1. What is landfill leachate?

Garbage leachate refers to the secondary pollutants that occur during the accumulation and disposal process of waste due to the leaching and erosion of rainwater, as well as the soaking of surface water and groundwater through extraction, hydrolysis, and fermentation. The primary source is the water contained in the waste itself, the water generated by the biochemical reaction of the waste, and atmospheric precipitation.

Currently, the main methods of waste treatment in China are landfill and combustion. Therefore, the primary demand for leachate treatment is for waste landfills and incineration plants.

2. The water quality characteristics of landfill leachate

(1) High pollution concentration: COD concentration can reach tens of thousands of B/C, with low values and a wide range of changes;

(2) High ammonia nitrogen content: ammonia nitrogen exceeds 2000mg/L, making it difficult for conventional processes to meet standards;

(3) Nutritional imbalance: C/N imbalance brings certain difficulties to biological treatment.

3. Don't let the leachate from garbage destroy our home

Therefore, our company has launched an intelligent integrated equipment to treat this wastewater. The core process includes synchronous anaerobic digestion of sewage sludge, multi-stage oxidation, and MBR membrane reaction. The treated water quality can meet the stricter values of Class B in the Comprehensive Wastewater Discharge Standard (GB8978-1996) and the Water Quality Standard for Sewage Discharged into Urban Sewers (GB/T 31962-2015), making it easy to degrade various leachate.

3.1. Equipment characteristics

(1) Simple process and low operating costs;

(2) One click departure, fully automated operation;

(3) High integration to meet processing needs;

(4) Standard interface, easy and efficient installation;

(5) Small footprint and low basic investment.

3.2. Process technology

(1) Collect the leachate from garbage into a collection tank and pump it to an intelligent integrated device for efficient multi-stage oxidation treatment, membrane filtration system, disinfection and decolorization, and a series of treatment processes to ensure that the leachate meets the discharge standards.

(2) Core process: synchronized anaerobic digestion of sewage sludge+multi-stage oxidation+MBR membrane reaction. This process has the following advantages:

① Simple process, low investment, and low operating costs;

② Durable to impact loads, with strong adaptability;

③ Good solid-liquid separation effect and good effluent quality;

④ Stable operation and flexible operation;

⑤ Good biosolid retention ability;

⑥ Good biological distribution;

⑦ The technology for treating leachate from garbage is excellent.

3.3. Process flow diagram