阅读说明：本技术 一种用于测试有机高盐工业废水活性炭吸附能力的方法 (Method for testing adsorption capacity of activated carbon in organic high-salt industrial wastewater ) 是由 王翼潇 周珉 张利华 于 2020-06-02 设计创作，主要内容包括：本发明公开了一种用于测试有机高盐工业废水活性炭吸附能力的方法,包括如下步骤：S1、排除空气：调节水流方向为活性炭层析柱上进下出,流通脱盐水,以赶出使用装置内残余的空气；S2、清洗：在S1步骤中的整套使用装置内没有气泡存在后,调节水流方向为活性炭层析柱下进上出,流通脱盐水清洗柱体；S3、润洗、收集水样：在S2步骤结束后,将脱盐水更换为高盐水样,以400～700转/分钟的转速搅拌,水流方向不变,润洗柱体持续；润洗结束后,根据停留时间收集出水水样；其中,所述活性炭层析柱中的水样的停留时间为0.4～1.5小时。本发明方法可以满足高盐分有机工业废水的活性炭工艺实验模拟。(The invention discloses a method for testing the adsorption capacity of active carbon in organic high-salt industrial wastewater, which comprises the following steps: s1, air removal: adjusting the water flow direction to allow the activated carbon chromatographic column to flow in and out, and circulating desalted water to remove residual air in the using device; s2, cleaning: after no air bubbles exist in the whole set of using device in the step S1, adjusting the water flow direction to be that the activated carbon chromatographic column enters from the lower part and goes out from the upper part, and circulating desalted water to clean the column body; s3, rinsing and collecting a water sample: after the step S2 is finished, replacing desalted water with a high-salinity water sample, stirring at a rotating speed of 400-700 rpm, keeping the water flow direction unchanged, and continuously rinsing the column; after the rinsing is finished, collecting an effluent water sample according to the retention time; wherein the retention time of the water sample in the activated carbon chromatographic column is 0.4-1.5 hours. The method can meet the activated carbon process experimental simulation of the high-salinity organic industrial wastewater.)

1. A method for testing the adsorption capacity of activated carbon in organic high-salt industrial wastewater is characterized by comprising the following steps:

s1, air removal: adjusting the water flow direction to allow the activated carbon chromatographic column to flow in and out, and circulating desalted water to remove residual air in the using device;

s2, cleaning: adjusting the water flow direction to enter and exit from the lower part of the activated carbon chromatographic column after no air bubbles exist in the using device in the step S1, and circulating desalted water to clean the column;

s3, rinsing and collecting a water sample: after the step S2 is finished, replacing desalted water with a high-salinity water sample, stirring at a rotating speed of 400-700 rpm, keeping the water flow direction unchanged, and rinsing the column; after the rinsing is finished, collecting an effluent water sample according to the retention time;

wherein the retention time of the water sample in the activated carbon chromatographic column is 0.4-1.5 hours.

2. The method for testing the adsorption capacity of the activated carbon in the organic high-salt industrial wastewater according to claim 1, wherein in the method, the water flow is regulated by a peristaltic pump, and the inner diameter of a tube of the peristaltic pump is 1.4-2.0 mm; the inner diameter can guarantee the requirement of most inflow in this scope, and length can be controlled in reasonable scope, avoids because the high salt waste water crystallization that the pump line overlength leads to blocks up the problem.

3. The method for testing the adsorption capacity of the activated carbon for the organic high-salt industrial wastewater according to claim 1, wherein the mass of the activated carbon filled in the activated carbon chromatographic column is 20-40 g.

4. The method for testing the adsorption capacity of the activated carbon for the organic high-salt industrial wastewater according to claim 1 or 3, wherein the inner diameter of the activated carbon chromatographic column is 1.6 cm; the condition in the chromatographic column is conveniently observed, and the problem that the height precision is insufficient due to too wide column body is solved, so that the flow calculation of the peristaltic pump is influenced.

5. The method for testing the adsorption capacity of the activated carbon in the organic high-salt industrial wastewater according to claim 1 or 2, wherein the materials of the pipelines used in the method are all pure transparent materials; so that the bubble position can be clearly observed in the test process, and the flow error caused by the bubble position is avoided.

6. The method for testing the adsorption capacity of the activated carbon in the organic high-salt industrial wastewater according to claim 1, wherein the using device used in the method is a seamless connection so as to ensure that a sample feeding process is in a sealed state.

7. The method for testing the adsorption capacity of the activated carbon in the organic high-salt industrial wastewater according to claim 1 or 6, wherein the using device comprises an activated carbon chromatographic column, a peristaltic pump, a sample outlet bottle, a sample inlet bottle and a magnetic stirrer.

8. The method for testing the adsorption capacity of the activated carbon in the organic high-salt industrial wastewater according to claim 7, wherein two ends of the activated carbon chromatographic column are connected with an extremely thin tube; the superfine tube comprises a sample inlet tube and a sample outlet tube; the active carbon chromatographic column is in seamless connection with a peristaltic pump pipe of the peristaltic pump through the sample inlet pipe; the active carbon chromatographic column is connected with the sample outlet bottle through the sample outlet pipe.

