Landfill leachate is a kind of organic wastewater with high concentration, which comes from the water contained in the landfill itself, the rain and snow water and other water that enters the landfill, deducts the saturated water holding capacity of the garbage and the overlying soil layer, and goes through the garbage layer and the overlying soil layer.

The composition of garbage is very complex, so the landfill leachate produced is a kind of complex composition, high organic matter, high ammonia nitrogen, high salt wastewater, one of its characteristics is high content of pollutants, and often contains a certain toxicity.

According to relevant calculations, one ton of leachate is approximately equal to the concentration of pollutants contained in 100 tons of municipal sewage.

At present, China's landfill leachate production has reached more than 30 million tons per year.

Problems existing in landfill leachate treatment

According to the introduction of experts in relevant fields, there are still five problems in the treatment of landfill leachate in China:

1) High concentration of ammonia nitrogen makes it difficult to carry out biological nitrogen removal, resulting in the final effluent cannot reach the standard stably;

2) Strong toxicity and difficult biological treatment;

3) Low level of operation management;

4) Insufficient R&D investment;

5) Insufficient funds for facility construction and operation.

Landfill leachate treatment

All sewage treatment engineers are familiar with the characteristics of leachate. The quantity and quality of leachate are greatly affected by season, climate and other factors. The composition is complex, the concentration of pollutants is high and the biodegradability is poor.

For such landfill leachate treatment, can it be solved in one step?

"Can't!

Most leachate treatment processes adopt the process of "pretreatment + biochemical + advanced treatment".

# pretreatment

The pretreatment process will generally use: regulating tank + anaerobic system.

# biochemical

MBR process is commonly used for biochemical treatment

↑ pretreatment and biochemical treatment can be combined with the site situation, according to their own sewage treatment site needs to choose

# Depth processing

Advanced treatment is the result of the whole landfill leachate treatment, which determines whether the wastewater can be discharged.

As mentioned above, landfill leachate treatment needs to solve the problem of high ammonia nitrogen concentration.

After pretreatment and biochemical treatment, ammonia nitrogen can be degraded to a certain concentration, but if the discharge requirements are to be met, the landfill leachate needs to be deeply treated.

"Most sewage treatment engineers will choose a chemical treatment -- ammonia nitrogen remover. The removal rate can reach more than 96%, and the ammonia nitrogen in sewage can be quickly removed.

"Direct add, 5 minutes quick response

The removal rate is more than 96%

The cost is controllable, and the dosage can be adjusted according to the drop of on-site concentration.