CN107162334A - A kind of method for removing organic matter in micro-polluted source water that post is filtered based on biological cleaning - Google Patents

Abstract

A method for removing organic matter in slightly polluted water source water based on a biological purification filter column, a method for removing organic matter in slightly polluted water source water, the present invention is to solve the low removal rate of the existing method for removing organic matter in slightly polluted water source water technical problems. The method includes: 1. construction of a biological purification filter column system; 2. cultivating heterotrophic microorganisms for degrading organic matter and manganese oxidizing bacteria that catalyze manganese oxidation in the biological purification filter column; 3. operation of the biological purification filter column system. The invention has high removal efficiency when removing organic matter in slightly polluted water source water, realizes efficient and stable removal of organic matter in water source water, and the organic matter in effluent water is obviously lower than the national drinking water standard, which is beneficial to practical engineering application.

Description

A method for removing organic matter in slightly polluted water source water based on biological purification filter column

technical field

The invention relates to a method for removing organic matter in slightly polluted water source water, belonging to the field of drinking water treatment.

Background technique

Water is an indispensable resource in human survival and production activities. With the rapid growth of population, the rapid development of economy and the continuous improvement of people's living standards, the human demand for water resources is gradually increasing. However, with the use of a large amount of pesticides and fertilizers in the process of industrial and agricultural production, and the discharge of domestic sewage and industrial "three wastes" without strict treatment, organic pollutants detected in water source water are increasing, including pesticides, chemical raw materials, drugs, Personal care products and endocrine disruptors, etc. Among them, although the concentration of many pollutants is low, they are difficult to biodegrade and extremely harmful. In the "Drinking Water Hygienic Standards" promulgated by the Ministry of Health in 2006, the toxicological indicators of organic pollution have increased to 53 items. How to efficiently remove trace organic pollutants in slightly polluted source water has become a hot issue in current drinking water treatment.

The existing biological method for removing organic matter in slightly polluted source water has simple technological process, stable operation, low investment cost and small floor area, but the removal effect is not ideal.

Contents of the invention

The present invention aims to solve the technical problem of low removal rate of the existing biological method for removing organic matter in slightly polluted water source water, and provides a method for removing organic matter in slightly polluted water source water based on a biological purification filter column.

The method for removing organic matter in slightly polluted water source water based on biological purification filter column of the present invention is carried out according to the following steps:

1. Construction of biological purification filter column system: The biological purification filter column system is composed of filter column, first water tank, second water tank, third water tank, first water pump, second water pump, third water pump and mixer. The lower part of the bottom is a support layer, and above the support layer is a filter material layer, an overflow port is set at the upper end of the filter column 1, a water outlet is set at the bottom of the filter column, and a sampling port is set at the side wall of the filter column; the first The first water pump is set on the pipeline between the water tank and the mixer, the second water pump is set on the pipeline between the second water tank and the mixer, the third water pump is set on the pipeline between the third water tank and the mixer, and the mixer is set on top of filter column;

Second, the start-up of the biological purification filter column system:

a. Inject tap water into the first water tank, and inject river water inoculated with heterotrophic bacteria into the second water tank; inject tap water and river water inoculated with heterotrophic bacteria in a volume ratio of (5-6): 1 through the first water pump and the second water pump Mix in the mixer, flow into the filter column after mixing, control the filtration rate to 4-5m/h, and finally discharge from the water outlet at the bottom of the filter column 1; when the removal rate of COD in the effluent is greater than 40%, the first stage is completed start up;

B, the first water tank is injected with running water, the second water tank is injected with the river water inoculated with manganese oxidizing bacteria, the third water tank is injected with manganese sulfate solution, and the tap water and the river water inoculated with manganese oxidizing bacteria are injected by the first water pump, the second water pump and the third water pump and manganese sulfate solution into the mixer to mix, wherein the concentration of manganese sulfate solution in the mixed solution is 0.5-0.6 mg/L, the mixed solution flows into the filter column, and the filtration rate is controlled to be 4-5m/h, and finally from the bottom of the filter column Discharge from the water outlet; when the removal rate of manganese ions is greater than 90%, increase the concentration of manganese sulfate solution in the mixed solution to 1.0-1.1mg/L, and then run until the removal rate of manganese ions is greater than 90%, then add the mixed solution Increase the concentration of manganese sulfate solution in the medium to 1.8-2mg/L, and then run until the removal rate of manganese ions is greater than 90%, and complete the start-up of the second stage;

3. Operation of biological purification filter column system:

The slightly polluted source water to be treated in the first water tank is passed into the mixer through the first water pump, the second water pump and the third water pump stop working, the water flows into the filter column, and the filtration rate is controlled to be 4-5m/h, and finally It is discharged from the water outlet at the bottom of the filter column to complete the treatment of slightly polluted source water.

