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Treatment method for starch wastewater

A technology for starch wastewater and treatment method, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high cost, secondary pollution, long time consumption, etc. Low, no secondary pollution, short time-consuming effect

Active Publication Date: 2014-10-15
SICHUAN KELUN PHARMA RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the defects of high cost, long time-consuming and easy to cause secondary pollution in the existing starch wastewater treatment method, the present invention provides a new starch wastewater treatment method

Method used

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  • Treatment method for starch wastewater
  • Treatment method for starch wastewater

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Embodiment 1

[0048] Embodiment 1 starch wastewater treatment method of the present invention

[0049] Wastewater: Take starch sewage and filter and take samples for water quality analysis. The analysis results are COD: 7241mg / L, BOD5 5412mg / L, NH4 + 61.2mg / L, protein 2104mg / L, carbohydrate 5329mg / L, pH5.73.

[0050] 1. Processing method

[0051] Such as figure 1 The process flow chart shown:

[0052] (1) Take starch wastewater and process it through a grid with a gap of 2mm;

[0053] (2) Take 1000ml of filtered starch wastewater and put it in a beaker for use. Quickly add the suspension A made of 0.5g of feed-grade chlorella powder and 2ml of water into the beaker filled with wastewater, stir and mix; Check the pH during the process, and the final pH is stable at 5.81. Use 3mol / L sodium hydroxide solution to adjust the pH to be stable at 6.22; quickly prepare the suspension prepared by 0.4g of feed grade dry yeast powder (brewer's yeast) and 3ml of water B is slowly added to the wast...

Embodiment 2

[0057] Embodiment 2 starch wastewater treatment method of the present invention

[0058] After the starch sewage was filtered, samples were taken for water quality analysis, and the analysis results were COD: 9462mg / L, BOD5 7128mg / L, NH4 + 75.8mg / L, protein 2953mg / L, carbohydrate 6541mg / L, pH5.59.

[0059] 1. Processing method

[0060] Such as figure 1 The process flow chart shown:

[0061] (1) Take starch wastewater and process it through a grid with a gap of 5mm;

[0062] (2) Take 1000ml of filtered starch wastewater and put it in a beaker for later use. Quickly add the suspension A prepared in advance from 0.8g of feed grade Sargassum powder and 8ml of water into the beaker filled with wastewater, stir and mix; Check the pH during the homogenization process, and the final pH is stable at 5.67. Use 3mol / L sodium hydroxide solution to adjust the pH to be stable at 6.89. Quickly prepare the suspension prepared by 1.0g of feed grade dry yeast powder (brewer's yeast) and 4m...

Embodiment 3

[0066] Embodiment 3 starch wastewater treatment method of the present invention

[0067] After filtering starchy sewage, samples were taken for water quality analysis, and the analysis results were COD: 6583mg / L, BOD5 4354mg / L, NH4 + 58.4mg / L, protein 1932mg / L, carbohydrate 5089mg / L, pH6.01.

[0068] 1. Processing method

[0069] Such as figure 1 The process flow chart shown:

[0070] (1) Take starch wastewater and process it through a grid with a gap of 8mm;

[0071] (2) Take 1000ml of filtered starch wastewater and put it in a beaker for later use. Quickly add the suspension A prepared in advance from 0.3g of spirulina powder and 1ml of water into the beaker filled with wastewater, stir and mix well; Check the pH, and the final pH is stable at 6.05. Use 3mol / L sodium hydroxide solution to adjust the pH to be stable at 7.86. Quickly mix the suspension B prepared in advance with 0.2g of feed grade dry yeast powder (brewer's yeast) and 2ml of water. Add it to the wastewat...

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Abstract

The invention discloses a treatment method for starch wastewater. The method comprises the steps of: (1) pretreatment: treating starch wastewater by a grid; (2) pulping: adding a suspension liquid A having a volume 0.0005-0.01 time that of the wastewater into wastewater treated in step (1), mixing the mixture evenly, adjusting pH to 6-8, then adding a suspension liquid B having a volume 0.002-0.006 time that of the mixture, and mixing the materials evenly; (3) flocculation: adding a suspension liquid C having a volume 0.005-0.04 time that of the wastewater into the wastewater treated in step (2), stirring the mixture evenly and conducting standing for 0.5-1.0h; and (4) filtration: subjecting the wastewater treated in step (3) to sedimentation, filtering the supernatant and precipitate respectively, and combining the filtrate. With simple technological steps, the treatment method for starch wastewater provided by the invention can effectively remove organic matters from the wastewater, can achieve low metal ion residue, and is environment friendly, thus having good application prospects.

Description

technical field [0001] The invention relates to a starch wastewater treatment method. Background technique [0002] Starch is a very important industrial raw material, which is widely used in food, medicine, chemical industry, papermaking and other fields. The wet milling process is currently the main starch preparation process, which produces a large amount of waste water. According to statistics, 8-20 tons of waste water will be generated for every ton of starch produced. The waste water mainly comes from the soaking and grinding of corn starch processing technology. , dehydration and drying processes. Starch wastewater is a kind of high-concentration organic wastewater. Its main components are protein, starch and fiber substances, and it also contains some amino acids and inorganic salts. Its COD value is high and it must be treated before it can be discharged. At present, starch factories mainly use anaerobic and aerobic systems to treat wastewater to meet discharge st...

Claims

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Application Information

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IPC IPC(8): C02F9/04A23K1/00A23K10/12
Inventor 杨军杨秋艳朱建德梁隆王利春沈鑫程志鹏
Owner SICHUAN KELUN PHARMA RES INST CO LTD
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