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In the process of sewage treatment, foam problems are often a headache. Foam is mainly divided into two types:
Chemical foam - produced by detergents or surfactants under aeration and stirring.
Biological foam - caused by excessive growth of filamentous bacteria.
Don't worry! Here are 4 practical solutions to easily deal with foam problems:
1. Spray water to defoam
Spray the water surface directly with water to break up bubbles and quickly eliminate foam. Simple and efficient, suitable for emergency treatment.
2. Add chemical agents
Adding defoamers can quickly suppress foam with significant effects. However, it should be noted that long-term use may affect the sludge treatment effect, and short-term use is recommended.
3. Shorten sludge retention time
For excessive growth of actinomycetes, the sludge retention time (sludge age) of the aeration tank can be reduced to suppress foam generation.
4. Add biological carriers
Add fixed carriers to the aeration tank to allow microorganisms that are prone to foam to attach and grow. It can not only improve treatment efficiency but also reduce foam problems.
These four methods are easy to operate and you can choose the most suitable solution according to the actual situation to easily solve the sewage foam problem!
In the United States, the disinfection methods for hospital sewage treatment are mainly divided into two categories: one is the disinfectant prepared on-site, such as sodium hypochlorite generator and chemical chlorine dioxide dosing device;
Introduction: Why has hospital sewage treatment become the focus of environmental protection supervision?
In the process of sewage treatment, foam problems are often a headache. Foam is mainly divided into two types:
The U.S. sewage treatment industry is undergoing a major transformation. With more than half of the approximately 15,000 sewage treatment plants in the country having been in operation for more than 10 years, it is estimated that more than 3,000 sewage treatment plants will face the need for upgrades and renovations in the next decade under the stock optimization policy promoted by the Biden administration's "Bipartisan Infrastructure Act".
At present, the main methods of sewage treatment in hospitals in the United States are liquid chlorine disinfection, sodium hypochlorite disinfection, ozone disinfection and chlorine dioxide disinfection.
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