The method of the invention realizes the catalytic oxidation of organic matter by biological manganese oxide and the biological oxidation of organic matter by heterotrophic bacteria in the biological purification filter column, thereby improving the removal effect of organic matter. When the biological purification filter column is used to remove manganese in the water body, the divalent manganese in the water is adsorbed by the biomanganese oxide on the filter material and oxidized into high-priced biomanganese oxide. The particle size of the bio-manganese oxide is at the nanometer level, and it has a large specific surface area. It is an oxidizing component with strong oxidizing ability, and it plays an important role in the migration and transformation of trace organic matter. After the biomanganese oxide catalyzes the oxidation of organic matter, it is reduced to manganese ions, and the manganese ions produced can still be oxidized to manganese oxides by manganese oxidizing bacteria, so that organic matter can be continuously and effectively degraded, and the oxidation products of organic matter can also be degraded. Microbial utilization for further metabolic degradation. Therefore, when the bio-purification filter column is used to remove organic matter and manganese simultaneously, a large amount of bio-manganese oxides will be generated on the filter material, and the catalytic oxidation ability of these bio-manganese oxides will be fully utilized, combined with the biological purification of organic matter by microorganisms in the bio-purification filter column. Oxidation will greatly improve the removal effect of organic matter in slightly polluted water source water.

The invention has high removal efficiency when removing organic matter in slightly polluted water source water, realizes efficient and stable removal of organic matter in water source water, and the organic matter in effluent water is obviously lower than the national drinking water standard, which is beneficial to practical engineering application.

Description of drawings

Fig. 1 is a schematic diagram of the biological purification filter column system of the present invention; the construction of the biological purification filter column system: the biological purification filter column system consists of 1 for the filter column, 2 for the first water tank, 3 for the second water tank, and 4 for the third water tank , 5 is the first water pump, 6 is the second water pump, 7 is the third water pump, 8 is the mixer, 9 is the flow meter; 1-1 is the support layer 1-1, filter 1-2 is the material layer, 1- 3 is the overflow port, 1-4 is the water outlet, 1-5 is the sampling port;

Fig. 2 is the removal effect diagram of the organic matter in the first start-up stage in test 1;

Figure 3 is a diagram of the removal effect of organic matter in the second start-up stage in Experiment 1

Fig. 4 is a graph showing the removal effect of manganese in the second start-up stage in Experiment 1.

detailed description

Specific embodiment one: the method for removing organic matter in micro-polluted water source water based on the biological purification filter column of the present embodiment is carried out according to the following steps:

1. Construction of the biological purification filter column system: the biological purification filter column system consists of filter column 1, first water tank 2, second water tank 3, third water tank 4, first water pump 5, second water pump 6, third water pump 7 and The mixer 8 is composed of a support layer 1-1 in the lower part of the filter column 1, and a filter material layer 1-2 above the support layer. An overflow port 1-3 is set at the upper end of the filter column 1, and Water outlet 1-4 is set at the bottom of 1, sampling port 1-5 is set on the side wall of filter column 1; first water pump 5 is set on the pipeline between first water tank 2 and mixer 8, second water tank 3 and mixer The second water pump 6 is arranged on the pipeline between 8, the third water pump 7 is arranged on the pipeline between the third water tank 4 and the mixer 8, and the mixer 8 is arranged on the top of the filter column 1;

Second, the start-up of the biological purification filter column system:

A, the first water tank 2 is injected with tap water, the second water tank 3 is injected with the river water inoculated with heterotrophic bacteria; by the first water pump 5 and the second water pump 6, the river water with tap water and heterotrophic bacteria inoculated is (5～6) by volume ): 1 is injected into the mixer 8 for mixing, and after mixing, it flows into the filter column 1, and the filtration rate is controlled to be 4-5m/h, and finally discharged from the water outlet 1-4 at the bottom of the filter column 1; when the removal rate of COD in the effluent is greater than After 40%, the launch of the first phase is completed;

B, the first water tank 2 is injected with tap water, the second water tank 3 is injected with the river water inoculated with manganese oxidizing bacteria, the third water tank 4 is injected with manganese sulfate solution, and tap water, The river water inoculated with manganese oxidizing bacteria and the manganese sulfate solution are injected into the mixer 8 and mixed, the concentration of manganese sulfate in the obtained mixed solution is 0.5-0.6mg/L, the mixed solution flows into the filter column 1, and the filtration rate is controlled to be 4-5m/L h, finally discharged from the water outlet 1-4 at the bottom of the filter column 1; when the removal rate of manganese ions is greater than 90%, the concentration of manganese sulfate in the mixed solution is increased to 1.0～1.1mg/L, and then run to the manganese ion After the removal rate is greater than 90%, increase the concentration of manganese sulfate in the mixture to 1.8-2mg/L, and then run until the removal rate of manganese ions is greater than 90%, and complete the start of the second stage;

