The process of collecting landfill leachate

All kinds of equipment must have operating procedures, stipulate the operation steps, landfill leachate treatment equipment operating procedures are mainly based on the equipment manufacturing plant's instructions and the site conditions are formulated, workers must operate in strict accordance with the operating procedures, and the equipment should be recorded in the process of use.

Formulate equipment maintenance standards for landfill leachate treatment equipment, and restore technical performance through maintenance. For some equipment, it is necessary to clarify the boundaries of large, medium and minor repairs, and implement the division of labor. The maintenance cycle of the main equipment must be clarified, regular maintenance must be implemented, and no repair should be thought of when the damage is very serious.

For routine repairs, maintenance material quotas should be formulated to reduce maintenance costs, and each maintenance should be recorded in detail.

1. The composition of landfill leachation is relatively complex. The leachate contains substances such as low-molecular-weight fatty acids, humic polymers, and medium-molecular-weight griseronic acid.

2. The identification showed that there were more than 90 kinds of organic pollutants in the landfill leachate. High concentration of ammonia nitrogen is one of the main water quality characteristics of leachate from "middle-aged and elderly" landfills, and it is also an important reason for its treatment difficulties.

3. High heavy metal content, high chromaticity and foul odor. The leachate of landfill contains a variety of heavy metal ions, and the dissolution of heavy metal ions is large after being mixed with industrial waste. Its chromaticity can be up to 2000 to 4000 times higher, and it has a very strong rancid odor.

4. The proportion of microbial nutrients in landfill leachate is out of balance. The content of organic matter and ammonia nitrogen in landfill leachate is too high, while the content of phosphorus is generally low.

5. The concentration of COD and BOD in the leachate of the landfill is very high, up to tens of thousands, and the BOD is also reaching thousands, and with the extension of the landfill time, the BOD COD is even lower, which indicates that the biodegradability of the leachate after stabilization and aging is poor.

6. The main factors affecting the water quality of landfill leachate are garbage composition, moisture content, internal temperature, landfill time, landfill method, rainfall leachate volume and other factors, especially rainfall and landfill time have a great impact on landfill leachate treatment.

Hello, I'm sorry to let you wait for a long time, 1. Integrated sewage treatment equipment This equipment is developed by a professional team and is one of the more popular equipment on the market. The integrated sewage treatment equipment can quickly and efficiently deodorize and kill the beam and search for fibrous bacteria, so that the domestic waste leachate can reach the national level 1 A standard after treatment, it integrates a variety of treatment processes, the effluent water quality is stable, the area is small, the cost is low, and there is no need for people to be on duty, and it can be intelligently controlled. 2. Biological treatment equipment: This kind of equipment mainly refers to anaerobic treatment equipment, aerobic treatment equipment or equipment combining aerobic + anaerobic.

Although these equipment can solve some of the problems of domestic waste leachate, they occupy a relatively large area, and they need to be installed separately to completely remove leachate. 3. Physical and chemical treatment equipment, as the name suggests, physical and chemical treatment equipment is mainly equipment for treating leachate with the help of some chemical reactions or physical reactions, such as chemical precipitation equipment, membrane dialysis, chemical oxidation equipment, etc. Their treatment systems are also very large, similar to biological treatment equipment, and they all need to be installed separately to achieve better treatment results.

The main sources of landfill leachate are from five sources.

1. The infiltration of precipitation, precipitation includes rainfall and snowfall, and the leaching effect of rainfall is the main reason for the production of leachate.

2. Inflow of external surface water. This includes surface runoff and surface irrigation.

3. Infiltration of groundwater. When the leachate level in the landfill is lower than the off-site water level, groundwater may seep into the landfill without a seepage prevention system in place.

4. The garbage itself contains moisture, including the moisture carried by the garbage itself, as well as the water adsorbed from the atmosphere and rainwater.

5. The water produced by the decomposition of garbage, after the landfill, the organic components in the garbage will also produce water under the anaerobic decomposition of microorganisms.

2. Surface runoff: The runoff from the upslope direction of the site surface also has a great impact on the amount of leachate.

3. Groundwater: If the bottom of the landfill site is lower than the groundwater level, the groundwater may seep into the landfill and form leachate. Anti-seepage measures in design and construction can avoid or reduce the amount of groundwater infiltration.

5. Decomposition of organic matter to produce water: the organic components in the garbage are anaerobic in the landfill.

When the water content of the waste is 47%, leachate can be produced per ton of waste. The reason is that the production of landfill leachate is affected by many factors, not only the water volume changes greatly, but also the change is irregular.

The main factors affecting the amount of leachate in landfills are: garbage factor, that is, the water content of garbage, when the water content of garbage is 47%, leachate can be produced per ton of garbage; Climatic factors, i.e. precipitation and evaporation, and the leaching of rainfall are the main causes of leachateInflow of external surface water;

Infiltration of groundwater;Water produced by the anaerobic decomposition of microorganisms after landfilling;Time factor, the above five factors have the cumulative effect of time.

The calculation of landfill leachate generation is one of the important contents of landfill engineering design and environmental impact assessment, and is one of the important prerequisites for the design of landfill sewage treatment project. The amount of leachate produced is a very complex issue. At present, a variety of calculation methods proposed at home and abroad are basically based on the principle of water balance and profit and loss, and most of the methods for calculating leachate at home and abroad are water balance method, empirical formula method, empirical statistical method and model analysis method.