A method for treating tungsten wastewater containing ammonia and nitrogen

By treating tungsten wastewater through filter press and RO desalination system, the problem of incomplete removal of ammonia nitrogen in the existing technology is solved, and efficient and low-cost tungsten wastewater treatment and resource recycling are achieved.

CN118388080BActive Publication Date: 2025-09-23XIAMEN TUNGSTEN CO LTD
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Patent Information

Application Number
CN202410619431.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-05-17
Publication Date
2025-09-23
Estimated Expiration
2044-05-17

AI Technical Summary

Technical Problem

Existing tungsten wastewater treatment methods cannot effectively remove ammonia nitrogen, resulting in excessive ammonia nitrogen content in the treated wastewater. The treatment cost is high and the process is complicated, making it difficult to achieve resource recycling and posing a risk of secondary pollution.

Method used

A filter press, acid adjustment and RO desalination system is used to treat tungsten wastewater containing ammonia and nitrogen. Suspended matter and colloids are removed by filter press, and the pH value of the membrane effluent is controlled within the range of 4-6. The RO membrane group is used for desalination, and the flow ratio of concentrated water to fresh water is adjusted within 1: (3-7) to ensure the stable operation of the membrane system.

Benefits of technology

It significantly improves the removal efficiency and enrichment effect of ammonia nitrogen, reduces treatment costs, reduces the amount of discharged wastewater, ensures the quality of effluent water, and realizes green and clean production and resource recycling.

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Abstract

The invention discloses a method for treating tungsten wastewater containing ammonia nitrogen. The method comprises the following steps: subjecting the tungsten wastewater containing ammonia nitrogen to pressure filtration, acid adjustment, and an RO desalination system for treatment, thereby significantly improving the enrichment effect and removal efficiency of ammonia nitrogen, reducing the amount of wastewater entering a stripping tower for treatment, saving treatment costs, and improving the efficiency of tungsten wastewater treatment. The method ensures that the effluent water quality indicators meet the standards and can be directly discharged or reused, thereby reducing the amount of discharged wastewater, and realizing efficient treatment of tungsten wastewater, green and clean production, and resource recycling.
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