3. Operation of biological purification filter column system:

The slightly polluted source water to be treated is injected into the first water tank 2, and the slightly polluted source water to be treated in the first water tank 2 is passed into the mixer through the first water pump 5, and the second water pump 6 and the third water pump 7 are stopped Work, water flows into the filter column 1, control the filtration rate to 4-5m/h, and finally discharge from the water outlet 1-4 at the bottom of the filter column 1, and complete the treatment of slightly polluted source water.

Embodiment 2: The difference between this embodiment and Embodiment 1 is that in Step 1, the supporting layer 1-1 is supplemented by stone grains with a particle size of 30-50 mm; other aspects are the same as Embodiment 1.

Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that the filter material layer 1-2 in step 1 is quartz sand, and the particle size of the quartz sand is 10-20 mm; the others are the same as Embodiment 1 or 2.

Embodiment 4: This embodiment differs from Embodiments 1 to 3 in that the thickness of the filter material layer 1-2 in step 1 is 1.5-2 m; the others are the same as Embodiments 1 to 3.

Specific embodiment five: the difference between this embodiment and one of specific embodiments one to four is that the filtration rate in step two is 4.5m/h; others are the same as one of specific embodiments one to four.

Specific embodiment six: the difference between this embodiment and one of specific embodiments one to five is that the filtration rate in step three is 4.5m/h; others are the same as one of specific embodiments one to five.

Verify beneficial effect of the present invention with following test:

Test 1: The method for removing organic matter in slightly polluted water source water based on biological purification filter column in this test is carried out according to the following steps:

1. Construction of the biological purification filter column system: the biological purification filter column system consists of filter column 1, first water tank 2, second water tank 3, third water tank 4, first water pump 5, second water pump 6, third water pump 7 and Mixer 8, the lower part of the filter column 1 is the support layer 1-1, the support layer 1-1 is supplemented by stone particles with a particle size of 30-50mm, and the filter material layer 1-1 is above the support layer. 2. The filter material layer 1-2 is quartz sand with a particle size of 10-20mm, and its thickness is 1.5m; an overflow port 1-3 is set at the upper end of the filter column 1, and a water outlet 1-3 is set at the bottom of the filter column 1. 4. Sampling ports 1-5 are set on the side wall of the filter column 1; the first water pump 5 is set on the pipeline between the first water tank 2 and the mixer 8, and the second water pump 5 is set on the pipeline between the second water tank 3 and the mixer 8. Two water pumps 6, a third water pump 7 is arranged on the pipeline between the third water tank 4 and the mixer 8, and the mixer 8 is arranged on the top of the filter column 1;

Second, the start-up of the biological purification filter column system:

a. Inject tap water into the first water tank 2, and inject the river water inoculated with heterotrophic bacteria into the second water tank 3; inject the tap water and the river water inoculated with heterotrophic bacteria at a volume ratio of 5:1 through the first water pump 5 and the second water pump 6 Mix in the mixer 8, flow into the filter column 1 after mixing, control the filtration rate to 4m/h, and finally discharge from the water outlet 1-4 at the bottom of the filter column 1; when the removal rate of COD in the effluent is greater than 40%, complete the second One-stage start; the removal effect of organic matter in this process is shown in Figure 2;

B, the first water tank 2 is injected with tap water, the second water tank 3 is injected with the river water inoculated with manganese oxidizing bacteria, the third water tank 4 is injected with manganese sulfate solution, and tap water, The river water inoculated with manganese oxidizing bacteria and the manganese sulfate solution are injected into mixer 8 and mixed, and the concentration of manganese sulfate in the obtained mixed solution is 0.5mg/L, and the mixed solution flows into the filter column 1, and the control filtration rate is 4m/h, and finally from The water outlet 1-4 at the bottom of filter column 1 is discharged; when the removal rate of manganese ions is greater than 90%, the concentration of manganese sulfate in the mixed solution is increased to 1.0mg/L, and then run until the removal rate of manganese ions is greater than 90%. , then increase the concentration of manganese sulfate in the mixed solution to 2mg/L, and then operate until the removal rate of manganese ions is greater than 90%, and complete the start-up of the second stage; The removal effect is shown in Figure 4.

