Treatment method for textile industrial waste water

A technology of textile industry wastewater and treatment method, which is applied in the direction of textile industry wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve problems such as equipment shutdown, replacement of parts, equipment depreciation and wear, and negative effects of treatment processes.

Active Publication Date: 2018-05-29
SUZHOU SUJING ENVIRONMENTAL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0035] In the printing and dyeing wastewater treatment method and system of the invention, since the nanofiltration concentrated water is processed by the nanofiltration concentrated water treatment unit and then returned to the nanofiltration unit for processing, it will inevitably cause the infinite accumulation of salt here, and the salt Accumulation in the same position has buried hidden dangers for the long-term stable operation of the equipment. On the one hand, the infinite accumulation of salt will inevitably cause frequent shutdowns and replacement of equipment, which will affect the continuous treatment of wastewater, an

Method used

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  • Treatment method for textile industrial waste water

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Effect test

Embodiment 1

[0090] Sampling and analysis of wastewater from a textile industry shows that the basic properties of the wastewater are: ammonia nitrogen: 100-160mg / L, total nitrogen: 120-180mg / L, COD cr : 2000~2600mg / L, Chromaticity: 200~400 times, PH: 6~8, SS: 120~400mg / L, Conductivity: 1500~2000us / cm, Wastewater generation: 240m 3 / d.

[0091] Follow the steps below to treat the waste water:

[0092] (1), adjust the pH value: pump the textile wastewater in the wastewater adjustment tank into the pH adjustment tank with a lift pump, then adjust the pH value of the wastewater to 8 according to the water quality characteristics of the wastewater;

[0093] (2), coagulation and air flotation treatment: after the waste water is treated in the step (1), it first enters the coagulation reaction tank, and a 10% polyaluminum chloride aqueous solution is added, and the dosage is 600 mg / L , stirred and reacted for 15 minutes, then entered the flocculation reaction tank, and added a polyacrylamide a...

Embodiment 2

[0107] Sampling and analysis of wastewater from a textile industry shows that the basic properties of the wastewater are: ammonia nitrogen: 80-130mg / L, total nitrogen: 90-150mg / L, COD cr : 1600~2200mg / L, chromaticity: 160~360 times, PH: 7~8, SS: 160~430mg / L, conductivity: 2500~4000us / cm, waste water generation: 1200m 3 / d.

[0108] Follow the steps below to treat the waste water:

[0109] (1), adjust the pH value: pump the textile wastewater in the wastewater adjustment tank into the pH adjustment tank with a lift pump, then adjust the pH value of the wastewater to 8 according to the water quality characteristics of the wastewater;

[0110] (2), coagulation and air flotation treatment: after the waste water is treated in the step (1), it first enters the coagulation reaction tank, and adds a polyaluminum chloride aqueous solution with a concentration of 12%, and the dosage is 700 mg / L , stirred and reacted for 20 minutes, then entered the flocculation reaction tank, and adde...

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Abstract

The invention discloses a treatment method for textile industrial waste water. The treatment method for textile industrial waste water comprises the following steps: (1) regulating a pH value; (2) carrying out coagulation air floatation treatment on the waste water obtained in step (1); (3) carrying out primary oxygen deficit/primary aerobiotic biological treatment on the waste water obtained by treatment in step (2); (4) carrying out secondary oxygen deficit/secondary aerobiotic biological treatment on the waste water obtained by treatment in step (3); (5) carrying out reverse osmosis treatment on nano-filtration produced water obtained by treatment in step (5), and enabling reverse osmosis concentrated water to enter a primary anoxic pond; (7) carrying out DTRO disc tube type reverse osmosis treatment on nano-filtration concentrated water obtained by treatment of step (5); and (8) carrying out evaporation treatment on the DTRO disc tube type reverse osmosis concentrated water obtained by treatment in step (7). By the method, the problem of dispersed treatment of salt in the waste water is solved, the treatment efficiency and effect are improved, the treatment cost is reduced, andzero emission of treatment of the waste water is further implemented.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment method for textile industrial wastewater. Background technique [0002] The textile industry has a large amount of wastewater discharge, deep color, high content of refractory organic matter, and unstable water quality, which are the focus and difficulty of wastewater treatment industry research. Pollutants in textile industrial wastewater are mainly dirt, salt, oil and grease on textile fibers such as cotton and wool, as well as various sizing, dyes, surfactants, auxiliaries, acids and alkalis added during processing. etc. These are serious sources of pollution. At present, the treatment methods of textile industry wastewater include physical, chemical and biological methods. Because this type of wastewater contains a large amount of organic matter, dyes, pigments, and toxic substances that are not easy to biodegrade or have a very slow bio...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/30
CPCC02F1/001C02F1/048C02F1/24C02F1/441C02F1/442C02F1/5236C02F1/56C02F1/66C02F3/30C02F9/00C02F2103/30C02F2301/08
Inventor 李宇庆马楫余杰张磊陆汛
Owner SUZHOU SUJING ENVIRONMENTAL ENG
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