9. The method for testing the adsorption capacity of the activated carbon for organic high-salt industrial wastewater according to any one of claims 1, 3 or 8, wherein the packing of the activated carbon in the activated carbon chromatography column comprises the following steps: filling the activated carbon into the activated carbon chromatographic column, and repeatedly reversing the activated carbon chromatographic column for a plurality of times to ensure that no air bubbles exist in the activated carbon chromatographic column; and (4) standing for 24 hours, observing again, and if bubbles still exist in the chromatographic column, repeating the steps to remove the bubbles until no bubbles exist in the activated carbon chromatographic column.

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a method for testing the adsorption capacity of active carbon in organic high-salt industrial wastewater.

Background

Sewage treatment is one of the main contents in the field of environmental protection. Among them, the activated carbon technology is widely used in wastewater that is difficult to be treated by activated sludge, and the common problem of this part of wastewater is generally high salinity or contains highly toxic organic substances. Since the activation process is a microscopic process, i.e., the surface erosion of a large amount of molecular carbides is a point-like erosion, the surface of the activated carbon is caused to have countless fine pores. The diameter of micropores on the surface of the activated carbon is mostly between 2 nm and 50nm, and even a small amount of activated carbon has a huge surface area.

An activated carbon Small-Scale Column Test (Rapid Small-Scale Column Test) is widely used, and on the basis of a fixed bed mass transfer model, a factor analysis is utilized to explain the relation between the adsorption efficiency of a Column body and an organic matter. In the experiment, the flow is controlled by a peristaltic pump, the retention time of a water sample in an activated carbon column is kept to be a fixed value (generally 0.4-1.5 h), and the removal efficiency of organic matters in the wastewater is determined according to the CODcr or TOC concentration of a sample of inlet water and outlet water.

The high-salt industrial wastewater is wastewater which is produced by chemical enterprises and contains a large amount of salt ions such as sodium ions, chloride ions, sulfate ions and the like and has higher total soluble solid concentration. The TDS of the part of sewage is often more than 10000mg/L, and the salinity of a water body is overhigh in an activated sludge aerobic biodegradation method commonly used in the field of sewage treatment, so that bacterial cells of the sludge are dehydrated and dead, and the activity is lost, so that the activated carbon technology is required to be used for treatment. Before treatment, the field condition needs to be simulated through experiments, support data is provided, and meanwhile, the matched experimental device is also needed for theoretical research of the related high-salinity wastewater.

In the ordinary chromatographic column experimentation, if use high salt waste water as the test object, can appear and advance the interior crystallization of bottle, lead to easily advancing the jam of appearance pipe, can't continue the experiment.

The Chinese patent CN201910634083.2 discloses a method for treating high-salinity wastewater, which comprises the following steps: s1, adding a section of precipitator into the high-salinity wastewater to be treated so as to precipitate metal ions in the high-salinity wastewater; s2, adding a secondary precipitator to the overflow of the S1 step to precipitate metal ions in the overflow, wherein the secondary precipitator is different from the primary precipitator; s3, evaporating the overflow of the S2 step at low temperature; and S4, naturally evaporating the concentrated solution in the step S3. Compared with the prior art, the method has the advantages of short process flow, low energy consumption, low operation cost, high efficiency and no secondary pollution to the environment. The method is suitable for treatment, but is not suitable for experimental study on the adsorption efficiency of the activated carbon.

The Chinese invention patent CN201510711199.3 discloses a method for purifying high-salinity wastewater by electrostatic adsorption, which utilizes an electrostatic field provided by low voltage generated by a solar panel to treat the high-salinity wastewater, adopts a novel electrode material to improve the treatment efficiency, and has the effects of reducing energy consumption, improving the treatment efficiency, saving energy and reducing cost. The method is suitable for treating wastewater, but does not utilize activated carbon adsorption to carry out experimental study on wastewater treatment.

Therefore, it is urgently needed to provide a method for testing the adsorption capacity of the activated carbon in the organic high-salt industrial wastewater, which is suitable for the activated carbon adsorption of the high-salt industrial wastewater and can meet the activated carbon process experimental simulation of the high-salt organic industrial wastewater.

Disclosure of Invention

The invention aims to provide a method for testing the activated carbon adsorption capacity of organic high-salt industrial wastewater, which is suitable for an activated carbon adsorption experiment of high-salt wastewater, accurately tests wastewater data and provides a basis for subsequent research of wastewater.

In order to achieve the purpose, the invention adopts the following technical scheme.

The invention provides a method for testing the adsorption capacity of active carbon in organic high-salt industrial wastewater, which comprises the following steps:

s1, air removal: adjusting the water flow direction to allow the activated carbon chromatographic column to flow in and out, and circulating desalted water to remove residual air in the using device;

s2, cleaning: after no air bubbles exist in the using device in the step S1, adjusting the water flow direction to enable the activated carbon chromatographic column to enter from the lower part and to go out from the upper part, circulating desalted water to wash the column, and maintaining the desalted water to wash the column;

s3, rinsing and collecting a water sample: after the step S2 is finished, replacing desalted water with a high-salinity water sample, stirring at a rotating speed of 400-700 rpm, keeping the water flow direction unchanged, and rinsing the column; after the rinsing is finished, collecting an effluent water sample according to the retention time;

wherein the retention time of the water sample in the activated carbon chromatographic column is 0.4-1.5 hours.