3. Operation of biological purification filter column system:

The slightly polluted source water to be treated is injected into the first water tank 2, and then the slightly polluted source water to be treated in the first water tank 2 is passed into the mixer by the first water pump 5, wherein the COD concentration of the slightly polluted source water is 5 ~ 8mg/L, the second water pump 6 and the third water pump 7 stop working, the water flows into the filter column 1, the control filtration rate is 4m/h, and finally it is discharged from the water outlet 1-4 at the bottom of the filter column 1, and the water The concentration of organic matter is gradually reduced to 2.8mg/L～2.6mg/L, and the treatment of slightly polluted source water is completed.

For slightly polluted source water, the biological purification filter column system in this test has a removal rate of 44% to 67% of organic matter. The method of this test has realized the efficient and stable removal of organic matter in slightly polluted source water.

Claims (6)

1. a kind of method for removing organic matter in micro-polluted source water that post is filtered based on biological cleaning, it is characterised in that this method is pressed Following steps are carried out：

First, building for column system is filtered in biological cleaning：Biological cleaning filters column system by filter post (1), the first water tank (2), the second water tank (3) in, three-tank (4), the first water pump (5), the second water pump (6), the 3rd water pump (7) and blender (8) composition, filter post (1) Bottom be supporting layer (1-1), on supporting layer be filter material layer (1-2), filter post (1) upper end set overfall (1-3), Delivery port (1-4) is set in the bottom of filter post (1), sample tap (1-5) is set in the side wall of filter post (1)；First water tank (2) is with mixing Set on pipeline between clutch (8) and set second on the first water pump (5), the pipeline between the second water tank (3) and blender (8) 3rd water pump (7) is set on water pump (6), the pipeline between three-tank (4) and blender (8), and blender (8) is arranged on filter post (1) top；

2nd, the startup of column system is filtered in biological cleaning：

A, the river that injection running water in the first water tank (2), the second water tank (3) injection are inoculated with to heterotroph；Pass through the first water pump (5) and the second water pump (6) by running water, be inoculated with heterotroph river by volume be (5~6)：Mixed in 1 injecting mixer (8) Close, flowed into after mixing in filter post (1), it is 4~5m/h to control filtering velocity, finally from delivery port (1-4) discharge of filter post (1) bottom； After the clearance of COD in water outlet is more than 40%, the startup of first stage is completed；

B, the river that injection running water in the first water tank (2), the second water tank (3) injection are inoculated with to manganese oxidizing bacteria, three-tank (4) Inject manganese sulfate solution, by the first water pump (5), the second water pump (6) and the 3rd water pump (7) by running water, be inoculated with manganese oxidizing bacteria River and manganese sulfate solution injecting mixer (8) in mix, the concentration of manganese sulfate is 0.5~0.6mg/ in obtained mixed liquor L, mixed liquor is flowed into filter post (1), and it is 4~5m/h to control filtering velocity, finally from delivery port (1-4) discharge of filter post (1) bottom；When After the clearance of manganese ion is more than 90%, the concentration of manganese sulfate in mixed liquor is improved to 1.0~1.1mg/L, reruned to manganese After the clearance of ion is more than 90%, then the concentration of manganese sulfate in mixed liquor improved to 1.8~2mg/L, rerun to manganese from The clearance of son is more than 90%, completes the startup of second stage；

3rd, the operation of column system is filtered in biological cleaning：

Pending micro-polluted source water is injected in the first water tank (2), by the first water pump (5) by the first water tank (2) Pending micro-polluted source water is passed through blender, and the second water pump (6) and the 3rd water pump (7) are stopped, and water is flowed into filter post (1) in, it is 4~5m/h to control filtering velocity, finally from delivery port (1-4) discharge of filter post (1) bottom, completes micro-polluted source water Processing.

2. a kind of side for removing organic matter in micro-polluted source water that post is filtered based on biological cleaning according to claim 1 Method, it is characterised in that supporting layer (1-1) is auxiliary into stone grain particle diameter is 30~50mm by stone grain in step one.

3. organic matter in a kind of removal micro-polluted source water that post is filtered based on biological cleaning according to claim 1 or 2 Method, it is characterised in that filter material layer (1-2) is quartz sand in step one, quartz sand particle size is 10~20mm.

4. organic matter in a kind of removal micro-polluted source water that post is filtered based on biological cleaning according to claim 1 or 2 Method, it is characterised in that filter material layer (1-2) thickness is 1.5~2m in step one.

5. organic matter in a kind of removal micro-polluted source water that post is filtered based on biological cleaning according to claim 1 or 2 Method, it is characterised in that filtering velocity is 4.5m/h in step 2.

6. organic matter in a kind of removal micro-polluted source water that post is filtered based on biological cleaning according to claim 1 or 2 Method, it is characterised in that filtering velocity is 4.5m/h in step 3.