La. Admin. Code tit. 51 § XII-191
Current through Register Vol. 50, No. 11, November 20, 2024
Section XII-191 - Taste and Odor ControlA. Powdered Activated Carbon. Design elements for powdered activated carbon (PAC) include the following. 1. Continuous agitation or resuspension equipment shall be provided to keep the carbon from depositing in the slurry storage tank.2. Provision shall be made for adequate dust control.3. The required rate of feed of carbon in a water treatment plant depends upon the tastes and/or odors involved, but provision should be made for adding from 0.1 milligrams per liter to at least 40 milligrams per liter.4. Powdered activated carbon shall be handled as a potentially combustible material.B. Granular Activated Carbon. Replacement of anthracite with granular activated carbon (GAC) may be considered as a control measure for geosmin and methyl isoborneol (MIB) taste and odors from algae blooms. Demonstration studies may be required by the state health officer. See §177. A.6 iv of this Part for application within filters.C. Copper Sulfate and Other Copper Compounds. Continuous or periodic treatment of water with copper compounds to kill algae or other growths shall be controlled to prevent copper in excess of 1.0 milligrams per liter as copper in the plant effluent or distribution system. Care shall be taken to assure an even distribution of the chemical within the treatment area.D. For aeration, see §185 of this Part.E. Ozone. Ozonation can be used as a means of taste and odor control. Adequate contact time shall be provided to complete the chemical reactions involved. Ozone is generally more desirable for treating water with high threshold odors. (See §179. H of this Part)La. Admin. Code tit. 51, § XII-191
Promulgated by the Department of Health, Office of Public Health, LR 44327 (2/1/2018), effective 8/1/2018.AUTHORITY NOTE: Promulgated in accordance with the provisions of R.S. 40:4.A.(8), 40:4.13.D.(1)(2) and 40:5.A.(2)(3)(5)(6)(7)(17).