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Material recovery method of wastewater containing high-concentration ammonia-nitrogen and heavy metal ions and treatment system

A heavy metal ion, high-concentration technology, applied in the field of water treatment, can solve problems such as failure to meet discharge standards, and achieve the effect of reducing harm

Inactive Publication Date: 2013-12-25
SUZHOU SUJING ENVIRONMENTAL ENG
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Problems solved by technology

However, there are still a certain amount of metal ions in the wastewater treated by this method, which cannot meet the discharge standards, and most of the heavy metal ions and nitrogen elements in the wastewater are of use value. In line with the principles of reducing pollution, waste utilization and cost saving Valuable materials in wastewater should be treated and reused

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  • Material recovery method of wastewater containing high-concentration ammonia-nitrogen and heavy metal ions and treatment system
  • Material recovery method of wastewater containing high-concentration ammonia-nitrogen and heavy metal ions and treatment system
  • Material recovery method of wastewater containing high-concentration ammonia-nitrogen and heavy metal ions and treatment system

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Embodiment Construction

[0019] The preferred embodiment of the present invention will be described in detail below in conjunction with accompanying drawing:

[0020] Press as Figure 1-2 The connection relationship of the wastewater treatment system is shown. First, the generated high-concentration ammonia nitrogen and heavy metal ion wastewater is introduced into the collection pool 1 and mixed evenly, and then introduced into the pH adjustment pool 2, and NaOH solution is added to adjust the pH to 9.5~11, and fully mixed under stirring conditions , making heavy metal ions Cu in wastewater 2+ Same as OH - Reaction occurs to form Cu(OH) which is insoluble in water 2 , then the waste water enters the batch sedimentation tank 3 for precipitation, and the first-level supernatant produced is introduced into the filtrate tank 4, and the Cu(OH) 2 The sediment is extracted through the sludge suction device, and after being filtered by the filter 13, the filtrate enters the filtrate pool 4, and the Cu(OH)...

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Abstract

The invention relates to a material recovery method of wastewater containing high-concentration ammonia-nitrogen and heavy metal ions and a wastewater treatment system. The material recovery method comprises the following steps: regulating the pH value, ammonia stilling, precipitating, evaporating and the like. The invention further relates to the corresponding treatment system. After the adoption of alkali liquor to precipitate metal ions, sodium sulfide is continuously added to further remove the metal ions left in the waste liquor to reach the emission standard; stronger ammonia water, solid precipitates and the like produced during the wastewater treatment process are recovered to reduce the environmental harm effectively and produce certain economic benefits.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a material recovery method and a wastewater treatment system for wastewater containing high-concentration ammonia nitrogen and heavy metal ions. Background technique [0002] With the development of society and the progress of science and technology, people's exploration in the field of chemical industry is getting deeper and deeper, and various complex and high-concentration industrial production wastewater is also produced. For example, in metallurgy, electroplating, battery and other industries, high-concentration ammonia-nitrogen wastewater is often produced, and it also contains high-concentration inorganic salts and heavy metal ions. Although ammonia nitrogen can be removed from water by adjusting the pH of the solution to alkaline, and then using evaporation to transfer ammonia molecules to the gas phase. However, when there are heavy metal ions capable of ammonia complexat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01C1/10
Inventor 陈茂林钱为刘兴丁兆浩
Owner SUZHOU SUJING ENVIRONMENTAL ENG
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