Ammonia-nitrogen wastewater treatment technology

A treatment process, a technology for ammonia nitrogen wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, ammonia preparation/separation, etc., to achieve the effects of easy maintenance, high removal rate and small investment

Active Publication Date: 2013-07-03
JIANGSU XIAHANG ENVIRONMENTAL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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The whole process is divided into two stages

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with accompanying drawing:

[0036] Such as figure 1 , The wastewater containing impurities such as ammonia nitrogen discharged from the production workshop enters the ammonia nitrogen wastewater pool. The waste water is lifted and pumped to the high-efficiency coagulation-settler, and PAM and PAC flocculants are added through the dosing device, and most of the colloids and suspended solids are removed in the high-efficiency coagulation-settler, so that the SS value in the wastewater is ≤20mg / L; Then enter a section of wastewater circulation pool, add caustic soda solution and steam into the section of wastewater circulation pool, and adjust the pH value to the range of 10-12 and the temperature to the range of 25-55°C under the action of the mixer, and pass through a section of circulation After the pump lifts through a section of filter, it enters one side of the membrane in a degassing membrane dev...

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Abstract

The invention discloses an ammonia-nitrogen wastewater treatment technology, which is characterized by comprising the following steps: 1) wastewater with ammonia, nitrogen and other impurities enters into ammonia-nitrogen wastewater pool to be sent to an efficient coagulating sedimentation device through a waste water lift pump, PAM and PAC flocculants are added through a medicine dosing device, and most of the colloid and the suspended solids are removed in the efficient coagulating sedimentation device to allow the SS value of the wastewater to be less than or equal to 20 mg / L; 2) then the wastewater enters into a section of wastewater circulating pool where caustic soda solution and steam are added; 3) the wastewater is lift by a section of a circulating pump to pass through a section of a filter so as to enter into and circulate at one side of a membrane of a section of a degassing membrane device; 4) the section of the degassing membrane device adopts vacuum degassing method, free ammonia in the wastewater is separated to enter into the other side of the membrane in the section of the degassing membrane device and is pumped out under the action of a vacuum-pumping device to enter into an ammonia absorption device. According to the treatment technology, free ammonia is extracted from ammonia-nitrogen wastewater directly to manufacture ammonia water with high concentration to realize the recycle of resources.

Description

technical field [0001] The invention can be directly used for the treatment of ammonia nitrogen wastewater in the titanium dioxide production industry, especially a process for treating ammonia nitrogen wastewater. The present invention can be applied to the following fields: application of degassing membrane technology in ammonia nitrogen wastewater treatment; application of vacuum degassing method in ammonia nitrogen wastewater treatment; application of direct contact degassing method in ammonia nitrogen wastewater treatment; acid absorption method in ammonia nitrogen wastewater treatment Application in wastewater treatment; directly recover ammonia water from ammonia nitrogen wastewater (resource recovery); directly use waste acid generated in production to treat ammonia nitrogen wastewater (waste utilization). Background technique [0002] With the development of industrial and agricultural production, the discharge of ammonia nitrogen wastewater has risen sharply, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01C1/02
Inventor 夏兰黄军平盛斌
Owner JIANGSU XIAHANG ENVIRONMENTAL ENG
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