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Method for treating epoxypropane wastewater by using yttrium-doped biological membrane

A technology of propylene oxide and biofilm, which is applied in the direction of special compound water treatment, natural water treatment, water treatment parameter control, etc., can solve the problems affecting the continuous treatment of wastewater, biofilm shedding, aging failure, etc., and achieve the improvement of aerobic biological Degradation performance, less nutrient dosage, improved anti-aging effect

Inactive Publication Date: 2019-04-16
辽宁中舟得水环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, in the treatment of wastewater from the 100,000-ton hydrogen peroxide method for propylene oxide project, the content of alkali and salt in the organic wastewater is relatively high, which will easily lead to the phenomenon of biofilm shedding or aging failure in the biofilm packed tower, and its impact Continuous treatment of large volumes of wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of method using yttrium-doped biofilm of the present invention to process propylene oxide wastewater, its technical scheme is as follows:

[0026] Step 1. Put the wastewater from the propylene oxide workshop section into the homogenization tank for homogenization and equalization. The sewage is mechanically stirred in the homogenization tank to adjust the water quantity and water quality, so as to maintain the stability of the biochemical influent to the greatest extent;

[0027] Step 2, adding sodium hydroxide into the homogeneous waste water, adjusting the pH value to 7.5, and using mechanical stirring to mix the waste water in the bioregulation tank;

[0028] Step 3. The effluent from the biological adjustment tank flows into the middle tank by gravity, and 0.5kg / t potassium dihydrogen phosphate and 0.7kg / t urea are added to the middle tank according to the amount of wastewater for the growth of organisms. The time is 8 hours; the intermediate pool is designed...

Embodiment 2

[0039] A kind of method using yttrium-doped biofilm of the present invention to process propylene oxide wastewater, its technical scheme is as follows:

[0040] Step 1. Put the wastewater from the propylene oxide workshop section into the homogenization tank for homogenization and equalization. The sewage is mechanically stirred in the homogenization tank to adjust the water quantity and water quality, so as to maintain the stability of the biochemical influent to the greatest extent;

[0041] Step 2, add sodium hydroxide into the homogeneous waste water, adjust the pH value to 6.5, and use mechanical stirring to mix the waste water in the bioregulation tank;

[0042] Step 3. The effluent from the biological adjustment tank flows into the intermediate pool by gravity, and 0.1kg / t potassium dihydrogen phosphate and 0.1kg / t urea are added to the intermediate pool according to the amount of wastewater for the growth of organisms. The intermediate pool adopts mechanical stirring me...

Embodiment 3

[0053] A kind of method using yttrium-doped biofilm of the present invention to process propylene oxide wastewater, its technical scheme is as follows:

[0054] Step 1. Put the wastewater from the propylene oxide workshop section into the homogenization tank for homogenization and equalization. The sewage is mechanically stirred in the homogenization tank to adjust the water quantity and water quality, so as to maintain the stability of the biochemical influent to the greatest extent;

[0055] Step 2. Add sodium hydroxide into the homogeneous waste water to adjust the pH value to 8.5, and use mechanical stirring to mix the waste water in the bioregulation tank;

[0056] Step 3. The effluent from the biological adjustment tank flows into the middle tank by gravity, and 0.8kg / t potassium dihydrogen phosphate and 1.2kg / t urea are added to the middle tank according to the amount of wastewater for the growth of organisms. The time is 6-10 hours; the middle tank is designed with a s...

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Abstract

The invention relates to the field of industrial wastewater treatment, and discloses a method for treating epoxypropane wastewater by using an yttrium-doped biological membrane. According to the scheme, for the characteristic that the content of organic matter and salt in wastewater in an epoxypropane project is high, anaerobic treatment is firstly carried out on the wastewater to reduce the content of the organic matter, and marsh gas is generated to be recycled as an energy source. The biological membrane with an yttrium-doped film sulfonamide modifier is used in an A / O biochemical system reactor to effectively improve the anti-aging and anti-fouling properties of the biological membrane, so that the biological membrane can be used for a longer time, and the method is suitable for the treatment of high-flow wastewater. The method for treating the epoxypropane wastewater by using the yttrium-doped biological membrane has the advantages that the dosage of nutritive salt is small, the sludge discharge amount is small, the biochemical reaction effect is good, and the method is suitable for treating the wastewater in the project for preparing the epoxypropane by using a hydrogen peroxide method.

Description

technical field [0001] The invention relates to the field of industrial waste water treatment, and is suitable for the treatment of waste water of a hydrogen peroxide method to produce propylene oxide project. Specifically, it relates to a method for treating propylene oxide wastewater using yttrium-doped biofilm. Background technique [0002] With the rapid development of economic construction, the discharge of a large amount of industrial wastewater has led to varying degrees of pollution of water resources across the country, which has a serious impact on people's physical and mental health. At present, although my country has made some progress in industrial wastewater purification and recycling technology, there are still some problems. Many enterprises only carry out routine treatment of wastewater. Although the wastewater has achieved standard discharge, the wastewater treatment technology still needs to be improved. [0003] CN107651769A provides an industrial waste...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F103/36
CPCC02F9/00C02F1/52C02F1/66C02F3/30C02F2101/30C02F2103/36C02F2209/08C02F2305/06
Inventor 王静叶兆健苗畅通周子卿聂颖
Owner 辽宁中舟得水环保科技有限公司