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Wastewater treatment method in starch glucose production

A starch glucose and wastewater treatment technology, applied in neutralization water/sewage treatment, flocculation/sedimentation water/sewage treatment, water/sewage multi-stage treatment, etc. Low cost and good treatment effect

Inactive Publication Date: 2013-09-18
NORTH CHINA PHARMA KANGXIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps clean up water pollution caused by harmful substances such as bacteria that may be found on household items like disposable plates used for cookery during food preparation. It does this through reducing the amount of contaminants released into rivers and lakes while also treating them efficiently with less expensive methods than traditional chemical processes.

Problems solved by technology

The technical problem addressed by this patented method for treating excessive amounts of sugar-producing wastes (waste) such as spent grain or bagasse during manufacturing processes involves disposal of these materials due to their low concentration levels compared with other sources like seafood products. This results in rapid consumption of dissolvable oxygen from nitrogen gas released into the environment when they are being treated. Additionally, there may also occur issues related to decomposition of suspending matters caused by bacterial activity that causes them to generate malodorous gases which make up smelling bad taste on aquatic environments around us.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: The waste water treatment method in this starch glucose production adopts following treatment steps.

[0017] a. Add sodium hydroxide to the wastewater with a pH of 5 and a COD of 6000 mg / l to adjust the pH to 6.5.

[0018] b. Add polyaluminum chloride in an amount of 30mg / L for precipitation, and then use a decanter centrifuge to remove solids;

[0019] c. Enter the filtered wastewater into the anaerobic reactor for anaerobic degradation reaction; the dissolved oxygen in the obtained wastewater is <0.5mg / L; 4

[0020] d. Anoxic denitrification reaction is performed on the process wastewater after anaerobic degradation; the dissolved oxygen in the obtained wastewater is ≥1 mg / L; the pH value is 6-7; the temperature is 20-35°C.

[0021] e. The waste water after the anoxic denitrification reaction is subjected to an aerobic reaction to remove ammonia nitrogen and further degrade it to obtain the trea...

Embodiment 2

[0025] Embodiment 2: the waste water treatment method in this starch glucose production adopts following treatment steps.

[0026] a. Add 30 mg / L polyaluminum chloride to wastewater with a pH of 6.55 and a COD of 5000 mg / l, and then use a decanter centrifuge to remove solids;

[0027] b. Enter the filtered wastewater into the anaerobic reactor for anaerobic degradation reaction; the dissolved oxygen in the obtained wastewater is <0.5mg / L; 4

[0028] c. Anoxic denitrification reaction is performed on the process wastewater after anaerobic degradation; the dissolved oxygen in the obtained wastewater is ≥1mg / L; the pH value is 6-7; the temperature is 20-35°C.

[0029] d. The waste water after the anoxic denitrification reaction is subjected to an aerobic reaction, ammonia nitrogen is removed and further degraded, and the waste water after comprehensive treatment can be obtained.

[0030] After comprehensive treatment, the...

Embodiment 3

[0033] Embodiment 3: the waste water treatment method in this starch glucose production adopts following treatment steps.

[0034] a. Add sodium hydroxide to the wastewater with a pH of 5.38 and a COD of 6500 mg / l to adjust the pH to 6.0.

[0035] b. Add polyaluminium chloride in an amount of 40 mg / L for precipitation, and remove solids with a decanter centrifuge;

[0036] c. Enter the filtered wastewater into the anaerobic reactor for anaerobic degradation reaction; the dissolved oxygen in the obtained wastewater is <0.5mg / L; 4

[0037] d. Anoxic denitrification reaction is performed on the process wastewater after anaerobic degradation; the dissolved oxygen in the obtained wastewater is ≥1 mg / L; the pH value is 6-7; the temperature is 20-35°C.

[0038] e. The waste water after the anoxic denitrification reaction is subjected to an aerobic reaction to remove ammonia nitrogen and further degrade it to obtain the treate...

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PUM

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Abstract

The invention discloses a wastewater treatment method in starch glucose production. The wastewater treatment method comprises the following steps of: (1) carrying out flocculent precipitation, namely, adjusting the pH value of starch glucose production wastewater, and subsequently adding a flocculant to precipitate; (2) using a horizontal spiral centrifuge, namely, eliminating solid matters in flocculated wastewater by using the a horizontal spiral centrifuge so as to obtain deslagged wastewater; (3) carrying out anaerobic reaction, namely, carrying out anaerobic degradation reaction on the deslagged wastewater after being subjected to mixing buffering; (4) carrying out anoxia reaction, namely, carrying out an anoxia denitrification reaction on the wastewater subjected to anaerobic degradation; and (5) carrying out an aerobic reaction, namely, carrying out aerobic reaction on the wastewater subjected to anoxia denitrification reaction, carrying out ammonia nitrogen removal and further degradation. By utilizing the method, in the process that suspended matters are eliminated, the suspended matters or organic substances adhered to the suspended matters are effectively eliminated, the later organic substance treatment pressure is effectively alleviated, and the wastewater treatment method has the characteristics of low sewage treatment cost and good treatment effect.

Description

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Claims

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Application Information

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Owner NORTH CHINA PHARMA KANGXIN
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