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Method for treating wastewater being generated during vitamin C production

A treatment method, vitamin technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as poor biodegradability and complex components of vitamin C extraction wastewater, and achieve cost Low, high toxicity, high pollutant content effect

Active Publication Date: 2014-06-04
ATK HLDG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the complex composition of vitamin C extraction wastewater and poor biodegradability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The wastewater discharged from a pharmaceutical factory producing vitamin C is selected. The indicators of the wastewater are as follows: COD value 31000mg / l, BOD 5 The value is 2400mg / l, the total nitrogen (TN) value is 490mg / l, and the suspended solids (SS) value is 1400mg / l.

[0029] (1) Micro-electrolysis treatment, put iron filings into the raw water and blow air into the waste water at the same time, the amount of iron filings is 2kg / m 3 .

[0030] (2) flocculation and precipitation treatment, the supernatant after the micro-electrolysis treatment flows into the flocculation sedimentation tank, throws flocculant in the pond, and flocculant is the mixture of the residue and the solution of PAM produced when the above-mentioned molten salt electrolysis method produces magnesium, its The dosage is 3ml / L, first stir rapidly at 100 rpm for 1 minute, then change to 20 rpm for 10 minutes, then let the liquid stand for 1 hour.

[0031] (3) The supernatant of the sedimen...

Embodiment 2

[0035] The wastewater discharged from a pharmaceutical factory producing vitamin C is selected. The indicators of the wastewater are as follows: COD value 23000mg / l, BOD 5 The value is 2000mg / l, the value of total nitrogen (TN) is 550mg / l, and the value of suspended solids (SS) is 3100mg / l.

[0036] (1) Micro-electrolysis treatment, put iron filings into the raw water and blow air into the waste water at the same time, the amount of iron filings is 3kg / m 3 .

[0037] (2) flocculation and precipitation treatment, the supernatant after the micro-electrolysis treatment flows into the flocculation sedimentation tank, and throws flocculant in the pond, and the flocculant is the mixture of the residue and the solution of PAM produced when the above-mentioned molten salt electrolysis method produces magnesium, its The dosage is 4ml / L, first stir rapidly at 100 rpm for 1 minute, then change to 20 rpm for 10 minutes, then let the liquid stand for 1 hour.

[0038] (3) The supernatant ...

Embodiment 3

[0042] The wastewater discharged from a pharmaceutical factory producing vitamin C is selected. The indicators of the wastewater are as follows: COD value 45000mg / l, BOD 5 The value is 3420mg / l, the total nitrogen (TN) value is 453mg / l, and the suspended solids (SS) value is 1220mg / l.

[0043] (1) Micro-electrolysis treatment, put iron filings into the raw water and blow air into the waste water at the same time, the amount of iron filings is 2kg / m 3 .

[0044] (2) flocculation and precipitation treatment, the supernatant after the micro-electrolysis treatment flows into the flocculation sedimentation tank, and throws flocculant in the pond, and the flocculant is the mixture of the residue and the solution of PAM produced when the above-mentioned molten salt electrolysis method produces magnesium, its The dosage is 4ml / L, first stir rapidly at 100 rpm for 1 minute, then change to 20 rpm for 10 minutes, then let the liquid stand for 1 hour.

[0045] (3) The supernatant of the...

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Abstract

The invention provides a method for treating wastewater being generated during vitamin C production. The method comprises micro electrolyzing, flocculent settling, filtering and biological reacting. A better decontamination effect can be obtained, moreover, the cost is low, and raw materials are environment-friendly.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a treatment method for the sewage produced in the production of vitamin C. Background technique [0002] Vitamin C production wastewater is a high-concentration refractory organic wastewater whose CODcr can be as high as 30,000 to 50,000 mg / L; BOD 5 The ratio to CODcr is less than 0.3, and it is difficult to biodegrade; due to these characteristics, it often causes serious pollution to the environment. Pharmaceutical wastewater pollutants have the characteristics of high content, high concentration of suspended solids, strong toxicity, many refractory substances, rapid changes in water quality, large fluctuations in water volume, and complicated treatment. It has always been the focus and difficulty of industrial wastewater treatment. [0003] At present, anaerobic biochemical treatment and anaerobic-aerobic biochemical combined process are commonly used in the treatment of pharmaceu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 徐畅齐元峰戴碧波
Owner ATK HLDG GRP CO LTD
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