The treatment of waste leachate generally adopts biological treatment as the main process for treatment. According to the process flow can be divided into three processes: pretreatment, main treatment and deep treatment. Pre-treatment process generally adopts physical and chemical methods, for the pretreatment of biochemical treatment, including precipitation, ammonia removal, etc., can effectively reduce the concentration of ammonia and nitrogen, and at the same time to remove part of the COD and leachate in the vast majority of heavy metal ions, to reduce the biological toxicity, to ensure the normal operation of the biological treatment process and the treatment effect, especially for the age of the garbage leachate, it is necessary to carry out pre-treatment. The main treatment process of garbage leachate basically adopts biochemical treatment, which is a combination of various anaerobic and aerobic methods. Anaerobic and forced denitrification biochemical processes are generally used, which have a high removal rate of organic matter and ammonia nitrogen, and are the main treatment measures for organic matter in wastewater. After pretreatment and biochemical treatment of waste leachate, degradable organic matter is basically removed, and humic acid substances that are extremely difficult to biodegrade, conventional biochemical and physical processes are difficult to deal with, while ammonia and nitrogen in the wastewater is converted to nitrate nitrogen due to aerobic biochemistry, and the denitrification effect of the existing biochemical system is slightly weaker, so the COD and total nitrogen of the treated effluent are still high, and in order to meet the requirements of the emission standards, it is necessary to In order to meet the requirements of the emission standards, it is necessary to carry out deep treatment. If there is a need, you can consult the Wuhan Techmon Environmental Engineering, they are very professional in this area.