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A treatment process for high-concentration pectin wastewater

A treatment process and pectin wastewater technology, which is applied in the direction of food industry wastewater treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of affecting the treatment effect, high viscosity of pectin wastewater, high power consumption, etc., to improve safety and Stability, recovery and recycling, and the effect of reducing the viscosity of wastewater

Inactive Publication Date: 2017-04-12
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air flotation method has high power consumption, high pectin moisture content, and poor separation effect
The precipitation method not only takes a long time to settle and the treatment effect is poor, but also because of the light density of pectin, it often floats on the water surface and crusts, which seriously affects the subsequent treatment effect.
However, when the pectin wastewater is treated by the filter press method, the filter press effect is extremely unsatisfactory due to the high viscosity of the pectin wastewater.

Method used

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  • A treatment process for high-concentration pectin wastewater
  • A treatment process for high-concentration pectin wastewater
  • A treatment process for high-concentration pectin wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A process for treating high-concentration pectin waste water of the present invention comprises the following steps: drawing out the alkali-soaked water produced in the canned citrus fruit production process, first filtering the alkali-soaked water with multi-layer (usually 3 to 5 layers) gauze, That is, the water sample is pretreated, and then the composite flocculant is added to the filtered alkali immersion water and stirred at 30rpm for 10min, and then the solid-liquid separation is carried out by centrifugation at a centrifugal speed of 4000rpm and a centrifugation time of 10min to complete the treatment process.

[0031] In this embodiment, the experimental reagents and their concentrations are: CaO (5 g / L), CPAM (1 g / L).

[0032] In the present embodiment, each 30mL (comprising the control group) of the alkaline immersion water sample after getting 4 groups of filtrations, adds reagent respectively by the requirement in Table 2, and experimental phenomenon is as T...

Embodiment 2

[0039]A process for treating high-concentration pectin waste water of the present invention comprises the following steps: drawing out the alkali-soaked water produced in the canned citrus fruit production process, first filtering the alkali-soaked water with multi-layer (usually 3 to 5 layers) gauze, That is, the water sample is pretreated, and then the composite flocculant is added to the filtered alkali immersion water, stirred at 30rpm for 10min, and then solid-liquid separation is carried out by centrifugation at a centrifugal speed of 4000rpm and a centrifugation time of 10min to complete the treatment process.

[0040] In this embodiment, the experimental reagent and its concentration are: CaCl 2 (5g / L), CPAM (1g / L).

[0041] In the present embodiment, get each 30mL (comprising control group) of the alkaline immersion water sample after getting 4 groups of filtrations, add reagent by the requirement in Table 4 respectively, experimental phenomenon is as Table 4 and fig...

Embodiment 3

[0060] A process for treating high-concentration pectin wastewater of the present invention investigates the effect of solid-liquid separation on alkali immersion treatment. The treatment process includes the following steps: lead out the alkali soaking water produced in the production process of canned citrus, first filter the alkali soaking water with three layers of gauze, then add a composite flocculant into the filtered alkali soaking water, and stir at 30 rpm for 10 minutes , and then complete the treatment process with different solid-liquid separation methods.

[0061] In this embodiment, the composite flocculant is specifically 8mL CaO+1mLCPAM, wherein CPAM (1g / L), Al 2 (SO 4 ) 3 (2g / L).

[0062] In this example, in order to compare the effects of different solid-liquid separation methods on the effect of alkali immersion water treatment, 4 groups of experiments were carried out, each taking 30 mL of water samples after mixing evenly, and the 4 groups of water samp...

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Abstract

The invention discloses process for treating high-concentration pectin wastewater. The process comprises the following steps: leading out alkali leached water generated during production of orange cans, adding a composite flocculant into the alkali leached water, stirring, and carrying out solid-liquid separation centrifugally so as to complete the treatment process, wherein the composite flocculant is composed of an inorganic additive and an organic polymer flocculant, the inorganic additive is CaCl2 and / or CaO, the organic polymer flocculant is a cationic polyacrylamide, dimethyl diallyl ammonium chloride and acrylamide copolymer and / or a cationic dicyandiamide and formaldehyde polycondensate. The process disclosed by the invention is good in treatment effect and low in operation cost and is stable.

Description

technical field [0001] The invention relates to a treatment process of pectin wastewater, in particular to a treatment process of high-concentration pectin wastewater in citrus canning processing. Background technique [0002] After in-depth investigations in many places, due to the characteristics of their own production processes, citrus canned processing enterprises will discharge sewage of different water quality in each production process. Among them, the waste water with high pectin concentration mainly comes from acid immersion water, alkali treatment water, alkali The pectin concentration can reach 5000mg / L in the first rinsing water after soaking, the floor rinsing water in peeling workshops with high COD concentration, fruit scalding water, the second washing water after alkali soaking, and pot washing water. Due to the presence of pectin, the wastewater will be viscous and the chemical coagulation effect will be greatly reduced, which will bring great difficulties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F103/32
Inventor 余关龙张波陈宏杜春艳罗松柏胡世雄孙士权聂小宝
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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