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Pretreatment process of landfill leachate

A landfill leachate and pretreatment technology, which is applied in filtration treatment, contaminated groundwater/leachate treatment, sedimentation treatment, etc., can solve the problems of inability to meet the requirements of biochemical treatment, large amount of reagent addition, high ammonia nitrogen content, etc., and achieve improvement Biodegradability, simple process, and high process integration

Pending Publication Date: 2022-05-24
长沙工研院环保有限公司
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  • Abstract
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Problems solved by technology

However, using adsorbents to pretreat leachate will generate a large amount of waste adsorbents, which will easily cause secondary pollution if they are not harmlessly treated again
In addition, the traditional treatment method is relatively expensive due to the large amount of reagents added, and the treated sewage often cannot solve the problems of high salinity and high ammonia nitrogen content, and cannot meet the requirements of subsequent biochemical treatment

Method used

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  • Pretreatment process of landfill leachate
  • Pretreatment process of landfill leachate

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Embodiment

[0044] A pretreatment system for landfill leachate, comprising the following steps:

[0045] (1) Electro-flocculation: take the landfill leachate with COD concentration of 5000mg / L, ammonia nitrogen concentration of 1000mg / L, TP concentration of 40mg / L and SS concentration of 2000mg / L, first through screen treatment and then sent to the electro-flocculation device , the COD concentration of the landfill leachate is 5000mg / L, the ammonia nitrogen concentration is 1000mg / L, and the TP concentration is 40mg / L. Electroflocculation is carried out under the action of DC power supply and iron-iron cathode and anode plates. The flocculant generated by , complexation, etc. removes suspended solids, COD, total phosphorus, heavy metal ions and other pollutants, and the current density of electroflocculation is 15mA / cm 2 , the distance between the plates is 1cm, the electrolysis reaction is 30min, and after the electroflocculation reaction, the scum is removed by a slag scraper, and the e...

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Abstract

The invention discloses a landfill leachate pretreatment process which adopts a combined process of electric flocculation, electro-Fenton, ozone oxidation and coagulating sedimentation to pretreat landfill leachate, so that pollutants such as suspended solids, COD (Chemical Oxygen Demand), ammonia nitrogen, total phosphorus, turbidity and the like in wastewater can be synchronously removed, and the biodegradability of the wastewater can be improved; and the subsequent processing load is reduced.

Description

technical field [0001] The invention relates to a pretreatment process for landfill leachate, belonging to the technical field of landfill leachate pretreatment. Background technique [0002] Domestic waste refers to the solid waste generated in people's daily life or activities that provide services for daily life, as well as the solid waste that is regarded as domestic waste by laws and administrative regulations. The main source of domestic waste in my country is urban domestic waste. With the development of urbanization, the amount of domestic waste in my country has also increased significantly, which has brought environmental pollution and other issues that have gradually attracted widespread attention from all walks of life. Domestic waste is generally divided into four categories: recyclable waste, kitchen waste, hazardous waste and other waste. At present, the common disposal methods of domestic waste are mainly landfill, incineration, composting and recycling. Am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/06C02F101/16C02F101/10C02F101/30C02F101/34
CPCC02F9/00C02F2209/08C02F2209/14C02F2209/18C02F2209/11C02F1/001C02F1/463C02F1/66C02F2209/06C02F1/5209C02F2001/007C02F1/78C02F1/725C02F1/722C02F2305/026C02F2209/10C02F2103/06C02F2101/105C02F2101/16C02F2101/30C02F2101/34C02F1/5236C02F1/56C02F3/30C02F3/1268
Inventor 邱敬贤刘胜强曾木平孙慧智周益辉何曦刘芳王胜
Owner 长沙工研院环保有限公司
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