Urbanization leads to rising domestic waste, generating harmful landfill leachate. Proper treatment is crucial to prevent environmental and health hazards.
Activated carbon is vital for leachate treatment, effectively removing pollutants and ensuring safe discharge.
This article explains how to use activated carbon to optimize leachate treatment, aiming for minimal impact and resource recovery.
Treatment process of waste leachate
Refuse leachate is a highly concentrated polluted liquid produced by rainwater or other liquids seeping through a landfill site. It has a complex composition, which mainly includes dissolved organic matter (eg. humic acid, fulvic acid, etc.), heavy metal ions (e.g. lead, mercury, cadmium, etc.), and ammonia nitrogen. These pollutants pose a serious threat to the environment and human health, and therefore require effective treatment.
The waste leachate treatment process usually consists of three stages: pretreatment, biological treatment and deep treatment. Among them, the objective of deep treatment is to remove residual hard-to-degrade organic matter, heavy metal ions, etc., in order to meet more stringent emission standards. Activated carbon adsorption method, as an efficient deep treatment technology, can effectively remove the above pollutants and ensure the safety of the water environment.
The role of activated carbon in the treatment of waste leachate
Activated carbon plays a key role in the waste leachate treatment process. Its main functions include adsorption of organic pollutants, removal of heavy metals and ammonia nitrogen, and improvement of overall treatment efficiency.
- Adsorption of organic pollutants: The microporous structure of activated carbon gives it a very high specific surface area, which can effectively adsorb organic pollutants such as volatile organic compounds (VOCs) and difficult-to-biodegrade organic compounds (COD) in the leachate, and significantly reduce their concentrations.
- Remove heavy metals: activated carbon can capture and fix heavy metal ions in leachate, such as lead, cadmium, mercury, etc. through chemical adsorption mechanism, preventing them from harming the environment and health.
- Elimination of ammonia nitrogen: activated carbon can also effectively remove ammonia nitrogen in leachate, reduce the pollution of ammonia nitrogen to water bodies and improve the overall effect of leachate treatment.
Using activated carbon for deep treatment can make the removal rate of COD in garbage leachate reach more than 80%, and the removal rate of ammonia nitrogen reach more than 60%, and significantly improve the effluent water quality.
Characteristics of activated carbon in waste leachate treatment
- high adsorption efficiency: activated carbon has strong adsorption capacity for many kinds of organic pollutants and heavy metal ions.
- Wide range of application: activated carbon can treat different types of waste leachate without being affected by fluctuations in water quality.
- Simple operation: activated carbon adsorption method is simple and easy to control.
- Renewable: The saturated activated carbon can be regenerated to restore the adsorption capacity and reduce the treatment cost.
Activated carbon selection
Choosing the right activated carbon is critical to optimizing leachate treatment. In general, granular activated carbon is widely used in large-scale leachate treatment facilities because of its ease of recovery and regeneration. For leachate containing higher concentrations of organic compounds or heavy metals, activated carbon with higher adsorption capacity should be selected.
We recommend 8*16 mesh, 12*40 mesh or 8*30 mesh coal granular carbon with an lodine value of 900-1050, which is suitable for most leachate treatment processes and has high adsorption capacity and durability. Its granularity and pore structure design enable it to adsorb organic pollutants and heavy metals efficiently.
Parameters of Qizhong Coal Granular Activated Carbon:
| Specifications | Numerical |
| Mesh Size: | 8*16,12*40,8*30 |
| Iodine (mg/g) | 900-1050 |
| Moisture (%) Maximum | 5 |
| Ash≤(%) | 5(max) |
Features of activated carbon for Qizhong waste leachate treatment:
- High adsorption capacity: our activated carbon has a very high adsorption capacity and can effectively treat many types of pollutants.
- Versatility: applicable to different treatment processes and equipment to meet various treatment needs.
- Environmental performance: it meets environmental standards and reduces secondary pollution in the treatment process.
Conclusion
Qizhong can provide systematic design and technical support services to help customers realize the standard discharge and comprehensive utilization of leachate. If you encounter any problems in the process of leachate treatment, please feel free to contact me, our technical team will be happy to serve you, hand in hand to create a better home!
