Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection - Wisconsin Pollutant Discharge Elimination System
Chapter NR 294 - Soap And Detergent Manufacturing
Section NR 294.02 - Applicability

Universal Citation: WI Admin Code ยง NR 294.02

Current through August 26, 2024

The effluent limitations, standards of performance, pretreatment standards, and other provisions in this chapter are applicable to pollutants or pollutant properties in discharges of process waste resulting from the manufacture of soap and detergent products, intermediate products, and associated processing operations in the following subcategories:

(1) Soap manufacture by the batch kettle process in which neat soap is produced through saponification of animal and vegetable fats and oils by boiling;

(2) Fatty acid manufacture by hydrolysis and subsequent processing to produce a suitable feed material for manufacture of soap by fatty acid neutralization,

(a) Where subsequent processing does not include hydrogenation, and

(b) Where subsequent processing includes hydrogenation;

(3) Soap manufacture by neutralizing refined fatty acids with an alkaline material in approximately stoichiometric amounts;

(4) Glycerine concentration of sweet water from saponification or fat splitting to approximately 60 to 80% crude glycerine content;

(5) Glycerine distillation from crude glycerine to produce finished glycerine of various grades (e.g. UPS);

(6) Manufacture of soap flakes and powders including all operations commencing with drying of the soap to and including packaging of the finished flakes and powders;

(7) Manufacture of bar soaps including all drying, milling, plodding, stamping, and packaging operations associated with conversion of neat soap to finished bar soaps;

(8) Manufacture of liquid soaps including the blending of ingredients and the packaging of the finished products;

(9) Manufacture of sulfonic acid and sulfuric acid esters by means of sulfonation and sulfation of raw materials, including but not limited to petroleum derived alkyls, employing oleum;

(10) Manufacture of sulfonic acid and sulfuric acid esters by means of sulfonation and sulfation employing air and sulfur trioxide;

(11) Sulfonation of organic reactants by the process in which the organic reactant and sulfur trioxide are fed through a mixing nozzle into a vacuum reactor;

(12) Sulfation processes in which sulfamic acid is employed as the sulfating agent;

(13) Sulfation of alcohols, alkylphenols, and alcohol ethoxylates utilizing chlorosulfonic acid as the sulfating agent;

(14) Neutralization of sulfated and sulfonated alkylbenzenes, alcohols, and other materials to convert them to neutral salts;

(15) Manufacture of spray dried detergents, including but not limited to, assembly and storage of raw materials, crutching, spray drying, blending (including tumble spraying of additives), and packaging where there is, with or without fast turnaround operation, as defined in s. NR 294.03,

(a) Normal operation of a spray drying tower, or

(b) Air quality restricted operation of a spray drying tower;

(16) Manufacture of liquid detergents commencing with the blending of ingredients to and including bottling or packaging finished products involving, as defined in s. NR 294.03, either normal liquid detergent operations, or fast turnaround operations;

(17) Manufacture of detergents by dry blending ingredients, including, but not limited to, blending and subsequent packaging;

(18) Manufacture of drum dried detergents including, but not limited to, drying of formulations on heated drums or rollers, conversion of dried detergents to powders or flakes, and the packaging of finished products; and

(19) Manufacture of detergent bars and cakes including, but not limited to, drying, milling, plodding, stamping, and packaging.

Disclaimer: These regulations may not be the most recent version. Wisconsin may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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