How to choose defoamer in sewage treatment
Foam is the most common and most likely medium in today’s society. For example, papermaking enterprises, textile printing and dyeing industries, and wastewater treatment enterprises all use products such as sewage treatment defoamers. So do you know how to choose defoamers for sewage treatment? The following defoamer manufacturers introduce:
In sewage treatment, the environment that is prone to foam is mainly biological aeration tanks and sewage discharge outlets. Sewage contains a large amount of surfactant, and foam is generated due to the continuous aeration in the biological aeration tank. The defoamer used in the biological aeration tank is required not to affect the activity of bacteria in the activated sludge while eliminating and suppressing foam. It is required to use non-silicon or defoamer products with less silicon as much as possible. The generation of foam at the discharge outlet is caused by the impact of water flow. This type of foam is relatively easy to eliminate. The requirements for the product are mainly to focus on fast defoaming as the first choice. High-efficiency silicone products have a fast foam breaking speed and can have a continuous foam control and suppression effect.
1. Choose according to different industries
Because there are many types of sewage, each type of sewage can be subdivided into sewage from many industries, so when choosing a sewage treatment defoamer, the defoamer should be selected according to different industries. Sewage treatment defoamer is just a general term and cannot be generalized. For example, the sewage generated in the textile industry must choose a textile sewage treatment defoamer, and the sewage generated in the papermaking industry must choose a papermaking sewage treatment defoamer. Only the sewage treatment defoamer suitable for this industry can more effectively solve the foam problem.
2. Choose a sewage treatment defoamer with good compatibility with the sewage treatment system
Before purchasing in large quantities, you can take a certain amount of foaming liquid for sample testing to check the compatibility of the defoamer. The specific operation can be to add the sewage treatment defoamer to the stock solution system, stir evenly and check the speed and stability of the compatibility of the two. If the compatibility is not good or affects the basic properties of the foaming system, then this defoamer cannot be selected.
