Process for treating ammonia nitrogen wastewater by utilizing direct contact type degassing membrane technology
A technology for the treatment of ammonia nitrogen wastewater, which is applied in the application field of acid absorption method in the treatment of ammonia nitrogen wastewater, which can solve the problems of unrecoverable resources, long treatment cycle, secondary pollution, etc., and achieve convenient management, thorough ammonia removal, and realization of recycling The effect of using
Inactive Publication Date: 2013-07-03
JIANGSU XIAHANG ENVIRONMENTAL ENG
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Problems solved by technology
However, there are still disadvantages in these technologies such as secondary pollution, high cost, long treatment cycle, relatively low removal rate, and unrecoverable resources.
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[0029] The present invention will be further described below in conjunction with accompanying drawing:
[0030] Such as figure 1 , a process utilizing direct contact degassing membrane technology to treat ammonia nitrogen wastewater, comprising the following steps:
[0031] 1) The discharged wastewater containing impurities such as ammonia nitrogen enters the ammonia nitrogen wastewater pool. Through pre-treatment, remove most of the suspended solids, so that the SS value in the wastewater is ≤20mg / L;
[0032] 2) Then enter the wastewater circulation pool, add caustic soda solution and steam into the wastewater circulation pool, and adjust the pH value to 10-12 and the temperature to ≤55°C under the action of the mixer;
[0033] 3) Lifted by the wastewater circulating pump, the wastewater passes through the filter and enters the membrane side of the direct contact degassing membrane device;
[0034] 4) After the ammonia nitrogen wastewater comes out of the direct contact de...
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The invention relates to a process for treating ammonia nitrogen wastewater by utilizing the direct contact type degassing membrane technology, which is characterized by comprising the following steps: enabling discharged wastewater containing ammonia, nitrogen and other impurities to enter an ammonia nitrogen wastewater pool and removing most of suspended matters through pre-treatment, so that the SS value in the wastewater is less than or equal to 20 mg / L; then entering a wastewater circulating pool, adding caustic soda solution and steam in the wastewater circulating pool, regulating the PH value to the range of 10-12 under the action of an agitator and adjusting the temperature to be less than or equal to 55 DEG C; enabling the wastewater to enter one side of a membrane in a direct contact type degassing membrane device through a filter under the lifting of a wastewater circulating pump and; and returning to the wastewater circulating pool after the ammonia nitrogen wastewater goes out of a direct contact type degassing membrane to form an ammonia nitrogen wastewater circulation. The process has the benefits that the free ammonia is directly extracted from the ammonia nitrogen wastewater and can be made into ammonium sulfate solution with high concentration, so that resources are recycled; and the process has the characteristics of lower energy consumption, complete ammonia removal, low running cost, simplicity in operation, convenience in management and the like.
Description
technical field [0001] The invention relates to the field of environmental protection technology, in particular to a process for treating ammonia nitrogen wastewater by using direct contact degassing membrane technology. The invention can be directly used for the treatment of ammonia nitrogen wastewater, and specifically relates to the application of degassing membrane technology in the treatment of ammonia nitrogen wastewater, The application of direct contact degassing membrane technology in the treatment of ammonia nitrogen wastewater and the application of acid absorption method in the treatment of ammonia nitrogen wastewater. Background technique [0002] With the development of industrial and agricultural production, the discharge of ammonia nitrogen wastewater has risen sharply, which has become an important factor in environmental pollution. It has a relatively wide range of sources: such as the decomposition of nitrogen-containing organic matter; synthetic ammonia, ...
Claims
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IPC IPC(8): C02F9/04
Inventor 夏兰黄军平盛斌
Owner JIANGSU XIAHANG ENVIRONMENTAL ENG