The issue of discharging sodium hypochlorite waste liquid
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This post was last edited by sunjl1981 on 2013-1-6 at 23:37. Question for advice: When chlorine gas is absorbed by alkaline solutions, a large amount of waste liquid containing sodium hypochlorite is generated. If this waste liquid is discharged directly into the sewage system, it can mix with acidic wastewater from other companies, leading to the decomposition of sodium hypochlorite and the release of chlorine gas. Environmental authorities do not allow the direct discharge of sodium hypochlorite-containing waste liquid into sewage systems. Does anyone have any solutions to this problem? I’m waiting online for answers~~~ -
The generated sodium hypochlorite can be sold as a product; it can be used for disinfection and other purposes, as well as as a bactericidal and algaecidal agent in circulating water
Generally, manufacturers increase the effective chlorine content of sodium hypochlorite; products with an alkali concentration of less than 1% can be sold on the market, and demand for such products is quite good.
If it fails to meet the standards, or if no buyer can be found temporarily, the only option is to discharge it. It is usually discharged into a tank for wastewater treatment.
It seems we discussed a similar issue some time ago
If the company itself does not consume that product, it becomes quite difficult; in such a case, it is necessary to find a product that can be consumed, or else some way needs to be found to sell it. There is also a need to find ways to reduce the amount generated.
Sodium hypochlorite can be sold as a commercial product for use in disinfection, etc. It can also be used, along with urea and magnesium sulfate heptahydrate, as raw materials to produce hydrazine hydrate, thereby completely solving the problem of sodium hypochlorite emissions
Do you have any staff assigned to the salt processing post? All of ours have returned to that post
1. Sold as a product (effective chlorine greater than 10%, free alkali less than 1%). 2. Return the brine once to remove algae and organic matter. 3. Apply the disinfectant product. 4. Algae removal in circulating water. The first and second are the main destinations.
Find a company with excessive COD levels and give it to them to try.
If the available chlorine level is high, it can be sold as a product; if it does not meet the standards, part of it can be used as sodium hypochlorite by adding it to brine. In any case, a higher level of free base is not a problem, as it helps to break down organic substances and eliminate bacteria and algae. It can also be added in small amounts when preparing chlorine absorption solutions, provided that there is a storage tank available for slow release.