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A combined treatment method for high-concentration acrylic acid and ester wastewater

A treatment method, acrylic acid technology, applied in multi-stage water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Metabolic rate, the effect of reducing effluent turbidity

Active Publication Date: 2019-01-15
CHINA NAT OFFSHORE OIL CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for wastewater with a higher concentration of acrylic acid and esters, especially wastewater with a COD>40000 mg / L, it is impossible to achieve up-to-standard discharge by using the above-mentioned existing technologies.

Method used

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  • A combined treatment method for high-concentration acrylic acid and ester wastewater
  • A combined treatment method for high-concentration acrylic acid and ester wastewater
  • A combined treatment method for high-concentration acrylic acid and ester wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Acrylic acid and ester wastewater from an enterprise, the water quality is shown in Table 1.

[0025] Table 1 Water quality of acrylic acid and ester wastewater

[0026]

[0027] The above-mentioned waste water is first pretreated by ultrasonic method. The procedure of ultrasonic pretreatment is: first stage, frequency 300KHz, temperature 35°C, reaction for 1h; second stage, frequency 50KHz, room temperature, reaction for 30min. After ultrasonic pretreatment, the B / C value of wastewater increased from 0.21 to 0.65, greatly reducing the pressure of biological treatment. Ultrasonic pretreatment effluent is treated by anaerobic method, and the anaerobic method adopts UASB process (organic content of granular sludge VSS 45-60g / L, particle size 0.5-3.5mm), and the residence time is 24h. The anaerobic effluent is treated with two-stage aerobic treatment. The first-stage aerobic method adopts the contact oxidation method with a residence time of 24 hours; the second-stage ...

Embodiment 2

[0037] Acrylic acid and ester wastewater from a certain enterprise, the water quality is shown in Table 5.

[0038] Table 5 Water quality of acrylic acid and ester wastewater

[0039]

[0040] The above-mentioned waste water is first pretreated by ultrasonic method. The procedure of ultrasonic pretreatment is: first stage, frequency 400KHz, temperature 40°C, reaction for 1.5h; second stage, frequency 200KHz, room temperature, reaction for 1h. After ultrasonic pretreatment, the B / C value of wastewater increased from 0.18 to 0.70, which enhanced the biodegradability of wastewater and facilitated further treatment by biological methods. The ultrasonic pretreatment effluent is treated by anaerobic method, and the anaerobic method adopts EGSB process (granular sludge organic matter content VSS 35-55g / L, particle size 0.5-4.0mm), and the residence time is 48h. The anaerobic effluent is treated with two-stage aerobic treatment. The first-stage aerobic method adopts the SBR method...

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Abstract

The invention discloses a combinative processing method of high-concentration acrylic acid and ester wastewater, and belongs to the technical field of processing of high-concentration organic wastewater. The method provided by the invention adopts a combinative process of ultrasonic-method preprocessing, an anaerobic method, a two-stage aerobic method and ultrasonic-method deep processing for processing high-concentration acrylic acid and ester wastewater with a COD (Chemical Oxygen Demand) value larger than 40,000mg / L, wherein the ultrasonic-method preprocessing is carried out by adopting two stages; the relatively-high-frequency processing is first adopted; afterwards, the low-frequency processing is adopted; processed outlet water has a COD smaller than 60mg / L and is up to the national grade-1 discharge standard in Integrated Wastewater Discharge Standard (GB8978-1996).

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a combined treatment method for high-concentration acrylic acid and ester wastewater. Background technique [0002] With the rapid development of acrylic acid and its esters industry, the annual treatment volume of acrylic acid and its esters wastewater is gradually increasing. Acrylic acid and ester wastewater has the characteristics of high concentration (up to tens of thousands to hundreds of thousands mg / L), complex components, high salt content, high toxicity, and difficult treatment. If it cannot be effectively treated, it will inevitably have a huge impact on the environment. At present, the methods for treating acrylic acid and ester wastewater are mainly incineration method, wet catalytic oxidation method, biological method and so on. A common disadvantage of the incineration method and the wet catalytic oxidation method is that a large amount of energy is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/34
CPCC02F1/36C02F3/02C02F3/28C02F9/00C02F2101/34C02F2301/08
Inventor 官赟赟顾锡慧雷太平李亮张艳芳
Owner CHINA NAT OFFSHORE OIL CORP
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