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Composite denitrification additive for treating ammonia-nitrogen waste water
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A technology of ammonia nitrogen wastewater and nitrogen additives, applied in the direction of degassed water/sewage treatment, etc., can solve the problems of high treatment cost, complicated process, and difficult follow-up treatment of sediment
Inactive Publication Date: 2015-03-25
JIANGXI AMMONIA WATER POLLUTION GOVERNANCE NEMESIS
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Description
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Problems solved by technology
Such as precipitation method, adsorption method, ion exchange method, biochemical method, distillation method, stripping method, etc. Among them, ammonium magnesium phosphate precipitation method and adsorbent adsorption method are complicated in process, and the follow-up treatment of the precipitate is difficult; ion exchange method and biochemical method can only To treat wastewater with a low concentration of ammonia nitrogen, the steam distillation method has high energy consumption and high treatment cost; the air stripping method is a fast-developing method at present, because of its simple process, low cost of wastewater treatment, and easy recovery of ammonia nitrogen, but this method treats wastewater , the concentration of ammonia nitrogen remaining in the water is relatively high, and it is difficult to meet the discharge standard
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Embodiment 1
[0016] A compound denitrification aid component is (weight percent):
[0017] Cetyl alkanolamide 5%, its molecular formula is: CH 3( CH 2)14 CON(C 2 h 4 Oh) 2 , dodecyl imidazolinium ammonium 6%, its molecular formula is: CH 3( CH 2)11 CH 2 COO - , cetyl dimethyl betaine 7%, its molecular formula is: CH 3( CH 2)15 N(CH 3 ) + 2 COO - , anionic polyacrylamide (the viscosity average molecular weight is 1.5×10 6 ) 1%, water 81%;
[0018] The compound denitrification additive is applied to the wastewater treatment of a chemical company, the addition amount is 40g / ton, the pH value is adjusted to 12.0, the wastewater temperature is adjusted to 52°C, and the stripping treatment takes 4 hours, the ammonia nitrogen concentration in the wastewater is reduced from 30000mg / L to 2mg / L, the removal rate of ammonia nitrogen is over 99.99%.
Embodiment 2
[0020] A compound denitrification aid component is (weight percent):
[0021] Cetyl alkanolamide 7%, its molecular formula is: CH 3( CH 2)14 CON(C 2 h 4 Oh) 2 , dodecyl imidazolinium ammonium 9%, its molecular formula is: CH 3( CH 2)11 CH 2 COO - , anionic polyacrylamide (the viscosity-average molecular weight is 1×10 6 ) 0.5%, water 83.5%;
[0022] The compound denitrification additive is applied to the wastewater treatment of a coking company. The addition amount is 50g / ton, the pH value is adjusted to 11.5, the wastewater temperature is adjusted to 50°C, and the stripping treatment takes 3.5 hours. The concentration of ammonia nitrogen in the wastewater is reduced from 15000mg / L to 1mg / L, the removal rate of ammonia nitrogen is over 99.99%.
Embodiment 3
[0024] A compound denitrification aid component is (weight percent):
[0025] Dodecanoic acid alkanolamide 6%, its molecular formula is: CH 3( CH 2)10 CON(C 2 h 4 Oh) 2 , cetyl dimethyl betaine 15%, its molecular formula is: CH 3( CH 2)15 N(CH 3 ) + 2 COO - , anionic polycaprolactam (its viscosity-average molecular weight is 1.5×10 6 ) 1.5%, water 77.5%;
[0026] The compound denitrification additive is applied to the wastewater treatment of a pharmaceutical company. The addition amount is 35g / ton, the pH value is adjusted to 12.5, the wastewater temperature is adjusted to 55°C, and the stripping treatment takes 3 hours. The concentration of ammonia nitrogen in the wastewater is reduced from 20000mg / L to 1.5mg / L, the removal rate of ammonia nitrogen is over 99.99%.
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Abstract
A compound denitrification aid for ammonia nitrogen wastewater treatment, which is composed of any one or more of alkanolamide surfactants, alkyl imidazoline amphoteric surfactants, and alkyl betaine amphoteric surfactants A combination, one or two combinations of anionic polyacrylamide and anionic polycaprolactam, the two are mixed with water, and the alkanolamide surfactant? 3-15%, alkyl imidazoline amphoteric surfactant 3-15%, alkyl betaine amphoteric surfactant 3-15%, anionic polyacrylamide 0.1-5%, anionic polycaprolactam 0.1-5% %, water 45-90%. The compound denitrification additive for ammonia nitrogen wastewater treatment of the present invention can effectively reduce the Van der Waals force between ammonia molecules and water molecules, change the dynamic balance of ammonia molecules in the gas-liquid two-phase, and after treating high-concentration ammonia nitrogen wastewater, its ammonia nitrogen concentration can be reduced to 1-5mg / L, the removal rate of ammonia nitrogen can reach 99.99%.
Description
technical field [0001] The invention relates to waste water treatment, in particular to a composite denitrification aid for ammonia nitrogen waste water treatment. Background technique [0002] Ammonia nitrogen (NH3-N) is an important indicator in water quality standards, and excessive ammonia nitrogen is an important factor for the eutrophication of rivers and lakes. How to remove the high concentration of ammonia nitrogen in domestic sewage and industrial wastewater is a big problem in front of people. At present, there are many ways to remove the high concentration of ammonia nitrogen in wastewater. Such as precipitation method, adsorption method, ion exchange method, biochemical method, distillation method, stripping method, etc. Among them, ammonium magnesium phosphate precipitation method and adsorbent adsorption method are complicated in process, and the follow-up treatment of the precipitate is difficult; ion exchange method and biochemical method can only To treat...
Claims
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/20
Inventor 李明达李桂生施伟林陆业
Owner JIANGXI AMMONIA WATER POLLUTION GOVERNANCE NEMESIS
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