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Method for treating sweet potato wastewater

A treatment method and wastewater technology, which is applied in food industry wastewater treatment, water/sewage treatment, light water/sewage treatment, etc., can solve the problems of few treatment processes, poor treatment effect, high cost, etc., to achieve Save processing time, high disinfection efficacy, sufficient decomposition effect

Pending Publication Date: 2021-12-31
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex composition of potato wastewater, there are only a handful of treatment processes available for effective treatment of potato wastewater, and the treatment effect is not good, the cost is high, and the discharge is not up to standard

Method used

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  • Method for treating sweet potato wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see figure 1 , a processing method of sweet potato wastewater, it comprises the steps:

[0033] S1: Slowly add sodium hydroxide powder while stirring in the potato wastewater to adjust the pH value of the potato wastewater to 8;

[0034] S2: Slowly add polyaluminum chloride powder with a purity of more than 90% while stirring in the potato wastewater treated in step S1, and continue stirring for 1 hour. The mass ratio of polyaluminum chloride to potato wastewater is 1:10000;

[0035] S3: Slowly add hydrogen peroxide solution with a concentration of 30% to the potato wastewater treated in step S2 while stirring, the mass ratio of hydrogen peroxide to potato wastewater is 1:40000, and then place it in the sun for exposure Or irradiate with an ultraviolet light source with a wavelength less than 380nm and keep stirring for more than 2 hours;

[0036] S4: slowly add cationic polyacrylamide to the potato wastewater treated in step S3 while stirring, and continue stirring f...

Embodiment 2

[0040] see figure 1 , a processing method of sweet potato wastewater, it comprises the steps:

[0041] S1: Slowly add sodium hydroxide powder while stirring in the potato wastewater to adjust the pH value of the potato wastewater to 8;

[0042] S2: Slowly add polyaluminum chloride powder with a purity of more than 90% while stirring in the potato wastewater treated in step S1, and continue stirring for 1 hour. The mass ratio of polyaluminum chloride to potato wastewater is 1:5000;

[0043] S3: Slowly add hydrogen peroxide solution with a concentration of 30% to the potato wastewater treated in step S2 while stirring, the mass ratio of hydrogen peroxide to potato wastewater is 1:40000, and then place it in the sun for exposure Or irradiated by an ultraviolet light source with a wavelength less than 380nm and continuously stirred for more than 2 hours;

[0044] S4: slowly add cationic polyacrylamide to the potato wastewater treated in step S3 while stirring, and continue stirr...

Embodiment 3

[0048] see figure 1 , a processing method of sweet potato wastewater, it comprises the steps:

[0049] S1: Slowly add sodium hydroxide powder while stirring in the potato wastewater to adjust the pH value of the potato wastewater to 9;

[0050] S2: Slowly add polyaluminum chloride powder with a purity of more than 90% while stirring in the potato wastewater treated in step S1, and the mass ratio of polyaluminum chloride to potato wastewater is 1:10000;

[0051] S3: Slowly add hydrogen peroxide solution with a concentration of 30% to the potato wastewater treated in step S2 while stirring, the mass ratio of hydrogen peroxide to potato wastewater is: 1:80000, and then place it under sunlight exposure Or irradiate with an ultraviolet light source with a wavelength less than 380nm, and keep stirring for more than 2 hours;

[0052] S4: Slowly add polyacrylamide and chitosan group (3:1) to the potato wastewater treated in step S3 while stirring, and keep stirring for 3 hours, then...

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Abstract

The invention relates to a method for treating sweet potato wastewater, which comprises the following steps: alkalifying sweet potato wastewater with sodium hydroxide, adding a flocculant polyaluminum chloride powder, stirring, adding a hydrogen peroxide solution, stirring, carrying out disinfection and sterilization on the wastewater by ozone generated by mass decomposition of hydrogen peroxide under the irradiation of ultraviolet light in sunlight or artificial ultraviolet light, inhibiting further mildewing and fermentation of the waste water and the waste residues, then adding polymer powder, stirring to form a flocculated state, adding pulverized coal, stirring and dispersing to accelerate flocculating settling, and compressing the volume of a precipitate. The technical scheme is adopted, so that disinfection and sterilization can be synchronously performed in the settling and purifying process of the waste water, and mildewing and fermentation of the waste water and the waste residues are inhibited; the traditional long-time precipitation treatment is not needed, the flocculent precipitation volume is not compressed, and the flocculent mud volume is reduced by 1 / 3.

Description

technical field [0001] The invention relates to the field of sewage purification and treatment, in particular to a treatment method for sweet potato wastewater. Background technique [0002] Yam, generally refers to sweet potato, also known as sweet potato, sweet potato, red potato, golden potato, fanru, red yam, jade pillow potato, cute sweet potato, etc. It is an annual herbaceous plant with round, oval or spindle-shaped roots in the underground part. It is a high-yield and adaptable food crop closely related to agricultural production and people's life. In addition to being used as staple food, its roots are also used in food processing , starch and alcohol manufacturing industry is an important raw material. However, the industrial and agricultural processing of sweet potatoes requires a lot of water, and usually produces a large amount of sweet potato wastewater. After a long time, the color of the wastewater will become darker and the smell will be foul. The organic s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F101/16C02F103/32
CPCC02F9/00C02F1/66C02F1/5236C02F1/32C02F2001/007C02F1/56C02F1/50C02F2303/04C02F2103/32C02F2101/16
Inventor 李忠水伍晖向宇轩叶影郑少安
Owner FUJIAN NORMAL UNIV
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