What should be paid attention to when dealing with landfill leachate?
What should I pay attention to when disposing of landfill leachate? Author: landfill leachate is a difficult organic waste water, sewage and other cities are different, thus changing the nature of leachate difficult to deal with, we have to abide by the relevant regulations in the construction process of landfill leachate treatment works, so To achieve the purpose of qualified emissions. Let's take a look at what we need to pay attention to when dealing with landfill leachate. 1. Seasonal changes in water volume and water quality The water volume and water quality treated by landfill leachate vary with the seasons. Generally speaking, the rainy season is from May to October, and the dry season is from November to April. The amount of water in the rainy and dry seasons has almost doubled, and the concentration of pollutants in the rainy season is much higher than that in the dry season. Different water quantity and water quality change response plans should be formulated during operation. 2. Anaerobic system If the anaerobic system of the landfill leachate treatment equipment adopts the UASB process, the influence of large water volume and water load should be avoided during operation to ensure the stability of the UASB process system. At the same time, attention should be paid to the phenomenon of water effluent, timely monitoring of anaerobic effluent, and timely treatment. 3. Supplementary carbon source As the emission standard is 'Pollution Control Standard for Domestic Waste Landfill Site' (GB 16889-2008), the total nitrogen emission standard is less than 40mg/L. Therefore, this project has designed and operated a secondary biochemical system. According to the actual influent water volume and water quality, the carbon source compensation and reflux ratio was adjusted in time to ensure that the total water output of the system reached the standard. 4. Membrane system is running. The garbage leachate treatment system mainly includes ultrafiltration system, nanofiltration system and reverse osmosis system. According to the water quality, membrane operating pressure and other parameters, the system can be repaired and maintained in time, cleaned and maintained regularly, and the system can run stably for a long time. 5. Safe operation of the main treatment unit of the landfill leachate treatment station should be equipped with toxic and harmful gas (methane, hydrogen sulfide) concentration detection and alarm devices, and warning signs should be hung, the regulating tank and anaerobic system should be equipped with methane and hydrogen sulfide, and the alarm device, The sludge dewatering room should be equipped with hydrogen sulfide detection and alarm devices, and related detection and alarm devices should be checked regularly.
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