Defoamers - Foam Control in Landfill Leachate Treatment
1.What is Landfill Leachate
Landfill leachate refers to high-concentration organic wastewater produced by landfills due to precipitation and the garbage itself. Its composition is very complex, with high biochemical oxygen demand (COD) and salt content, and high ammonia nitrogen value. If the direct discharge is not treated, it will cause serious pollution to the environment.
2. Foam hazards in landfill leachate treatment
The composition of landfill leachate is very complex, containing a variety of toxic and harmful inorganic and organic substances. At present, there are many treatment methods for landfill leachate, mainly physicochemical treatment (such as adsorption, coagulation sedimentation, advanced oxidation, electrolysis and membrane treatment, etc.), biochemical treatment, etc. Treatment (such as nitrification and denitrification treatment, etc.) and evaporation-solidification treatment, etc. Affected by the complex organic components, pressure, temperature and other factors, it is easy to produce a large amount of foam in the leachate treatment, causing serious harm. The main impacts are as follows:
01
With the accumulation of landfill leachate foam, the liquid level is high and it is easy to overflow, causing pollution to the equipment and the external environment, affecting the leachate treatment efficiency and the surrounding environment.
02
Too much foam in landfill leachate may lead to indicators of effluent quality, affect the stability of effluent quality, and fail to meet the discharge standards.
03
Too much foam is easy to entrain impurities, resulting in the accumulation of suspended matter, which is not conducive to membrane filtration treatment and affects the operation and stability of the membrane system.
04
Too much foam will greatly increase the manpower, time, equipment and other costs of landfill operations, affecting economic and environmental benefits.
Therefore, it is imminent to solve the foam problem, which has a positive effect on ensuring the stable operation of the landfill disposal site.
3. How to solve the problem of landfill leachate foam?
In the face of a series of disadvantages caused by leachate foam, it is necessary to add water treatment defoamer to solve such problems. The special defoamer for landfill leachate developed and produced by RISE Chemical is a new type of defoamer developed for various landfill leachate systems. The defoamer has the following characteristics:
* The new type of landfill leachate has fast defoaming speed and long foam suppression time, which can effectively eliminate biological fine foam, static and dynamic fine foam and large foam, as well as foam in viscous liquid;
* The defoamer has high efficiency and small dosage, which greatly reduces the cost of use;
*The silicone defoamer is easy to disperse, works quickly, and can deal with foam problems in extreme environments;
*The water treatment defoamer has excellent stability, high temperature resistance, acid and alkali resistance, not easy to break demulsification, not easy to separate out and oil drift;
*Antifoam is safe and environmentally friendly, non-corrosive, non-flammable and non-explosive, and has no adverse effect on the foaming system and subsequent processes.
