Aeration

Comparison of mineral acid pretreatments for sulfide removal

“…Less information is available about the removal of H 2 S. An excellent overview of the equilibrium and gas transfer of H 2 S is available 7 . In water and wastewater treatment, adjustment of pH has been shown to be best accomplished using mineral acid addition 8 – 11 . H 2 SO 4 is commonly used because of its effectiveness, availability, and relatively low cost.…”

Aeration of Water

“…The percentage change in gas saturation deficit (S -Ct) or surplus (C t -S) for any given time period The two tiers of trays are supplied from a central riser pipe. The illustration is taken from a paper by R. L. Brown (12).…”

“…The work of Brown (12) at Memphis demonstrated that good ventilation is necessary for the effective removal of gases from solution. His conclusion, based on data from pilot and full-scale plant operations, was that the media in multiple-tray aerators should be so arranged that fresh air continuously passes through the falling water and over the media.…”

Hydrogen Sulfide Problems of Small Water Systems

“…Operators confirm this observation. Flentje (9) states that aeration by the diffusion of compressed air has unusual opportunities for application in water treatment because it can so easily and quickly be tried out and adopted. He reports that the amount of air required is 0.005-0.16 cu ft per gallon of water and that a short deten-Feb. 1954 SULFIDE PROBLEMS 169 tion period, usually approximately 15 min, is recommended.…”