What role does sodium acetate play in sewage treatment

What role does sodium acetate play in sewage treatment,
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1. Main indicators:
Content: ≥20%, ≥25%, ≥30%
Appearance: clear and transparent liquid, no irritating odor.
Water insoluble matter: ≤0.006%

2. Main purpose:
To treat urban sewage, study the influence of sludge age (SRT) and external carbon source (sodium acetate solution) on the system’s denitrification and phosphorus removal. Sodium acetate is used as a supplementary carbon source to domesticate the denitrification sludge, and then use a buffer solution to control the increase in pH during the denitrification process within the range of 0.5. Denitrifying bacteria can adsorb CH3COONa excessively, so when using CH3COONa as an external carbon source for denitrification, the effluent COD value can also be maintained at a low level. At present, the sewage treatment in all cities and counties needs to add sodium acetate as a carbon source to meet the first-level emission standards.

It mainly plays a role in regulating the PH value of sewage. Sodium acetate is an alkaline chemical substance that can be hydrolyzed to form OH- negative ions in water, which can neutralize acidic ions in water, such as H+ and NH4+. The hydrolysis equation of sodium acetate is CH3COO-+H2O= reversible =CH3COOH+OH-

Extended data

use

1. Determination of lead, zinc, aluminum, iron, cobalt, antimony, nickel and tin. Complex stabilizer. Auxiliary agent of acetylation, buffer, desiccant, mordant.

2, used for the determination of lead, zinc, aluminum, iron, cobalt, antimony, nickel, tin. Used as esterification agent for organic synthesis and photographic drugs, medicine, printing and dyeing mordant, buffer agent, chemical reagent, meat anticorrosion, pigment, tanning leather and many other aspects.

3, used as buffering agent, seasoning agent, fragrance enhancer and ph regulator. As a buffering agent, it can alleviate undesirable odor and prevent discoloration to improve flavor when used by 0.1% ~ 0.3%. It has certain mildew proof effect, such as using 0.1% ~ 0.3% in fish minced meat products and bread.

4, used as sulfur regulating neoprene rubber coking agent, the dosage is generally 0.5 mass. It can also be used as a crosslinking agent for animal glue.

5, this product can be used for alkaline plating tin addition, but has no obvious effect on the plating and plating process, is not a necessary ingredient. Sodium acetate is commonly used as a buffer, such as in acid galvanizing, alkaline tin plating and electroless nickel plating.