KR19990083819A - Inorganic chemical treatment of waste water - Google Patents

Abstract

The present invention relates to a method for inorganic chemical treatment of livestock wastewater, which adds a metal sample and an acid solution to livestock wastewater, and then floats an ionic material by applying a voltage in an electrolytic flotation device for about 30 minutes, and then removes suspended solids. It is used as a fertilizer, adds activated carbon to the liquid from which the suspended matter is removed, adjusts the color, sterilizes and adds ozone to treat the wastewater. Likewise, materials that are difficult to remove can be easily removed and their efficiency is also excellent.

Description

Inorganic chemical treatment of waste water

The present invention relates to an inorganic chemical treatment method for livestock wastewater, and more particularly, to a method for treating livestock wastewater by ionizing urea, which is a major substance of livestock wastewater, with an electrolytic sample and an acid solution.

With the development of the industry, a large amount of environmental pollutants, including wastewater, is generated, resulting in serious pollution of the air, water, and soil. Among these, pollutants generated from livestock, agricultural production, and life cause water pollution in rivers, their treatment is very difficult, and their environmental impact is also serious.

To this end, various methods have been researched and developed to treat livestock wastewater, including livestock wastewater, mainly by using flocculants or by electrochemical methods.

However, when treating wastewater, in particular livestock wastewater through the conventional method, there is a problem that the treatment efficiency is very insufficient.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inorganic chemical treatment method for livestock wastewater which has excellent livestock wastewater treatment and can be treated with high selectivity under normal temperature and atmospheric pressure.

It is another object of the present invention to provide an inorganic chemical treatment method for livestock wastewater, which is capable of selectively ionizing and floating substances that are difficult to remove, such as urea dissolved in wastewater, ammonia nitrogen compounds, and phosphorus compounds.

Livestock wastewater treatment method of the present invention for achieving the above object comprises the steps of adding a metal sample to the toxic organics containing urea and other nitrogen-based materials, and then ionizing the acid solution; Electrolyzing the ionized organics to float them on the surface of the water; Removing the injured organics; Adjusting chromaticity by adding activated carbon to the filtrate from which the organic matter is removed; And ozone treatment.

In the livestock wastewater treatment process of the present invention, the metal sample, the acid solution, and the electrolytic flotation device are the basic elements.

The livestock wastewater treatment method according to the present invention effectively decomposes the dissolved substances in the livestock wastewater at room temperature and atmospheric pressure, floats the decomposed ionic materials using a pulse electrolytic floater, and then floats the floated material using a float remover. It goes through a series of processes.

The mechanism of the livestock wastewater treatment according to the present invention is represented by the following scheme.

(Where A is an inorganic sample)

As in Scheme 1, first, a predetermined amount of inorganic sample and acid are added to a predetermined amount of wastewater.

At this time, the acid solution includes a general strong acid, weak acid, specifically hydrochloric acid, nitric acid, sulfuric acid, bromic acid, fluoric acid, iodic acid, boric acid, acetic acid, formic acid, terephthalic acid, maleic acid, urea acid, adipic acid, and the like. .

In addition, the metal sample is preferably highly reactive with acid, and specifically, lithium, calcium, iron, potassium, magnesium, aluminum, nickel, zinc, tin, sodium, or manganese.

At this time, the content of the inorganic sample, such as magnesium to be added may vary depending on the amount of ammonia nitrogen compound contained in the livestock wastewater, for example, 20 ppm relative to 2000 ml livestock wastewater 19% nitrogen compounds.

And, the acid solution is different depending on the content of the inorganic sample, for example, it is preferable that the weight of 80mg per 1.5g. If the acid solution is added in an excessive amount, excessive bubbles and toxic gas may be generated.

In this way, when an inorganic sample is added to the livestock wastewater and an acid solution is added thereto, the ammonia nitrogen compound contained in the livestock wastewater is ionized. Thus, the ionized organic material is subjected to a voltage of 10 V using a pulse electrolytic incubator for 30 minutes. When walked, the materials ionized by the inorganic sample float above the surface of the water.

After removing the floating material by using a float remover, activated carbon is added to the filtrate to remove color, and bleaching and sterilizing by blowing ozone at a rate of 10 cm / s to complete the treatment of livestock wastewater.

At this time, the amount of activated carbon or the amount of ozone added does not have a significant effect in the wastewater treatment, but the preferable amount of activated carbon is 0.5 g parts by weight per 250 ml with respect to the filtrate, and the amount of ozone is 0.05 mg part by weight.

In order to test the effect of the livestock wastewater treatment method according to the present invention was tested as follows.

In a beaker (2,000 ml), 250 ml of livestock wastewater stock solution of a breeding ground of 10,000 heads of pigs was taken, an inorganic sample was added thereto, the mixture was stirred, and an acid was added and then stirred again. Then, after installing the electrolytic flotation device, the voltage was applied and floated for 30 minutes, the suspended solids were removed, the chromaticity was removed with activated carbon, and bleached and sterilized with ozone.

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited by the Examples.

