Reclaiming treatment method for hydraulic loom waste water

Abstract

The invention provides a method for treating and reutilizing hydraulic loom wastewater, comprising the following steps of: (1) lifting the adjusted wastewater to a reaction tank, performing coagulation and floatation, feeding the separated sludge into a sludge concentration tank, and feeding the rest parts into a biological tank; (2) performing biological treatment and sedimentation of wastewater, feeding into a horizontal sedimentation tank together with supplementing water, adding chemicals, adjusting pH value, coagulating, settling, and disinfecting the effluent into a clean water tank; (3) filtering the disinfected effluent with a mechanical filter, and performing sodium ion exchange; and (4) delivering the treated process water into hydraulic looms in a workshop. The inventive method avoids harmful substances entering recycled water in chemicals addition and ion exchange steps by using wastewater treatment and recycled water reusing combined techniques, so as to improve recycled water treatment effect and process water quality, thereby improving recycled water reuse ratio.

Description

technical field

[0001] The invention relates to a method for treating and recycling textile wastewater, in particular to a method for treating and recycling wastewater from a water jet loom. Background technique

[0002] The textile industry is one of the traditional pillar industries in my country. According to the industry, it is mainly divided into textile industry, printing and dyeing industry, chemical fiber manufacturing industry, garment industry and textile special equipment manufacturing industry. The water jet loom is a kind of machine commonly used in the textile industry. During the working process, a certain amount of clean water is needed for jet driving. The daily water consumption of each loom is 1-2 tons, and the discharged waste water mainly contains grease, Colloids, fine suspended particles, chemical slurry, color, microorganisms, heavy metals and organic matter, etc. Generally, the concentration of COD in wastewater is 150-500mg / l, and its biodegradabil...

Examples

Embodiment 1

[0030] Referring to Figure 1, after the water jet loom wastewater is regulated, it is lifted to the reaction tank by the lift pump, where it is treated with dosing coagulation and pressurized dissolved air flotation. The wastewater coagulation dosing is 9.5~10% PAC, and the dosage is 0.3~0.35‰ of the wastewater volume. Air flotation pool. In the air flotation tank, chemical slurry such as PVA, surfactants and oils in the wastewater are removed, the separated sludge enters the sludge thickening tank, and the remaining part enters the biological tank for treatment. After coagulation reaction + pressurized dissolved air flotation, the effluent COD removal rate is over 75%, the turbidity removal rate is over 85%, Cl -The concentration increases by about 10%. Biological treatment is carried out on the remaining organic matter in the wastewater in the biological tank. After the sedimentation mud water is separated, the sludge enters the sludge concentration tank, the effluent ente...

Embodiment 2

[0034] The determination of the concentration and dosage of main medicaments is shown in the following groups:

[0035] Table 2-1 The relationship between the concentration and dosage of chemicals and water quality

[0036] Group

do not

Aluminum sulfate

concentration

Aluminum sulfate

dosage

PAM

concentration

PAM

dosage

COD

remove

Turbidity

remove

pH

Reduced amount

2.1

6.0％

0.5‰

1.0‰

0.20‰

85％

75％

3

2.2

6.5％

0.4‰

1.5‰

0.16‰

85％

80％

2

2.3

7.0％

0.3‰

2.0‰

0.12‰

85％

85％

1.5

2.4

7.5％

0.2‰

2.5‰

0.08‰

85％

98％

1

2.5

8.0％

0.15‰

3.0‰

0.04‰

80％

97％

0.8

2.6

8.5％

0.10‰

3.5‰

0.04‰

74％

70％

0.6

2.7 ...

