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An integrated treatment process for propylene oxide co-production methyl tert-butyl ether wastewater

A technology of methyl tert-butyl ether and propylene oxide, which is applied in the field of wastewater treatment, can solve the problems of complex sewage treatment process and high operating costs, and achieve improved biodegradability, improved biodegradability, and shock load resistance Effect

Active Publication Date: 2019-12-27
河南君和环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After this patented technology was introduced into China, due to the complexity of pure oxygen deep well aeration sewage treatment process and high operating costs, it is urgent to solve its supporting sewage treatment technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The integrated treatment process of the propylene oxide co-production methyl tert-butyl ether wastewater of the present embodiment, the steps are as follows:

[0038] (1) The co-oxidation of propylene and isobutane to produce propylene oxide and co-production of methyl tert-butyl ether produces waste water. The COD is 12000mg / L, and the total influent volume load of the two-stage anaerobic reactor is 4.25kgCOD / (m 3 • d), the daily water intake is 28.3L, add sodium dihydrogen phosphate according to COD:P=200:1 (mass ratio), the first stage reactor uses sulfuric acid to adjust the pH, control the pH of the influent to 5.8, and the volume load is 2.9Kg COD / (m 3 • d); The influent pH value of the second-stage anaerobic reactor is 7.0, and the volume load is 1.35 KgCOD / (m 3 •d); the two-stage anaerobic reactor maintains a reaction temperature of 34~36°C, and the total hydraulic retention time is 68h; the effluent COD of the two-stage anaerobic reactor is 3800mg / L, and the r...

Embodiment 2

[0042] The integrated treatment process of the propylene oxide co-production methyl tert-butyl ether wastewater of the present embodiment, the steps are as follows:

[0043] (1) The co-oxidation of propylene and isobutane to produce propylene oxide co-produces methyl tert-butyl ether production wastewater. The COD is 11200mg / L after testing, and the total influent volume load of the two-stage anaerobic reactor is 4.10kgCOD / (m 3 • d), the daily water intake is 29.3L, adding sodium dihydrogen phosphate according to COD:P=200:1, the first stage reactor uses sulfuric acid to adjust the pH, the pH of the influent is controlled to 6.0, and the volume load is 2.85Kg COD / (m 3 • d); the influent pH value of the second-stage anaerobic reactor is 7.2, and the volume load is 1.25Kg COD / (m 3 • d); the two-stage anaerobic reactor maintains a reaction temperature of 34~36°C, the total hydraulic retention time is 70h, the effluent COD of the two-stage anaerobic reactor is 3680mg / L, and the re...

Embodiment 3

[0047] The integrated treatment process of the propylene oxide co-production methyl tert-butyl ether wastewater of the present embodiment, the steps are as follows:

[0048] (1) The co-oxidation of propylene and isobutane to produce propylene oxide and co-production of methyl tert-butyl ether produces waste water. The COD is 11800mg / L, and the total influent volume load of the two-stage anaerobic reactor is 4.00kgCOD / (m 3 • d), the daily water intake is 27.1L, and sodium dihydrogen phosphate is added according to COD:P=200:1. The first stage reactor uses sulfuric acid to adjust the pH, and the pH of the influent water is controlled to be 6.2, and the volume load is 2.8Kg COD / (m 3 •d) The influent pH value of the second-stage anaerobic reactor is 7.2, and the volume load is 1.2Kg COD / (m 3 •d); the two-stage anaerobic reactor maintains a reaction temperature of 34~36°C, the total hydraulic retention time is 71h, the effluent COD of the two-stage anaerobic reactor is 3918mg / L, an...

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Abstract

The invention discloses an integrated processing process for waste water generated during coproduction of epoxypropane and methyl tertiary butyl ether. The process comprises the following steps: (1) anaerobic treatment: carrying out anaerobic treatment on waste water by using series connection of two stages of UASB anaerobic reactors in combination with zero-valent iron; (2) aerobic treatment: carrying out aerobic treatment on anaerobic effluent by adopting an activated sludge process; (3) oxidation treatment: carrying out advanced treatment on aerobic effluent by adopting a Fenton oxidizing process. The processing process integrates the advantages of two stages of UASB anaerobic technology, zero-valent iron technology, conventional activated sludge process and Fenton oxidizing technology, and can reach the removal rate of 98.33% for COD in production waste water; concentrations of SO4(2) and S(2) are reduced by the combination of the primary anaerobic reactor and zero-valent iron technology, thus shielding the influence of sulfate from the second stage of reactor, and reducing processing difficulty; refractory organic matters in waste water are further removed by Fenton oxidization, so that the effluent reaches discharge requirement, the processing cost is low, the effect is good, and resistance to impact load is strong.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and specifically relates to a water treatment technology of two-stage UASB anaerobic reactor combined with zero-valent iron, activated sludge method and Fenton advanced treatment, and is applicable to the production of propylene oxide by the co-oxidation method of propylene and isobutane Co-production of methyl tert-butyl ether (PO / MTBE) wastewater. Background technique [0002] A company uses the co-oxidation method of propylene and isobutane to produce propylene oxide and co-produce methyl tert-butyl ether. The patented technology uses isobutane, oxygen and propylene as raw materials to produce propylene oxide (PO) by co-oxidation , while co-producing methyl tert-butyl ether (MTBE). Propylene oxide co-production methyl tert-butyl ether (PO / MTBE) production process discharges high-concentration process sewage during the production process, and its main components are propylene gly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/36
CPCC02F1/66C02F1/722C02F3/12C02F3/2846C02F3/30C02F9/00C02F2103/36C02F2301/08C02F2305/026
Inventor 代吉华齐云桓孙培彬郜白璐史明王海娟张文龙史豪杰唐启
Owner 河南君和环保科技有限公司
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