Method and system for processing leachate of garbage burning factory

Abstract

The invention relates to a treatment method and a system of leachate of a garbage incineration plant. The method comprises that: a coagulant is added into the leachate to carry out coagulative precipitation pretreatment and to remove suspended matter; after the pretreatment, evaporation and concentration treatment are carried out on the leachate to obtain condensate water, and residue and raffinate of contaminants are removed; ammonia stripping treatment is carried out on the condensate water to remove ammonia and nitrogen; after ammonia stripping treatment, after-treatment is carried out on the condensate water to meet the environmental discharge standard. The system comprises a pretreatment system, an evaporation and concentration system, an ammonia stripping system and an after-treatment system which are connected in sequence. The invention is applicable to treating various garbage leachates with high concentration, including leachate with low content of biochemical contaminant, and can reach national primary discharge standard; heat energy of garbage incineration is used for treating leachate, thus realizing the purpose of treating waste with waste without secondary pollution; the invention has the advantages of low cost of investment and operation, energy saving, and long-term operational feasibility and load and impact resistance which are superior to prior art; the performance and operation of the invention are not restricted by foreign technology.

Description

technical field [0001] The invention relates to a sewage treatment process, and also to a system for realizing the process, more specifically, to a leachate treatment method and system of a garbage incineration plant. Background technique [0002] With the rapid development of the economy and the continuous improvement of people's living standards, the output of municipal solid waste has also increased rapidly. Among the various methods of urban waste disposal, waste incineration has great advantages in terms of reduction, harmlessness, and resource utilization compared with sanitary landfill and composting, especially in highly populated, densely populated areas. Large and medium-sized cities and coastal economically developed areas with tight land resources and high waste calorific value have vigorously developed waste incineration treatment methods. [0003] In the municipal waste incineration treatment method, due to the large amount of kitchen waste, high moisture cont...

AI Technical Summary

Problems solved by technology

[0017] 2. Large power consumption and high operating costs

[0018] 3. Non-biodegradable substances have a huge toxic effect on microorganisms

If the aerobic process of the MBR unit can only degrade the COD to 20000mg / l, and the COD of the MBR effluent can reach less than 2000mg / l, there must be a large amount of non-biodegradable substances trapped in the nitrification tank by the UF membrane. Will have a huge toxic effect on microorganisms;

[0019] 4. High engineering cost and operating cost

Considering the sewage treatment factors caused by frequent replacement of membranes and frequent backwashing of membranes due to the extremely easy clogging and poisoning of membrane equipment when treating high-concentration leachate, the above-mentioned operating costs will be higher

Images