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Decoloration method for fermentation wastewater biochemical treatment tail water

A technology for biochemical treatment and fermentation wastewater, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Good decolorization effect, low operating cost and simple operation

Active Publication Date: 2012-03-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrolytic decolorization can remove water-soluble colored organic substances, but due to the existence of colloidal or granular organic substances, the conduction of electric current and the mass transfer of organic substances in wastewater are hindered, and the treatment effect is poor. To achieve a better treatment and decolorization effect, the treatment time Long, high power consumption, high operating costs

Method used

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  • Decoloration method for fermentation wastewater biochemical treatment tail water
  • Decoloration method for fermentation wastewater biochemical treatment tail water

Examples

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Effect test

Embodiment 1

[0023] The inventive method according to figure 1 The process of the treatment method is applied to the decolorization of the tail water of the vitamin C production wastewater through the secondary biochemical treatment, and the chromaticity of the influent is 250 times. Material Factory) dosage of 0.5g / L, PAM (non-ionic polyacrylamide, Shandong Liaocheng Changlong Chemical Raw Materials Co., Ltd.) dosage of 1mg / L, the chromaticity of the effluent after coagulation treatment is 200 times, the chroma removal rate is 20%. The waste water enters into the three-dimensional electrolysis reactor, and the electrolysis cell of the three-dimensional electrolysis reactor is a cuboid formed by bonding plexiglass plates, and its length, width and height are 20cm, 10cm and 16cm respectively. The cathode is a stainless steel plate, the anode is a graphite plate, and the size of the electrode plates is 10cm×16cm, a total of 3 pairs. The cathode and anode plates are connected to a DC stabili...

Embodiment 2

[0026] When the method of the present invention is applied to the biochemical treatment tail water decolorization of vitamin B12 production wastewater, the chromaticity of the influent is 300 times, and the dosage of coagulant modified PAC is 0.7g / L, and the dosage of PAM is 2mg / L. Under these conditions, the chroma of the effluent after coagulation treatment is 200 times, and the chroma removal rate is 33.3%. Wastewater enters the three-dimensional electrolysis reactor (same as Example 1), and the filling amount of activated carbon particles in the third pole is 60g / L, and the current density is 30A / m 2 1. Under the condition of voltage 10V, electrolytic treatment for 25 minutes, the chroma of the effluent is 20 times, and the chroma removal rate reaches 90%.

Embodiment 3

[0028] When the method of the present invention is applied to the decolorization of tail water of biochemical treatment of alcohol production wastewater, the chromaticity of the influent is 450 times, and the dosages of coagulant polyaluminum ferric sulfate and coagulant aid PAM are respectively 1.0 g / L and 10 mg / L Under certain conditions, the chroma of the coagulation treatment effluent is 360 times, and the chroma removal rate is 20%. The waste water enters the three-dimensional electrolysis reactor (same as Example 1), the filling amount of activated carbon particles in the third pole is 60g / L, the dosage of electrolyte NaCl is 0.2g / L, and the current density is 80A / m 2 1. Under the condition of a voltage of 12V, electrolytic treatment for 25 minutes, the chroma of the effluent is 50 times, and the chroma removal rate reaches 86%.

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Abstract

The invention discloses a decoloration method for fermentation wastewater biochemical treatment tail water, belonging to the field of waste water treatment. The decoloration method comprises the following treatment steps of: adding coagulant modification PAC (Polymeric Aluminum) and a coagulant aid of PAM (Polyacrylamide) respectively to fermentation wastewater biochemical treatment tail water ina first coagulation reactor and a second coagulation reactor for treatment; removing colloid coloring organic matter in the tail water; and introducing the deposited effluent to a three-dimensional electrolysis reactor for treatment, and removing the soluble coloring organic matter. The treated effluent chrominance reaches the primary standard of the national sewage discharge standards (GB8978-1996). In the invention, the processes of chemical coagulation and electrolytic oxidation are organically combined without generating secondary pollution, the recycling of resources can be realized. Thedecoloration method has simple operation, convenience for management, low running cost, strong practical value and broad application prospect.

Description

technical field [0001] The invention relates to the field of advanced treatment of industrial wastewater, in particular to a method for decolorizing tail water of biochemical treatment of fermentation wastewater by combining chemical coagulation and electrolytic oxidation processes. Background technique [0002] The fermentation industry is a kind of production industry that occupies an important position in national production. For example, the pharmaceutical industry produces antibiotics and vitamins, and the chemical industry produces alcohol, butanol, itaconic acid and other products. These fermentation products are closely related to people's lives. In fermentation production, a variety of organic raw materials (including a large amount of sugar, protein, amino acid, alcohol compounds, etc.) and a variety of inorganic substances (various inorganic salts, acids, alkalis, etc.) are used for microbial fermentation to produce products. , conversion and synthesis, refining a...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F1/461C02F1/52C02F1/56
Inventor 任洪强胡小兵王钊郭瑞昕丁丽丽许柯
Owner NANJING UNIV
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