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A kind of pectin dephosphorization agent prepared by utilizing waste water from orange petal decapsulation and its preparation method

A technology for removing a gel phosphorus remover and a capsule coat is applied in the field of pectin phosphorus remover and its preparation, and can solve the problems of low economical efficiency of ethanol precipitation and salting out, environmental pollution not to be underestimated, and hindering filtration, etc., so as to reduce the concentration difference. Polarization effect, good effect, prevent rapid pollution effect

Active Publication Date: 2022-03-18
QUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the problem of low pectin concentration in wastewater has been solved, membrane fouling is the key to the successful application of various membranes, and the gel layer of pectin will seriously hinder filtration and cause membrane fouling
In addition, the economy of ethanol precipitation and salting out is low, and the environmental pollution cannot be underestimated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. A method for preparing pectin dephosphorization agent by utilizing waste water from peeling off capsules of orange petals as a resource, is characterized in that, comprising the following steps:

[0033] A, filter and purify, filter the waste water of orange petal decapsulation, remove impurity, obtain pretreatment liquid, filter and adopt coarse filter and fine filter twice to filter, and wherein coarse filter adopts the filter screen or the fine grid that aperture is 2-3mm, The fine filter is processed by a quartz sand mechanical filter.

[0034] B. Separation of pectin, deacidification and dealkalization of the pretreatment solution to obtain a pectin solution, and recovery of dilute acid and recovery of dilute alkali. The pretreatment solution uses tap water as the absorption solution, and uses cationic dialysis membranes and anion dialysis membranes respectively. The acidic stripping solution and the alkaline stripping solution are used for deacidification and d...

Embodiment 2

[0043] The acidic and alkaline waste water from orange petal decapsulation is treated by 3mm fine grid and 10μm filtration precision quartz sand mechanical filter respectively. The filtered filtrate uses cationic and anionic dialysis membranes to recover acid and alkali dilute solution respectively, and tap water is used as absorbent. The flow velocity on the membrane surface is 0.1m / s, and the wastewater circulates and the absorbent circulates until the conductivity of the two is basically equal.

[0044] Mix the pretreated acidic pectin solution and alkaline pectin solution, and adjust the pH to 7.0. 36% HCHO solution was added to the mixture, the mixing ratio was 1:1, and the mixture was reacted for 3 hours at a temperature of 50° C. and a stirring speed of 30 r / min. Then add vinyl amide with 2 times the weight of the pectin solution, ammonium persulfate is used as the polymerization initiator, the amount of ammonium persulfate is maintained at a mass ratio of 1:10 with the...

Embodiment 3

[0047] The acidic and alkaline waste water from orange petal decapsulation are treated with 1mm fine grid respectively, and the filtered filtrate is respectively recovered acid-base dilute solution by cationic and anionic dialysis membranes, tap water is used as absorbent, and the membrane surface flow rate is 0.1m / s, and the waste water The circulation and the absorbent circulate until the conductivity of the two is substantially equal.

[0048] Mix the pretreated acidic pectin solution and alkaline pectin solution, and adjust the pH to 7.0. 36% HCHO solution was added to the mixture, the mixing ratio was 1:1, and the mixture was reacted for 3 hours at a temperature of 50° C. and a stirring speed of 30 r / min. Then add the mixture of vinylamide and vinylimidazole, the mixing ratio is 1:1, the mass ratio of total mass to pectin is 2:1, ammonium persulfate is used as the polymerization initiator, and the dosage is maintained at 1:10 with the mass ratio of pectin, nitrogen Under...

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Abstract

The invention belongs to the technical field of comprehensive utilization of waste water, and relates to a pectin dephosphorization agent and a preparation method prepared by utilizing the waste water from orange petal decapsulation as resources. The method comprises the following steps: A, filtering and purifying, filtering the waste water from orange petal decapsulation, removing impurities to obtain a pretreatment solution, B, separating pectin, performing deacidification and dealkali treatment on the pretreatment solution to obtain a pectin solution, and recovering Dilute acid and recover dilute alkali, C, pectin alkylation, add aldehyde to pectin solution, carry out aldol condensation reaction, obtain alkylated pectin solution, D, pectin surface grafting, after completing step C , Add vinyl monomer and catalyst to carry out polymerization reaction, E, concentrate and dry to get pectin phosphorus removal agent. The phosphorus removal agent of the invention has good effect and is easy to biodegrade, and the precipitated sludge in the phosphorus removal process can be used as an organic phosphorus fertilizer.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of waste water, and relates to a pectin dephosphorization agent and a preparation method prepared by utilizing the waste water from orange petal decapsulation as resources. Background technique [0002] China is the world's largest producer of citrus. During the 12th Five-Year Plan period, my country's citrus cultivation area and annual output have increased significantly, and it ranked first in the world in 2012. The country's citrus planting area reached 34.32 million mu, with a total output of more than 33 million. Ton. In addition to being eaten as a favorite fruit for consumers, citrus is processed into a large number of products such as citrus juice, citrus wine, and canned orange petals. With the development of science and technology, my country’s citrus production technology and equipment have reached the international advanced level. The world’s canned citrus 80% of the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/06C02F9/10C08F251/00C08F220/54C08F226/06C08F220/50C02F103/32
CPCC02F9/00C08B37/0048C08F251/00C02F2303/14C02F2301/08C02F2301/046C02F2103/32C02F2209/05C02F1/444C02F1/44C02F1/12C02F1/001C08F220/54C08F226/06C08F220/50
Inventor 曾惠明沈晓莉吕亮
Owner QUZHOU UNIV
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