduced as cascade air stripping is proposed for efficient and economical removal of semivolatile and low volatility contaminants from ground water. The technical feasibility and economic viability of this process are evaluated using field test results and cost model simulations. The field tests enabled the process model to be verified at various water flow rates ranging from 150 gpm to 400 gpm. The field study also demonstrated the feasibility of the proposed system at a near full‐scale level. Cost models were used to compare the proposed process to conventional air stripping and granular‐activated carbon adsorption in removing a range of contaminants. This analysis showed that the treatment cost (ø/1000 gal) of cascade air stripping is about 15 percent lower than conventional air stripping and about 40 percent lower than granular‐activated carbon adsorption.