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Sewage treatment method of casing plant

A sewage treatment method and technology of sewage treatment station, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Efficiency, the effect of reducing the processing load

Inactive Publication Date: 2014-10-15
GUANGYUAN SHENDA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems encountered in the sewage treatment process of the casing factory in the above-mentioned prior art, a casing factory sewage treatment method with less investment, high efficiency, output, meeting the discharge standard, and adaptable to changes in discharge volume is provided

Method used

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specific Embodiment 1

[0034] like figure 1 Shown, a kind of casing factory sewage treatment method comprises the following steps:

[0035] (1) Salt casing production wastewater enters the collection pipe network and is collected to the grid set of the sewage treatment station. The large suspended solid matter in the sewage is intercepted by the grid set, and the separated grid residue is transported out for treatment, and the separated wastewater is processed in the next step ;

[0036] (2) Pump the wastewater from the previous step into the oil-separating sedimentation tank, let it stand still, and the insoluble protein precipitates at the bottom of the tank. After removing the surface layer of animal fat, the wastewater is processed in the next step, and the insoluble protein deposited at the bottom of the tank is Sexual proteins are recycled;

[0037] (3) Flow the oil- and protein-removed waste water from the pipeline into the blow-off regulating tank, and test the pH value of the waste water....

specific Embodiment 2

[0045] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the stirring speed in step (7) is 500rpm, the temperature in the pool is controlled at 40°C, the hydraulic retention time is 40h, and the anaerobic bacteria load is 20g / L; In step (8), the temperature in the first-level biological contact oxidation tank is controlled at 35°C, the hydraulic retention time is 12h, and the load of aerobic bacteria is 15g / L; the temperature in the second-level biological contact oxidation tank is controlled at 35°C, and the hydraulic retention time is 8h. The load of aerobic bacteria is 10g / L.

specific Embodiment 3

[0046] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the stirring speed in step (7) is 400rpm, the temperature in the pool is controlled at 35°C, the hydraulic retention time is 35h, and the anaerobic bacteria load is 15g / L; The temperature in the first-grade biological contact oxidation tank is controlled at 30°C, the hydraulic retention time is 10 hours, and the load of aerobic bacteria is 12.5g / L. It is 8.5g / L; in step (9), polyaluminum chloride is used as the flocculant, which can treat wastewater due to the bridging effect of its hydroxide ions and the polymerization of polyvalent anions. of suspended matter.

[0047] Adopt processing method of the present invention to have following effect:

[0048] 1) The grease trap is used in the front section to remove animal fat, and the air flotation equipment is used in the back section to further remove animal grease and suspended solids to ensure that all indicators in the...

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Abstract

The invention provides a sewage treatment method of a casing plant, specifically relates to a water pollution treatment method for industrial production of heparin sodium in the casing plant, and aims at solving the problems of high concentration of CODcr (Chemical Oxygen Demand), BOD5 (Biochemical Oxygen Demand), Na<+>, Cl<-> and ammonia nitrogen in sewage of the casing plant, existence of macromolecular organic matter, and large change in effluent volume. The method comprises the following steps: stopping dross through a grid; separating suspended solids; removing dust; separating oil; separating animal fat and insoluble protein on the surface layer; regulating water volume and quality; treating by decomposing by anaerobion through an UASB (Upflow Anaerobic Sludge Blanket) anaerobic reactor; treating by decomposing by aerobic bacteria through a two-stage biological contact oxidation pond; treating sludge; separating by air flotation; draining. The sewage treatment method of the casing plant is applicable to the field of treatment of sewage produced by the casing plant.

Description

technical field [0001] The invention relates to a method for treating water pollution in a casing factory, in particular to a method for treating water pollution in the industrial production of heparin sodium in a casing factory. Background technique [0002] Casing production wastewater mainly comes from casing cleaning and heparin sodium industrial production wastewater, and casing processing wastewater is high-salt, high-water-soluble organic wastewater. COD in casing factory sewage cr 、BOD 5 、Na + , Cl - And the concentration of ammonia nitrogen is high, it also contains macromolecular organic matter, and the amount of wastewater discharge varies greatly. These are the main problems in the treatment of this type of sewage. Commonly used biochemical treatment methods are not feasible. The main reason is that the salt content in sewage cannot meet the biochemical requirements, and the large variation of wastewater discharge also brings great difficulties to treatment. ...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 常国华郭婷婷
Owner GUANGYUAN SHENDA IND
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