Combinative processing method of 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. Good effect and the effect of saving reagent consumption

Active Publication Date: 2016-08-17
CHINA NAT OFFSHORE OIL CORP +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, for wastewater with a higher concentration of acrylic acid and esters, especially wastewater with a COD>4

Method used

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  • Combinative processing method of high-concentration acrylic acid and ester wastewater
  • Combinative processing method of high-concentration acrylic acid and ester wastewater
  • Combinative processing method of high-concentration acrylic acid and ester wastewater

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Experimental program
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Effect test

Example Embodiment

[0023] Example 1:

[0024] The water quality of acrylic acid and ester wastewater taken from an enterprise is shown in Table 1.

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

[0026]

[0027] The above-mentioned wastewater was first subjected to ultrasonic pretreatment. The ultrasonic pretreatment procedure was as follows: the first stage, the frequency of 300KHz, the temperature of 35°C, and the reaction for 1 hour; the second stage, the frequency of 50KHz, and the room temperature, the reaction was 30min. After ultrasonic pretreatment, the B / C value of wastewater was increased from 0.21 to 0.65, which greatly reduced the pressure of biological treatment. The effluent of ultrasonic pretreatment is treated by anaerobic method. 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 subjected to two-stage aerobic treatment. The first-s...

Example Embodiment

[0036] Example 2:

[0037] The water quality of acrylic acid and ester wastewater taken from an enterprise is shown in Table 5.

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

[0039]

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

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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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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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