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High-concentration ammonia nitrogen wastewater treatment method and system

A technology of ammonia nitrogen wastewater and treatment system, which is applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of chemical loss and imperfect equipment and facilities, and achieve Low operating cost, saving acid solution, and realizing the effect of sewage reuse

Inactive Publication Date: 2015-08-12
江苏梅鑫环境科技有限公司
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a high-concentration ammonia nitrogen wastewater treatment method and its system in order to solve the technical problems of medicament loss and imperfect equipment and facilities in the prior art

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  • High-concentration ammonia nitrogen wastewater treatment method and system
  • High-concentration ammonia nitrogen wastewater treatment method and system

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Embodiment Construction

[0039]The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0040] Take the sewage from the sewage homogenization pool, first pass the waste water into the reaction pool, add sodium hydroxide solution, make the pH value in the pool 8-12; then add MgCl to the waste water 2 solution and phosphate solution, the molar ratio of nitrogen to phosphorus is 1.0 to 1.4, and the molar ratio of magnesium to phosphorus is 0.8 to 1.2, and they are stirred and mixed for 120 minutes; the stirred and mixed wastewater is separated and precipitated to obtain the precipitated product magnesium ammonium phosphate, and the separated ammonia The precipitated product is first filtered through the filter cloth, then rinsed with tap water or pur...

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Abstract

The invention relates to the technical field of waste water treatment, in particular to a treatment method of high-concentration ammonia nitrogen waste water. The treatment method comprises the steps of adding alkaline liquor into the waste water, uniformly mixing, then adding fresh magnesium salt and phosphate liquor, settling, filtering, flushing and refiltering a settling product, drying and pyrolyzing the settling product, recovering a half of a pyrolyzed product to a mixing reaction tank, acidolyzing the other half of the pyrolyzed product continuously, recovering a solution after re-acidolysis to the mixing reaction tank, circulating for many times, then metering in the reaction tank, adding an appropriate amount of the magnesium salt and phosphate liquor, and allowing ammonia generated during treatment to react with an acidic solution to form ammonia salt. The invention further relates to a treatment system employing the method for treating the waste water. The treatment system comprises the mixing reaction tank, a settling tank, an aerobic catalytic oxidation tank, a filtering and flushing tank, a drying pyrolyzer, an acidolysis tank and an acidic solution absorption tank. The method realizes cyclic utilization of an agent, and saves the acidic solution. The treatment system is simple in structure and convenient to mount and operate.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method and system for treating high-concentration ammonia nitrogen wastewater. Background technique [0002] High-concentration ammonia nitrogen wastewater mainly comes from petrochemical plants, oil refineries, refrigerant plants, meat processing plants, wineries, paint and pigment plants, landfill plants, etc. Excessive ammonia nitrogen content in the water body will cause the deterioration of the ecological environment of the water body, endanger the survival of aquatic organisms such as fish and human health, form eutrophication of the water body, reduce the ornamental value of the water body, and increase the cost of water treatment. [0003] At present, there are three main types of treatment technologies for high-concentration ammonia-nitrogen wastewater at home and abroad: biological methods, physical methods, and chemical methods. The most widely used met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/52C01C1/16C01C1/242C02F101/16
Inventor 万玉山李娜王莉
Owner 江苏梅鑫环境科技有限公司
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