Advanced treatment method of garbage permeate fluid

Abstract

The invention provides an advanced treatment method of garbage permeate fluid, and belongs to the technical field of multi-stage treatment of water, wastewater or sewage. To-be-treated garbage permeate fluid is sequentially subjected to external ceramic MBR membrane filtration, electrolytic flocculation precipitation, single-stage DTRO, nanofiltration and bipolar electrolytic treatment; NaOH, HClOand NaClO solutions are formed at a bipolar electrolytic cell; NaOH is fed into a nanofiltration mechanism and the single-stage DTRO through an external circulating pipe to be used as chemical cleaning agents, and the HClO and NaClO solutions are fed into an electrolytic flocculation mechanism to be used as strong oxidants. The method is applied to treatment of garbage permeate fluid or sewage with the same property, and has the advantages of being stable in degradation, low in cost, capable of recycling effective components for multiple times and the like.

Description

technical field [0001] The application relates to a method for advanced treatment of garbage permeate, and belongs to the technical field of multi-stage treatment of water, waste water or sewage. Background technique [0002] Garbage is solid waste generated in human daily life and production. In the field of domestic waste disposal, landfill is still the main method of waste disposal in my country. Landfills inevitably produce landfill leachate, which is a high-concentration organic wastewater with complex components, high pollutant concentration, and high toxicity. And there are many factors for the change of landfill leachate water quality, such as the age of landfill, landfill method, geographical location and environmental changes. [0003] High concentration of ammonia nitrogen is one of the main water quality characteristics of leachate, and the concentration of ammonia nitrogen in leachate varies according to the landfill method and garbage composition. In addition...

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Problems solved by technology

[0005] (1) The ammonia stripping method needs to add a large amount of alkali (usually calcium hydroxide) to the leachate for effective neutralization, but there will be fouling of the equipment, so after the stripping treatment, acid treatment should be carried out, and the The gaseous ammonia nitrogen produced is effectively recovered, and the addition of the corresponding recovery device will increase the processing cost

[0006] (2) The biological deamination technology is mainly used in the landfill leachate with low concentration of ammonia nitrogen. The high concentration of ammonia nitrogen and the imbalance of C / N ratio in the leachate will have a certain inhibitory effect on the biological treatment system and the biological balance system, resulting in biological deamination. Nitrogen cannot be effectively implemented

Activated carbon can effectively remove dissolved organic matter and microorganisms in landfill leachate, and can also play a role in decolorization and deodorization, but its mass is relatively small, its adsorption capacity has certain limitations, and it is prone to clogging; chemical The effect of the oxidation method is to reduce the concentration and color of the biodegradable organic matter in the leachate, so as to effectively improve its biodegradability, but it needs to be realized with the help of an oxidant, and the cost of the oxidant is relatively high, which makes this technology in engineering. The expected range in the

At present, nanofiltration and reverse osmosis technologies are mainly used to industrially treat landfill leachate, but this technology has certain defects: the service life of nanofiltration and reverse osmosis equipment is short, the maintenance cost of membranes is high, and the nanofiltration The water output of filtration and reverse osmosis will change with temperature, so this technology has not been widely used in the treatment of landfill permeate

[0008] With the continuous development of technologies such as ultrasonic, microwave and auxiliary methods, the use of strong oxidizing properties of hydroxyl radicals to remove organic matter can not only obtain good treatment effects, but also effectively improve the biodegradability of waste permeate, thereby avoiding the occurrence of Secondary pollution, such a treatment method can be used as pretreatment for biological treatment of landfill leachate, but this technology is still in the experimental research stage, and there is still a certain distance from large-scale application in industry

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