Example 1

250 ml of livestock wastewater (containing 0.02 g / ml of ammonia-based urea urea) was added to a 2,000 ml beaker, diluted four-fold, and then stirred for 1,500 mg of sodium. Then, 15 ml of hydrochloric acid was added to the acid, followed by stirring. . After installing the electrolytic flotation device, the voltage was applied to 10V. After floating for about 30 minutes, suspended solids were removed, chromaticity was removed with activated carbon, and bleached and sterilized with ozone.

Example 2

Livestock wastewater was treated in the same manner as in Example 1 except that 1,000 mg of a metal sample was added and 12 ml of an acid solution was added.

Example 3

Livestock wastewater was treated in the same manner as in Example 1, except that 500 mg of metal sample and 10 ml of acid were added.

Example 4

Livestock wastewater was treated in the same manner as in Example 1 except that 200 mg of a metal sample and 10 ml of an acid solution were added.

Example 5

Livestock wastewater was treated in the same manner as in Example 1, except that 150 mg of a metal sample and 8 ml of an acid solution were added, followed by complete reaction (about 1 hour).

Experimental Example

In some cases, the conventional method processes the livestock waste water according to the embodiment _{Alum ((Al 2 SO 4)} 4 · 18H 2 O) to the amount of dissolved oxygen, the biological oxygen demand of the treated waste water when treated with the livestock waste, chemical Oxygen demand, color and odor were measured and the results are shown in Table 1 below.

medicine Injection volume Measure Removal efficiency (%) DO BOD COD Chromaticity stink Metal sample (mg) + acid solution (ml) 1,500 + 15 70 50 65 80 95 1,000 + 12 73 60 68 90 97 500 + 10 82 64 70 93 98 200 + 10 87 70 77 95 98 150 + 8 95 85 82 97 100 Alum 1,500 41 33 34 20 15 1,000 38 30 25 15 13 500 35 26 18 12 13 200 25 22 17 8 10 150 21 20 15 8 10

From the results of Table 1, when treated with a metal sample and an acid solution as in the present invention and then treated with wastewater through electrolytic flotation, the treatment efficiency of DO, BOD, COD as well as color and odor treatment is high, and a common flocculant is used. It can be seen that the chromaticity, odor, DO, BOD, and COD treatment efficiency are also improved compared to the case of using the treatment.

On the other hand, the content of ammonia nitrogen compounds before the wastewater treatment and the content of ammonia nitrogen compounds after the wastewater treatment were measured by the separation method using the interaction between the combustion method and the gas chromatography using an element analyzer (Carlo Erba). The results (weight%) are shown in Table 2 below. As a control, the flocculant was used as mentioned above.

Example 1 Example 2 Example 3 Example 4 Example 5 Control Ammonia-nitrogen content (% by weight) before treatment 19.90 ± 0.44 19.91 ± 0.44 19.91 ± 0.44 19.91 ± 0.44 19.91 ± 0.44 19.91 ± 0.44 Ammonia nitrogen content after treatment (% by weight) 9.03 ± 0.26 7.89 ± 0.72 6.41 ± 0.35 3.02 ± 0.27 1.02 ± 0.36 18.97 ± 0.58

From the results of Table 2, as shown in the present invention, according to the content of the metal sample and the acid solution, and then control results using the flocculant and the embodiment through the electric flotation, the content of the nitrogen-based compound in the control was not changed but In Example 5, it can be seen that urea is decomposed and processed the most, so that the treatment efficiency is excellent.

As described in detail above, when the metal sample and the acid solution are added to the livestock wastewater according to the present invention, the urea and the nitrogen-based toxic pollutants in the livestock wastewater are ionized and then removed by electrolytic injury. As a result, it is expected to obtain foreign currency from exports due to the import substitution effect of wastewater treatment technology and economic development, which is more innovative than the method used in developed countries. Because it can be used as a whole liquid fertilizer, there is no need to treat separately, there is an advantage that no secondary pollutants are generated. In other words, the present invention can be said to be a completely new livestock wastewater treatment method with non-toxicity, pollution-free, economical in domestic livestock wastewater treatment.

Claims (4)

Adding a metal sample to the toxic organic material containing urea and other nitrogen-based materials, and then ionizing by adding an acid solution; Electrolyzing the ionized organic material to float on the surface of the water; Removing the injured organic material; Adjusting chromaticity by adding activated carbon to the filtrate from which the organic matter is removed; And Inorganic chemical treatment method of livestock wastewater comprising the step of ozone treatment. The method of claim 1, The electrolytic injury is carried out by applying a voltage for 30 minutes at a voltage of 10V by using a pulse electrolytic incubator. The method of claim 1, Inorganic chemical treatment of livestock wastewater, characterized in that the metal sample is used at least one selected from lithium, calcium, iron, potassium, magnesium, aluminum, nickel, zinc, tin, sodium and manganese. The method of claim 1, As the acid solution, at least one selected from hydrochloric acid, nitric acid, sulfuric acid, bromic acid, fluoric acid, iodic acid, boric acid, acetic acid, formic acid, terephthalic acid, maleic acid, ureic acid and adipic acid is used. Chemical treatment.