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A method for resourceful treatment of casing-heparin processing wastewater

A treatment method and technology for processing wastewater, which are applied in the preparation methods of peptides, chemical instruments and methods, flocculation/sedimentation water/sewage treatment, etc. Long time and other problems, to achieve good flocculation effect, reduce moisture content and improve recovery rate

Inactive Publication Date: 2016-04-06
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the density of flocs obtained from flocculation in wastewater is slightly higher than that of water, it takes a long time to settle, and the extract obtained after standing and discharging has a large water content, which is not conducive to centrifugation and drying processes
In addition, the flocculant used in this method is PAS bacterial protein, which is not common in the market, and the production cost is also relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] At room temperature, add FeCl-containing to 100 L of casing-heparin wastewater with a pH value of 8.0 3 80g of iron salt solution (mass concentration 40%), after stirring for 10min, add flocculant solution containing 5g of cationic polyacrylamide, continue to stir for 15min, after standing for 30min, the flocs gradually float up and gather, and the supernatant is discharged into the In the material tank, the water content of the floating matter is 90%, and the protein powder is obtained after spray drying. The recovery rate of protein was 82%, and the COD removal rate of wastewater was 68.2%.

Embodiment 2

[0022] At room temperature, add FeCl-containing to 100 L of casing-heparin wastewater with a pH value of 5.5 3 50g, CaCl 2 15g and ZnCl 2 15g of iron salt solution (mass concentration 40%), after stirring for 10min, add flocculant solution (mass concentration 0.2%) containing cationic polyacrylamide 3g and cationic starch 2g, continue stirring for 15min, after standing for 30min, the flocs gradually float up and Aggregation, the floating matter is discharged into the material tank through a scraper, the water content of the floating matter is 80%, and the protein powder is obtained after spray drying. The recovery rate of protein was 92.5%, and the COD removal rate of wastewater was 78.4%.

Embodiment 3

[0024] At room temperature, add FeCl-containing to 100 L of casing-heparin wastewater with a pH value of 6.0 3 50g and CaCl 2 30g of iron salt solution (mass concentration 40%), after stirring for 10min, add flocculant solution (mass concentration 0.2%) containing cationic starch 5g, continue stirring for 15min, after standing for 30min, the flocs gradually float up and gather, and the The floating matter is discharged into the material tank, the water content of the floating matter is 86%, and the protein powder is obtained after spray drying. The recovery rate of protein was 87%, and the COD removal rate of wastewater was 72%.

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Abstract

The invention discloses a resourceful treatment method of casing-heparin processing wastewater. The resourceful treatment method comprises the steps: adding a ferric salt solution in casing-heparin processing wastewater at normal temperature, uniformly mixing and then adding a flocculant solution, stirring for 10-15 min and then standing, gradually floating and gathering a floc in a standing process, collecting supernatants and drying to obtain protein powder. According to the resourceful treatment method disclosed by the invention, the yield of protein extracted from the casing-heparin processing wastewater is capable of reaching 92.5 percent, and the removal rate of COD in the wastewater reaches 78.4 percent. Compared with the prior art, the resourceful treatment method has the characteristics of high protein recovering rate and removal rate of COD in the wastewater, low water content of flocculated floc, and the like, and has the advantages of shortening the period of subsequent treatment of the wastewater, and reducing the energy consumption of drying protein.

Description

1. Technical field [0001] The invention relates to a resource treatment method of casing-heparin processing waste water, which extracts protein from the casing-heparin processing waste water and reduces COD in the waste water. 2. Background technology [0002] Casing-heparin processing wastewater is a kind of high-salt, high-nitrogen high-concentration organic wastewater, which is rich in animal protein, fat and other refractory organic substances. If the waste water is directly discharged, it will cause a large number of microorganisms in the water body to multiply, the dissolved oxygen will decrease, and the decay and odor will seriously affect human life. [0003] At present, my country's resource utilization measures for casing-heparin processing wastewater are not mature enough. Casing-heparin processing manufacturers generally choose biological treatment methods, that is, use salt-tolerant and halophilic microorganisms to biodegrade wastewater. direct discharge. The d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07K1/14C02F1/52C02F1/56
Inventor 翟林峰王波孙敏王华林
Owner HEFEI UNIV OF TECH
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