Soda waste

the waste material, consisting chiefly of calcium hydroxide and sulphide, which accumulates as a useless residue or side product in the ordinary Leblanc process of soda manufacture; - called also alkali waste.

See also: Soda

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This company disposes of wastes, in limited quantities, through the process of adjusting the pH of the soda waste to meet regulations of the neighboring water treatment plant.
Bellmer and a team of OSU biosystems and agricultural engineering students are working to convert soda waste to ethanol.
The objective of this project is to determine the ease of fermentation of soda waste into ethanol with the specific goal of determining sugar conversion efficiency for popular sodas," said ASABE member Flint Holbrook, biosystems and agricultural engineering sophomore.