Furthermore, in the method, the water flow is regulated through a peristaltic pump, and the inner diameter of a peristaltic pump pipe is 1.4-2.0 mm; the inner diameter can guarantee the requirement of most inflow in this scope, and length can be controlled in reasonable scope, avoids because the high salt waste water crystallization that the pump line overlength leads to blocks up the problem.

Further, the mass of the activated carbon filled in the activated carbon chromatographic column is 20-40 g; enough reaction time can be ensured, and the volume of the column body is not too high.

Further, the inner diameter of the activated carbon chromatographic column is 1.6 cm; the condition in the chromatographic column is conveniently observed, and the problem that the height precision is insufficient due to too wide column body is solved, so that the flow calculation of the peristaltic pump is influenced.

Further, the time for washing the cartridge with the desalted water was 1 hour.

Further, the rinsing time was 1 hour.

Furthermore, in the method, all the materials of the used pipelines are pure transparent materials. The bubble position can be observed clearly in the test process, and the flow error caused by the bubble position is avoided.

Further, in the method, the using device is in seamless connection so as to ensure that the sample introduction process is in a sealed state.

Further, the using device comprises: an active carbon chromatographic column, a peristaltic pump, a sample outlet bottle, a sample inlet bottle and a magnetic stirrer.

Furthermore, both ends of the active carbon chromatographic column are connected with a tubule; the superfine tube comprises a sample inlet tube and a sample outlet tube; the active carbon chromatographic column is in seamless connection with a peristaltic pump pipe of the peristaltic pump through the sample inlet pipe; the active carbon chromatographic column is connected with the sample outlet bottle through the sample outlet pipe.

Further, the filling of the activated carbon in the activated carbon chromatographic column comprises the following steps: filling the activated carbon into the activated carbon chromatographic column, and repeatedly reversing the activated carbon chromatographic column for a plurality of times to ensure that no air bubbles exist in the activated carbon chromatographic column; and (4) standing for 24 hours, observing again, and if bubbles still exist in the chromatographic column, repeating the steps to remove the bubbles until no bubbles exist in the activated carbon chromatographic column.

According to the method, a magnetic stirrer is used for maintaining continuous stirring of the sample water, the rotating speed is 400-700 rpm, the experimental effect is prevented from being influenced by crystallization of the water sample, and stirring cannot be influenced by too high or too low rotating speed.

The filling quality of the active carbon, the inner diameter of the tube of the peristaltic pump and the inner diameter of the tube of the chromatographic column specified in the method can ensure that the filling height of the active carbon is appropriate, the flow of the peristaltic pump is convenient to calculate, and the retention time of water samples in different chromatographic columns can be accurately ensured to be consistent.

The method relates to a method for using a chromatography column in a device made of transparent organic glass, which can conveniently observe the conditions in the column at any time in the preparation steps and the experiment process before the experiment and ensure that the water level in the chromatography column is always in a completely filled state.

The peristaltic pump hoses (sample inlet/outlet) used in the device related by the method are all made of transparent rubber materials, so that the trend of bubbles can be observed when the bubbles are removed, and the interference caused by the retention time deviation of a water sample due to the bubbles in the experimental process is avoided.

The invention has the beneficial effects that:

the method is suitable for the activated carbon adsorption experiment of the high-salinity wastewater, accurately tests the wastewater data, and provides a basis for the subsequent research of the wastewater.

In the invention, the sample water sample is continuously stirred during the experiment period, so that the condition of standing crystallization of the high-salinity wastewater can be avoided. According to the method, after the pump pipe of the sample outlet is connected into the sample outlet bottle, the peristaltic pump is adjusted to turn to enable the water flow direction to be that the chromatographic column enters and exits from the top, and residual air in the peristaltic pump pipe and the superfine pipe is removed; when the sample introduction section begins to stably discharge water and no bubble is observed in the peristaltic pump, the peristaltic pump is adjusted to turn to enable the water flow direction to be that the chromatographic column enters and flows out from the bottom so as to ensure that no bubble exists in the whole set of using device to influence the flow.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of the structure of the apparatus used in the present invention.

FIG. 2 is a schematic side view of the device used in the present invention.

FIG. 3 is a schematic view showing the structure of a chromatography column in the apparatus for use in the present invention.

1. A support frame;

2. a butterfly clip;

3. an activated carbon chromatographic column;

4. a support plate;

5. a peristaltic pump;

6. a magnetic stirrer;

7. discharging a sample bottle;

8. a sample feeding bottle;

9. a very thin tube;

10. a peristaltic pump tube;

11. a threaded cap;

12. and (5) filtering the membrane.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.