Landfill leachate is a black or yellow-brown liquid with a foul odor, which is the same as domestic sewage and industrial sewage, which is dirty and smelly. It also contains a large amount of refractory organic compounds (such as various aromatic compounds and humus), inorganic salts (such as ammonium, carbonate and sulfate, etc.) and metal ions (such as chromium, lead and copper) and other components that you find difficult to handle.
Dirty, smelly, toxic and harmful are the natal words of landfill leachate. So, the question is, what methods can we all use to deal with landfill leachate? The answer is that there are roughly four approaches that can be employed, which are as follows:
Method 1: Circular spraying into the landfill.
This treatment method can be said to be one of the lower processing costs, and the operation is simple and convenient. However, there is a certain risk that the problem of leachate contamination cannot be fundamentally solved, and the production of leachate will be increased more and more.
Method 2: Combined treatment with municipal sewage plant.
The advantage of this treatment method is that there is no need to establish a landfill leachate treatment plant, but the investment is larger, not to mention that it also increases the unstable factors of the urban sewage plant, and it is more difficult to deal with it, and the complex components in the landfill leachate are easily mixed into the urban sewage for a long time, and the activated sludge is poisoned and other adverse symptoms.
Method 3: After pretreatment, it is fed into the municipal sewage treatment plant for combined treatment.
The advantage of this method is that the treatment process is relatively simple, which can reduce the risk of municipal wastewater plants, but the investment is still large and there is still a certain risk of pollution.
Method 4: It is to establish a separate sewage treatment station.
In this way, the quality of landfill leachate effluent can be ensured to meet the standard, and at the same time, the effective treatment of leachate can be realized, and the harm to the environment can be reduced. However, the disadvantage is that the requirements for the process are high.
In February, the dynamic incentive plan adopted new technologies to treat landfill leachate: SN coupled oxidation + biochemical treatment + advanced treatment
Existing productsFCM-IV series catalytic self-electrolytic materialsSAO3 series ozone catalystsThe products cover the whole chain of industrial wastewater treatment from high concentration to low concentration, and the SFAo3 non-membrane wastewater treatment technology has a good operation effect in landfill leachate treatment, and the effluent effect fully meets the standard.
The main advantages are embodied in:
1) The investment cost is low, the project area is reduced by about 20%, and the investment cost is more than 30% lower;
2) Significant reduction in operating costs (20-50%);
3) Strong impact resistance, good stability of system operation and effluent quality;
4) The biodegradability of wastewater is improved, and various pollutants such as heavy metals, COD, NH3-N and other pollutants are greatly reduced simultaneously to ensure the microbial activity and efficiency in the system;
5) Direct decomposition of pollutants, no concentration of existing double membrane technology, no concentration and accumulation of salt and organic matter, to ensure the sustainable and stable operation of the system to directly decompose pollutants.
It can achieve quantitative services, from wastewater water sample analysis to pilot test to engineering, the whole process technology splitting, and quantitative indicators.
Catalytic microelectrolysis technology is combined with ozone catalytic oxidation technology, which is used in:Landfill leachate engineeringIn the transformation project, the effluent meets the standard, the operating cost is reduced by 38% compared with the double membrane method, the investment cost is reduced by 32%, and there is no high-salt and high-concentration concentrate.