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A kind of advanced treatment method of vb12 wastewater biochemical treatment effluent

A technology of biochemical treatment and advanced treatment, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of reducing COD and chroma of wastewater, unspecified biochemical treatment system, wastewater Solve the problems of up-to-standard discharge and other issues, and achieve the effects of saving energy consumption, facilitating engineering promotion and application, and strong adsorption capacity

Inactive Publication Date: 2016-04-20
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102923862A has announced to VB 12 Waste water is used as raw material to ferment and produce bacterial protein with microorganisms, reduce the COD and chroma of waste water, and then use the enterprise's conventional biochemical treatment system (not specified in the patent) to treat the fermented waste water, which reduces the load of the biochemical treatment part to a certain extent, but the patent It does not indicate that the biochemical treatment system can discharge wastewater up to standard
[0005] The coagulation method can only remove organic matter with a relatively large molecular weight in wastewater; the Fenton method can treat various refractory organic matter, but its disadvantage is that the cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a VB 12 The effluent quality of wastewater biochemical treatment is as follows: COD840mg / L, chroma 700 times.

[0029] The method for advanced treatment of wastewater biochemical treatment effluent comprises the following steps:

[0030] (1) Adjust VB 12 The pH range of the wastewater biochemical treatment effluent is 4, and 300mg / L of polyferric sulfate is added for enhanced coagulation treatment; the preparation of the polyferric sulfate is to add the pickled iron-containing wastewater into the dissolution tank, and add sulfuric acid and ferrous sulfate at the same time; After the ferrous sulfate is basically dissolved, it is transferred to the oxidation reactor device through a pump, and the catalyst nitrite is added and oxygen is introduced. The circulating pump of the reactor device flows the reaction liquid in the reactor, and polymerizes ferric sulfate after 2 hours of polymerization;

[0031] (2) Settling for half an hour after enhanced coagulation for solid-...

Embodiment 2

[0036] a VB 12 The effluent quality of wastewater biochemical treatment is as follows: COD640mg / L, color 600 times.

[0037] The method for advanced treatment of wastewater biochemical treatment effluent comprises the following steps:

[0038] (1) Adjust VB 12 The pH range of the wastewater biochemical treatment effluent is 5, and 100 mg / L of polyferric sulfate is added for enhanced coagulation treatment; the preparation of the polyferric sulfate is to add the pickled iron-containing wastewater into the dissolution tank, and add sulfuric acid and ferrous sulfate at the same time; After the ferrous sulfate is basically dissolved, it is transferred to the oxidation reactor device through a pump, and the catalyst nitrite is added and oxygen is introduced. The circulating pump of the reactor device flows the reaction liquid in the reactor, and polymerizes ferric sulfate after 3 hours of polymerization;

[0039] (2) Settling for half an hour after enhanced coagulation for solid-...

Embodiment 3

[0044] a VB 12 The effluent quality of wastewater biochemical treatment is as follows: COD640mg / L, color 600 times.

[0045] The method for advanced treatment of wastewater biochemical treatment effluent comprises the following steps:

[0046] (1) Adjust VB 12 The pH range of the wastewater biochemical treatment effluent is 4.5, and 200mg / L of polyferric sulfate is added for enhanced coagulation treatment; the preparation of the polyferric sulfate is to add the pickled iron-containing wastewater into the dissolution tank, and add sulfuric acid and ferrous sulfate at the same time; After the ferrous sulfate is basically dissolved, it is transferred to the oxidation reactor device through a pump, and the catalyst nitrite is added and oxygen is introduced. The circulating pump of the reactor device flows the reaction solution in the reactor, and polymerizes ferric sulfate after 2.5 hours of polymerization;

[0047] (2) Settling for half an hour after enhanced coagulation for s...

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PUM

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Abstract

An advanced treatment method of VB12 wastewater biochemical treatment effluent. The method includes following steps: (1) adjusting a pH range of the VB12 wastewater biochemical treatment effluent to be 4-5 and adding 100-300 mg / L of polyferric sulfate for carrying out an enhanced coagulation process; (2) carrying out a precipitating operation for half an hour after the enhanced coagulation process finished and performing solid-liquid separation, (3) adding 280-420 mg / L of H2O2, 167-334 mg / L of FeSO4.7H2O to the effluent treated through the step (2) and carrying out a Fenton reaction for 1-3 h; and (4) after the Fenton reaction being carried out for 1-3 h, adding an alkali to adjust the pH to neutrality, stopping the Fenton reaction, performing a precipitating operation, filtering a supernate, adding modified minerals and PAC to the supernate for performing adsorption, allowing the supernate to stand and performing the solid-liquid separation for discharging the effluent with a standard being reached. Compared with a single coagulation method and a single Fenton method, the method allows the coagulation to be enhanced and is combined with the Fenton method so that a treatment effect is improved and a treatment cost is reduced.

Description

technical field [0001] The invention belongs to the field of waste water treatment, specifically a VB 12 The advanced treatment method of wastewater biochemical treatment effluent. Background technique [0002] Vitamin B 12 , referred to as VB 12 , our country is VB 12 Large production countries, North China Pharmaceutical Group, CSPC, Hebei Yufeng Group, Ningxia Duowei Pharmaceutical, etc. are all VB 12 manufacturer. VB 12 A large amount of wastewater will be generated during the production process, and the wastewater contains refractory substances such as culture medium residues, macromolecular proteins, ketones, propionic acid, and dimethylbenzimidazole. VB in actual engineering 12 Most of the wastewater treatment processes are anaerobic-aerobic biological treatment, but the effluent of this process cannot meet the COD in the "Integrated Wastewater Discharge Standard" (GB8978-1996). Cr ≤300mg / L regulation. In response to this problem, the researchers conducted ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06
Inventor 许柯陈琳任洪强丁丽丽耿金菊
Owner NANJING UNIV