Embodiment 3

[0042] The determination of the concentration and dosage of main medicaments is shown in the following groups:

[0043] Table 3-1 The relationship between the concentration and dosage of chemicals and water quality

[0044] group

Aluminum sulfate concentration

Aluminum sulfate dosage

Carbide slag concentration

Calcium carbide slag dosage

Turbidity removal

pH

3.1

6.0％

0.5‰

1.0％

3‰

50％

7.3

3.2

6.5％

0.4‰

1.5％

2‰

50％

7.2

3.3

7.0％

0.3‰

1.5％

1‰

50％

7.0

3.4

7.5％

0.2‰

2.0％

0.8‰

55％

7.5

3.5

8.0％

0.15‰

2.5％

0.3‰

50％

7.1

3.6

8.5％

0.10‰

3.0％

0.1‰

40％

6.8

3.7

9.0％

0.10‰

4.0％

0.05‰

45％

6.6

[0045] Referring to Figure 1, image 3 , the advect...

technical field

[0001] The invention relates to a method for treating and recycling textile wastewater, in particular to a method for treating and recycling wastewater from a water jet loom. Background technique

[0002] The textile industry is one of the traditional pillar industries in my country. According to the industry, it is mainly divided into textile industry, printing and dyeing industry, chemical fiber manufacturing industry, garment industry and textile special equipment manufacturing industry. The water jet loom is a kind of machine commonly used in the textile industry. During the working process, a certain amount of clean water is needed for jet driving. The daily water consumption of each loom is 1-2 tons, and the discharged waste water mainly contains grease, Colloids, fine suspended particles, chemical slurry, color, microorganisms, heavy metals and organic matter, etc. Generally, the concentration of COD in wastewater is 150-500mg / l, and its biodegradabil...

Examples

Embodiment 1

[0030] Referring to Figure 1, after the water jet loom wastewater is regulated, it is lifted to the reaction tank by the lift pump, where it is treated with dosing coagulation and pressurized dissolved air flotation. The wastewater coagulation dosing is 9.5~10% PAC, and the dosage is 0.3~0.35‰ of the wastewater volume. Air flotation pool. In the air flotation tank, chemical slurry such as PVA, surfactants and oils in the wastewater are removed, the separated sludge enters the sludge thickening tank, and the remaining part enters the biological tank for treatment. After coagulation reaction + pressurized dissolved air flotation, the effluent COD removal rate is over 75%, the turbidity removal rate is over 85%, Cl -The concentration increases by about 10%. Biological treatment is carried out on the remaining organic matter in the wastewater in the biological tank. After the sedimentation mud water is separated, the sludge enters the sludge concentration tank, the effluent ente...

Embodiment 2

[0034] The determination of the concentration and dosage of main medicaments is shown in the following groups:

[0035] Table 2-1 The relationship between the concentration and dosage of chemicals and water quality

[0036] Group

do not

Aluminum sulfate

concentration

Aluminum sulfate

dosage

PAM

concentration

PAM

dosage

COD

remove

Turbidity

remove

pH

Reduced amount

2.1

6.0％

0.5‰

1.0‰

0.20‰

85％

75％

3

2.2

6.5％

0.4‰

1.5‰

0.16‰

85％

80％

2

2.3

7.0％

0.3‰

2.0‰

0.12‰

85％

85％

1.5

2.4

7.5％

0.2‰

2.5‰

0.08‰

85％

98％

1

2.5

8.0％

0.15‰

3.0‰

0.04‰

80％

97％

0.8

2.6

8.5％

0.10‰

3.5‰

0.04‰

74％

70％

0.6

2.7 ...

Embodiment 3

[0042] The determination of the concentration and dosage of main medicaments is shown in the following groups:

[0043] Table 3-1 The relationship between the concentration and dosage of chemicals and water quality

[0044] group

Aluminum sulfate concentration

Aluminum sulfate dosage

Carbide slag concentration

Calcium carbide slag dosage

Turbidity removal

pH

3.1

6.0％

0.5‰

1.0％

3‰

50％

7.3

3.2

6.5％

0.4‰

1.5％

2‰

50％

7.2

3.3

7.0％

0.3‰

1.5％

1‰

50％

7.0

3.4

7.5％

0.2‰

2.0％

0.8‰

55％

7.5

3.5

8.0％

0.15‰

2.5％

0.3‰

50％

7.1

3.6

8.5％

0.10‰

3.0％

0.1‰

40％

6.8

3.7

9.0％

0.10‰

4.0％

0.05‰

45％

6.6

[0045] Referring to Figure 1, image 3 , the advect...

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