Method for cleaning treatment of high-ammonia-nitrogen wastewater containing metal ions

A metal ion and cleaning treatment technology, which is applied in the cleaning treatment of high ammonia nitrogen wastewater and the field of wastewater treatment, can solve the problems of ammonia gas escape, reduce the removal rate of metal cations and ammonia nitrogen, and achieve the effect of high treatment efficiency
CN108002581AActive Publication Date: 2018-05-08ZHONGYE-CHANGTIAN INT ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHONGYE-CHANGTIAN INT ENG CO LTD
Publication Date
2018-05-08

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Abstract

A method for cleaning treatment of high-ammonia-nitrogen wastewater containing metal ions includes the following steps: 1) adding a mixed alkali into the wastewater, adjusting the pH of the wastewaterto be weak alkaline, and making metal ions form a precipitate; 2) adding a flocculant into the wastewater of the step 1), making the precipitate settled, and filtering, to obtain a filtrate and a filter residue; 3) transferring the filtrate into a tubular mixer, adding an alkaline solution, adjusting the pH of the filtrate in the tubular mixer to be strong alkaline; and 4) allowing the strong alkaline filtrate to pass through a fine filter system, and then transferring into a membrane absorption system, and removing ammonia. The invention provides the method for cleaning treatment of the high-ammonia-nitrogen wastewater containing the metal ions. The method has the advantages of clean treatment, simple operation and high treatment efficiency.
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Description

technical field

[0001] The invention relates to a wastewater treatment method, in particular to a method for cleaning and treating high ammonia nitrogen wastewater containing metal ions; it belongs to the field of resource and environment protection. Background technique

[0002] Ammonia nitrogen is one of the main pollutants in water bodies. The main harm of ammonia nitrogen to the environment is to cause eutrophication such as red tides and algal blooms, which seriously threaten ecological security. For the removal of ammonia nitrogen in wastewater, the common chemical precipitation method, stripping method, chemical oxidation method, biological method, membrane separation method, ion exchange method, etc. Because the membrane separation method has the advantages of low corrosion to equipment, high removal rate, and simple equipment, it is widely used.

[0003] A large amount of wastewater containing metal ions, such as iron, copper, lead, zinc, cadmium, cobalt, nickel, e...

Claims

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