A sewage nitrogen and phosphorus removal agent and preparation method thereof

A nitrogen and phosphorus removal agent, a technology for denitrification and phosphorus removal, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc. step-by-step

Active Publication Date: 2021-08-20
江苏艾特克环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical sedimentation method uses calcium carbonate and other chemical reagents to settle the phosphorus in the sewage, forming a large amount of sludge, and at the same time, it cannot meet the "Pollutant Discharge Standards for Urban Wastewater Treatment Plants" GB18919-2002; the biological nitrogen and phosphorus removal method is clean and efficient, However, denitrification and phosphorus removal cannot be completed in one step, and anaerobic ponds, aerobic ponds, etc. are required, which require a large area, high economic investment, high energy consumption, and complicated process flow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] As a preferred version, the preparation method of double hydroxyl metal oxide comprises the following steps:

[0040] A. Dissolve the metal inorganic salt in an organic solvent and stir at 20°C-40°C for 10min-30min to obtain solution H;

[0041] B. Add sodium carbonate or sodium hydroxide to the H solution to adjust the pH value of the solution to 12-14, add substances containing organic anion groups to the solution, stir at 70°C-90°C for 2h-4h, and obtain mixture B ;

[0042] C. Add sodium azide to mixture B, and stir at 70°C-90°C for 3h-6h to obtain mixture C;

[0043] D. After the mixture C is cooled to room temperature, continue to stir for 5h-10h, add ether and n-hexane mixed solvent to extract to obtain crystal D, wash crystal D with absolute ethanol until neutral, and obtain the double hydroxyl metal oxide.

[0044] As a preferred version, the metal inorganic salt is one or more of manganese chloride, cobalt chloride, calcium chloride, zinc chloride and any one...

Embodiment 1

[0056] 200g ethanol, 200g acetonitrile, 100g cobalt chloride, 100g manganese trichloride, 200g sodium benzoate, 50g sodium azide, 300g sodium carbonate;

[0057] 1. Dissolve 100g of cobalt chloride and 100g of manganese trichloride in 200g of ethanol and 200g of acetonitrile and stir at 25°C for 20min to obtain solution A;

[0058] 2. Add 300g of sodium carbonate to solution A to adjust the pH value of the solution to 12, heat to 70°C, add 200g of sodium benzoate under stirring conditions, keep the temperature constant and continue stirring for 4 hours to obtain mixture B;

[0059] 3. With the temperature kept constant, add 50 g of sodium azide to the mixture B and keep stirring for 6 hours to obtain the mixture C;

[0060] 4. After the mixture C was cooled to room temperature, the stirring was continued for 5 h, and a mixed solvent of diethyl ether and n-hexane was added for extraction to obtain crystal D, which was washed with absolute ethanol until neutral to obtain double ...

Embodiment 2

[0065] 300g ethanol, 100g toluene, 100g calcium chloride, 100g manganese trichloride, 200g sodium nitric acid, 50g sodium azide, 200g sodium hydroxide;

[0066] 1. Dissolve 100g of calcium chloride and 100g of manganese trichloride in 300g of ethanol and 100g of toluene and stir at 30°C for 20min to obtain solution A;

[0067] 2. Add 200g of sodium hydroxide to solution A to adjust the pH value of the solution to 13, heat to 80°C, add 200g of sodium nitric acid under stirring conditions, keep the temperature constant and continue stirring for 5 hours to obtain mixture B;

[0068] 3. With the temperature kept constant, add 50 g of sodium azide to the mixture B and keep stirring for 6 hours to obtain the mixture C;

[0069] 4. After the mixture C was cooled to room temperature, the stirring was continued for 5 h, and a mixed solvent of diethyl ether and n-hexane was added for extraction to obtain crystal D, which was washed with absolute ethanol until neutral to obtain double hy...

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PUM

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Abstract

The invention discloses a nitrogen and phosphorus removal agent for sewage and a preparation method thereof, which comprises the following components in mass percentage: 30%-50% of double hydroxyl metal oxide, 30%-40% of glass fiber, and 10% of adhesive %‑20%; the general formula of double hydroxyl metal oxide is [M 2+ 1‑x m x 3+ (OH) 2 ] x+ (A n‑ ) x / n mH 2 O, where M 2+ is a divalent metal ion, M 3+ is a trivalent metal ion, A n‑ is an organic anion, x, m, and n are positive integers; the adhesive is a thermoplastic adhesive; the double hydroxyl metal oxide is loaded in the glass fiber through the adhesive, and can perform one-step adsorption of nitrogen and phosphorus in sewage , the technological process is simple, the service life is long, and it has industrial value.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage nitrogen and phosphorus removal agent and a preparation method thereof. Background technique [0002] The wastewater discharged by enterprises in chemical parks has complex water quality, containing a large amount of ammonia nitrogen and phosphorus, the water quality fluctuates greatly, there are many refractory substances (COD), and the biodegradability is extremely poor. Because the original nitrogen and phosphorus removal treatment facilities or treatment processes are simple and imperfect, there are many problems, and it is difficult to meet the needs of nitrogen and phosphorus-containing wastewater treatment in chemical industry parks. At present, the sewage treatment plants in the chemical industry park in the Taihu Lake Basin are mainly upgraded from the aspects of secondary intensified treatment, chemical synergistic phosphorus removal, and advanced trea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F101/16C02F101/10
CPCC02F1/288C02F2101/105C02F2101/16
Inventor 蒋素英吴智仁徐畅王磊李俊波
Owner 江苏艾特克环境工程有限公司
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