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Formula and preparation method of composite carbon source for denitrification

A composite carbon source, denitrification technology, applied in chemical instruments and methods, special compound water treatment, anaerobic digestion treatment, etc., can solve problems such as affecting the solubility of calcium acetate, avoid crystallization of lower temperature substances, reduce residual, low cost effect

Pending Publication Date: 2018-11-13
石泰山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ethanol has a low cost of use, but significantly affects the solubility of calcium acetate, sodium acetate, and glucose in water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Formula 1 with carbon source mass ratio of 50%

[0036] (a) Weigh 11g of calcium hydroxide (AR grade) and put it into a beaker (reactor), add 95g of water, gradually add 18g of acetic acid (AR grade) while stirring, the reaction is complete, the solution has no precipitation, and the reaction is exothermic.

[0037] (b) When the pH of the solution is adjusted to 6.5-9.0 with acetic acid or calcium hydroxide, the pH is gradually adjusted to 8.5.

[0038] (c) Add 19 g of sodium acetate trihydrate (AR grade) to the solution in step (b), and stir until completely dissolved.

[0039] (d) Add 64g of glucose monohydrate (AR grade) to the solution in step (c), and stir until completely dissolved.

[0040] (e) Leave the solution to room temperature.

[0041] (f) Slowly add 23g of ethanol (AR grade) to the solution in step (e), stir, and when a substance precipitates out, continue stirring until the precipitate is completely dissolved.

[0042] (g) leave the solution of st...

Embodiment 2

[0087] (7) Formula 1 with carbon source mass ratio of 40%

[0088] (a) Weigh 4.6g of calcium hydroxide (AR grade) into a beaker (reactor), add 97g of water, gradually add 7.5g of acetic acid (AR grade) while stirring, the reaction is complete, the solution has no precipitation, and the reaction is exothermic .

[0089] (b) When the pH of the solution is adjusted to 6.5-9.0 with acetic acid or calcium hydroxide, the pH is gradually adjusted to 8.5.

[0090] (c) Add 16 g of sodium acetate trihydrate (AR grade) to the solution in step (b), and stir until completely dissolved.

[0091] (d) Add 20 g of glucose monohydrate (AR grade) to the solution in step (c), and stir until completely dissolved.

[0092] (e) Leave the solution to room temperature.

[0093] (f) Slowly add 36g of ethanol (AR grade) to the solution in step (e), stir, and when the substance precipitates, continue stirring until the precipitate is completely dissolved.

[0094] (g) leave the solution of step (f) s...

Embodiment 3

[0125] (11) Formula 1 with a carbon source mass ratio of 30%

[0126] (a) Weigh 3.4g of calcium hydroxide (AR grade) into a beaker (reactor), add 98g of water, gradually add 5.5g of acetic acid (AR grade) while stirring, the reaction is complete, the solution has no precipitation, and the reaction is exothermic .

[0127] (b) When the pH of the solution is adjusted to 6.5-9.0 with acetic acid or calcium hydroxide, the pH is gradually adjusted to 8.5.

[0128] (c) Add 12 g of sodium acetate trihydrate (AR grade) to the solution in step (b), and stir until completely dissolved.

[0129] (d) Add 9 g of glucose monohydrate (AR grade) to the solution in step (c), and stir until completely dissolved.

[0130] (e) Leave the solution to room temperature.

[0131] (f) Slowly add 22 g of ethanol (AR grade) to the solution in step (e), stir, and when a substance precipitates out, continue stirring until the precipitate is completely dissolved.

[0132] (g) leave the solution of step ...

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PUM

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Abstract

The invention relates to a formula and a preparation method of a composite carbon source for denitrification, and relates to prevention and control of water pollution. The formula comprises the following components: 0 to 20% of calcium acetate, 5% to 25% of sodium acetate, 5% to 40% of glucose, 0 to 20% of ethanol, and 40% to 70% of water, of which the total amount is 100%. The formula at least comprises sodium acetate, glucose and water, and the mass percent of the carbon source material in the carbon source formula is 30% to 60%. The preparation method comprises the following steps: injecting tap water into a reaction kettle and stirring, adding calcium hydroxide, and injecting acetic acid; controlling the reaction temperature and pH, and reacting to generate a calcium acetate solution;adding sodium acetate trihydrate until completely dissolved; adding glucose monohydrate and stirring until completely dissolved; when the temperature of the solution is lowered to room temperature, adding ethanol. The solution is pumped out of the reaction kettle to a storage tank for standing, and a supernatant liquid is the prepared composite carbon source for denitrification.

Description

technical field [0001] The invention relates to water pollution prevention and control, in particular to a formula of a composite carbon source for denitrification and a preparation method thereof. Background technique [0002] In the advanced denitrification treatment of the existing sewage treatment, due to the insufficient carbon source of the sewage itself, it is necessary to add an additional carbon source as a reducing agent. Common carbon sources are methanol, ethanol, acetic acid, sodium acetate trihydrate, glucose monohydrate, etc., all of which are directly added by a certain product. [0003] The denitrification carbon source mainly uses the hydrocarbons in the organic matter as electron acceptors to reduce the nitrate nitrogen in the sewage under the catalysis of denitrification bacteria. The higher the carbon and hydrogen content in the carbon source, the less the consumption of denitrification substances. Hydrocarbons such as methane, benzene, and toluene do n...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCC02F3/28C02F2305/06
Inventor 石泰山
Owner 石泰山
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