High-efficiency biological strengthened treatment process for waste water generated in paper making

A bioaugmentation and papermaking wastewater technology, which is applied in processing wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of complex composition, large amount of wastewater, poor biodegradability, etc. To achieve the effect of reducing the sludge bulking rate, reducing the operating cost, and improving the quality of the effluent water

Inactive Publication Date: 2011-01-26
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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  • Application Information

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Problems solved by technology

Its characteristics are: the amount of wastewater is large, generally up to 70% to 90% of the water consumption of papermaking wastewater manufacturers; the wastewater has high chroma and complex composition, and its organic components are mostly lignin fragments, which contain various types of color. groups and polar groups, and may also be mixed with various additives; the chemical oxygen demand (COD) is r

Method used

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  • High-efficiency biological strengthened treatment process for waste water generated in paper making

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Example Embodiment

[0026] Example 1

[0027] Sewage from a paper-making company enters a high-efficiency bio-enhanced tank after anaerobic. COD is 464.4 mg / L, NH3-N is 15.34 mg / L, TN is 22.33 mg / L, TP is 2.1 mg / L, and the color is 260 times. The high-efficiency bio-enhanced pool adopts 100% external reflux and 30()% internal reflux. The dosage of powder activated carbon is 50mg / L. The residence time is 20h. The amount of aeration supply is provided in accordance with the air-water ratio of 20:1. The effluent quality COD is 104.3mg / L, NH3-N is 1.34mg / L, TN is 9.6mg / L, TP is 0.8mg / L, and the color is 80 times.

Example Embodiment

[0028] Example 2

[0029] Other operations are as in Example 1. But do not add powder activated carbon. The effluent quality COD is 148.3mg / L, NH3-N is 3.34mg / L, TN is 12.6mg / L, TP is 1.2mg / L, and the color is 120 times.

Example Embodiment

[0030] Example 3

[0031] Other operations are as in Example 1. The effluent water quality COD is 154.4mg / L, NH3-N is 3.34mg / L, TN is 32.4mg / L, TP is 0.9mg / L, and the color is 80 times.

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Abstract

The invention provides a method of feeding powdered activated carbon in the specific position for solving the problems occurring in the biochemical treatment process of waste water generated in paper making; and simultaneously, an anoxic pool is arranged for removing nitrates in the water, controlling TN in the discharged water and reducing the sludge bulking probability. The pretreated waste water generated in paper making automatically flows into or is lifted by a water pump to enter an anoxic zone of a high-efficiency biological strengthened treatment pool; the waste water treated in the anoxic zone automatically flows into an aerobic zone; the waste water treated in the aerobic zone automatically flows into a settling zone; and the water treated in the settling zone automatically flows into or is lifted by the water pump to enter subsequent treatment units or is discharged. The reactor enables the biochemical treatment unit of the waste water generated in paper making to have the advantages of stable operation, better quality of the discharged water, reduced operation cost and the like.

Description

technical field [0001] The invention designs a method for treating papermaking wastewater, specifically, a method for treating papermaking wastewater by using high-efficiency bioaugmentation technology. Background technique [0002] Papermaking wastewater consists of various processing procedures of papermakers, materials lost in the production process, and sewage that washes the ground. Its characteristics are: the amount of wastewater is large, generally up to 70% to 90% of the water consumption of papermaking wastewater manufacturers; the wastewater has high chroma and complex composition, and its organic components are mostly lignin fragments, which contain various types of color. groups and polar groups, and may also be mixed with various additives; the chemical oxygen demand (COD) is relatively high, while the biochemical oxygen demand (BOD) is relatively small, and the biodegradability is poor; the quality of papermaking wastewater varies with raw materials , The pro...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F103/28
Inventor 涂勇刘伟京吴伟郭方峥林乔乔
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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