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1,4-Butanediol Chemical Wastewater Treatment Process

A chemical wastewater and treatment process technology, applied in the field of environmental engineering, can solve problems affecting continuous production, etc., and achieve stable operation performance, low effluent COD, and good treatment effect

Active Publication Date: 2011-12-28
博瑞德环境集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent application 200710077937.9 discloses a treatment method for 1,4-butanediol production wastewater, but this method biochemically treats the influent water (water out of the regulating tank) COD cannot be greater than 1000mg / L, and must be diluted or cause accidents when the concentration is high Pool adjustment, and the process is a batch process, affecting continuous production

Method used

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  • 1,4-Butanediol Chemical Wastewater Treatment Process
  • 1,4-Butanediol Chemical Wastewater Treatment Process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The 1,4-butanediol chemical wastewater first enters the homogeneous distribution tank. The wastewater from the distribution pool is input into the first section of aerobic biological carrier fluidized bed reaction pool + the second section of activated sludge biological oxidation pool + sedimentation tank through the lifting pump, and the volume of the reaction pool is 26L. The outlet flow rate of the wastewater in the homogenization tank is 5L / d, and the COD is 20,231mg / L. Nutrients urea and sodium dihydrogen phosphate are added to the homogenization tank to adjust; and the pH value of the homogenization tank is adjusted to 7. The first section of aerobic biological carrier fluidized bed reaction tank biological carrier (Boride (Nanjing) Purification Technology Co., Ltd. composite modified carrier P15 type) is added 50%, the concentration of microbial sludge in the first section is 10g / L, DO3.5mg / L, hydraulic The stay time is 5 days. The second-stage activated sludge ...

Embodiment 2

[0028] The 1,4-butanediol chemical wastewater first enters the homogenization pool. The wastewater from the homogeneous tank is input into a section of carrier biofilm aerobic tank through the lift pump, and the outlet flow of the wastewater from the homogeneous tank is 60m 3 / d, COD 21,890mg / L, add nutrients urea and disodium hydrogen phosphate to the homogenization pool to adjust, and use alkali to adjust the pH value to 5-7. The first stage of aerobic tank carrier filler (Boride (Nanjing) Purification Technology Co., Ltd. composite modified filler P15 type) added 40%, the first stage of carrier biofilm reaction tank sludge concentration 12g / L, DO2.0mg / L, hydraulic retention The time is 2 days. The second-stage activated sludge tank has a sludge concentration of 4g / L, DO2.5mg / L, and a hydraulic retention time of 3.5 days. The second-stage aerobic effluent enters the secondary settling tank for solid-liquid separation, and the waste water is discharged to the discharge tank...

Embodiment 3

[0031] The 1,4-butanediol process wastewater is first filtered through a grid and then placed in a homogeneous pool. The wastewater from the homogeneous tank is input into a section of carrier biofilm aerobic tank through the lifting pump, and the outlet flow rate of the homogenized tank wastewater is 50m 3 / d, COD 23,538mg / L, add nutrients ammonia water and sodium dihydrogen phosphate to the homogenization pool to adjust; and use inorganic acid or alkali to adjust the pH value of the homogenization pool to 5.0-6.0. The first stage of aerobic tank carrier filler (Boride (Nanjing) Purification Technology Co., Ltd. composite modified filler P15 type) is added with 65%, the sludge concentration of the first stage of carrier biofilm reaction tank is 9g / L, DO3.0mg / L, hydraulic retention The time is 5 days. The second-stage activated sludge tank has a sludge concentration of 3g / L, DO4.0mg / L, and a hydraulic retention time of 5 days. The second-stage aerobic effluent enters the sec...

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Abstract

The invention relates to a 1,4-butanediol chemical waste water treatment technology, and belongs to the technical field of environment engineering. The 1,4-butanediol chemical waste water treatment technology comprises that high-density 1,4-butanediol production waste water is fed into a homogenization pond; the high-density 1,4-butanediol production waste water is fed into a two-stage aerobic reaction pond through an elevator pump; the high-density 1,4-butanediol production waste water treated by an aerobic reaction flows automatically into a settling pond; after muddy water is separated from the high-density 1,4-butanediol production waste water in the settling pond, the high-density 1,4-butanediol production waste water is discharged; and a part of the muddy water flows back to the two-stage aerobic reaction pond and the rest of the muddy water is dehydrated and then discharged, wherein a first section of the two-stage aerobic reaction pond is added with a biological carrier filling material and a second section of the two-stage aerobic reaction pond does not need a carrier filling material and is added only with sludge. The 1,4-butanediol chemical waste water treatment technology has the advantages of device work stabilization, high efficiency, stable quality of yielding water, convenience of automatic control, management and operation, and low operating cost.

Description

technical field [0001] The invention relates to a 1,4-butanediol chemical wastewater treatment process, which belongs to the technical field of environmental engineering. Background technique [0002] The process wastewater produced in the production of 1,4-butanediol has high pollutant concentration, high toxicity, complex pollutant components, and biodegradable substances. The typical COD value of wastewater is 20,000-30,000 mg / L. At present, the methods for treating 1,4-butanediol chemical wastewater mainly include: anaerobic + anoxic + aerobic, SBR process, etc., and mainly treat wastewater with COD below 1000mg / L, for COD above 5000mg / L The treatment of high-concentration process wastewater has not been reported. The anaerobic process is complex, with many control points, and the effects of anaerobic and anoxic treatments are not obvious. The SBR process is a batch operation, which is not suitable for wastewater treatment with continuous water volume and high concentr...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/12
Inventor 严月根倪志伟石剑峰
Owner 博瑞德环境集团股份有限公司
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