CN-122012265-A - Method for dehydrating citrus processing waste and application of dehydrated liquid

Abstract

Aiming at the problem of utilization of series of feeds caused by high moisture content of fruit and vegetable processing wastes such as oranges, the invention provides a dehydrating agent which comprises main components and secondary components, wherein the main components comprise one or more of citric acid, sodium bicarbonate, sodium carbonate and quicklime, the secondary components comprise pectase, cellulase and xylanase, the composition ratio of the main components is 1:1-5, the composition ratio of the secondary components is 1:1-5, and the ratio of the main components to the secondary components is 1:0.02-0.5. Simultaneously, a low-cost physicochemical dehydration method and a method for recycling the extracted liquid are also provided. The invention not only solves the problems of easy deterioration, high transportation cost and difficult crushing and processing of the fruit and vegetable processing wastes such as the citrus, but also changes waste into valuables, applies the extracted liquid to the culture of microorganisms and the generation and accumulation of high-value metabolites thereof, realizes the omnibearing resource utilization of the citrus processing wastes, and is beneficial to realizing the 'grain preservation technology' and the 'omnibearing multi-way development of food resources'.

Inventors

• GUAN XIAOFENG
• XIE YUEWEI
• LIU ZUOHUA
• QI RENLI
• ZHONG XIAOXIA
• HAN KAI
• YAO YANCHU
• LIU ZHIYUN
• ZHOU XIAORONG
• YANG FEIYUN
• HUANG JINXIU

Assignees

• 重庆市畜牧科学院

Dates

Publication Date

20260512

Application Date

20250919

Claims (9)

1. 1. A dehydrating agent comprises a main component and a secondary component, wherein the main component is citric acid, sodium bicarbonate, sodium carbonate and quicklime, the secondary component is one or more of pectase, cellulase and xylanase, the composition ratio of the main component is 1:1-5, the composition ratio of the secondary component is 1:1-5, and the ratio of the main component to the secondary component is 1:0.02-0.5.
2. 2. Use of the dewatering agent of claim 1 in citrus waste treatment.
3. 3. The method for using the dehydrating agent according to claim 1, wherein when the citrus waste contains a large amount of citrus peel and tubers are more than or equal to 3cm, the citrus peel and the tubers are crushed to be less than or equal to 1cm, the dehydrating agent with the concentration of 0.60-0.86% (W/W) is uniformly mixed with the citrus processing waste, the mixture is kept stand for 18-24 h at a temperature lower than 40 ℃, and the mixture is centrifuged for 5-10 min at 2000r/min to separate solid from liquid, wherein the liquid is a separated liquid, and the solid is dehydrated citrus processing waste.
4. 4. A citrus waste extract prepared by the method of claim 3.
5. 5. Use of the extract according to claim 4 for the cultivation of microorganisms.
6. 6. Use of the exudate according to claim 4 in the cultivation of microorganisms including but not limited to lactic acid bacteria, bacillus and yeasts.
7. 7. A microorganism culture solution comprising 500ml/L of the extract of claim 4, 10g/L of peptone, 0-10.5 g/L of ammonium sulfate, adding water to a total volume of 1L, and adjusting pH to 5.5-7.4 with sodium hydroxide.
8. 8. The culture solution according to claim 7, wherein the culture solution comprises 500mL of a stripping solution, 10g g/L of peptone, 1.0-3.0 g/L of ammonium sulfate, 0.2-g/L of magnesium sulfate, 0.04-g/L of manganese sulfate, water for adjusting the total volume to 1L, pH to 5.5-5.9, and the microorganism is lactobacillus, or comprises 500mL/L of a stripping solution, 10-g/L of peptone, 0-2.0 g/L of ammonium sulfate, 5.0-g/L of sodium chloride, water for adjusting the total volume to 1L, pH to 7.0-7.4, and the microorganism is bacillus, or comprises 500-mL/L of a stripping solution, 10-g/L of peptone, 8.5-10.5 g of ammonium sulfate, water for adjusting the total volume to 1L, pH to 6.3-6.7, and the microorganism is saccharomycetes.
9. 9. The culture solution according to claim 7 or 8, wherein the culture solution is sterilized at 121 ℃ for 15min, cooled to room temperature, and inoculated with 2% of secondary seed solution of the strain according to the volume of the culture solution, wherein lactobacillus is subjected to stationary culture at 37 ℃, bacillus is subjected to culture at 37 ℃ and 220r/min, and saccharomycete is subjected to culture at 30 ℃ and 220 r/min.

Description

Method for dehydrating citrus processing waste and application of dehydrated liquid Technical Field The invention relates to biological resource recycling, in particular to disposal and recycling of citrus processing waste. Technical Field In recent decades, citrus yields have risen from 3617.53 to 6791.49 tens of thousands of tons in our country, with the citrus yields rising continuously, wherein about 30% of the citrus is used for deep processing each year, producing a large amount of citrus processing waste. Because citrus is ripe and the processing time is concentrated, the processing waste has strong seasonality, high moisture content, easy putrefaction and inconvenient transportation, is frequently discarded nearby by a processing factory or is buried as agricultural garbage, not only causes the waste of resources, but also easily causes soil pollution and ecological unbalance. The citrus processing waste has high content of soluble sugar, pectin and other sugar substances, and the microorganism can be used for growth and propagation and generation and accumulation of beneficial products such as biological enzymes, biological proteins and the like by taking the sugar substances as carbon sources, so that the citrus processing waste can be developed into an unconventional feed raw material, the ratio of the raw material of the bulk feed is reduced, the balance of feed grain supply and demand is ensured, and the ecological pressure is relieved. The primary problems to be solved in the feed utilization of the citrus processing waste are the problems of difficult storage, difficult processing and high transportation cost caused by high moisture content. At present, the modes for reducing the moisture content of the high-moisture raw material mainly comprise two modes of mechanical pressing and heat source drying. However, citrus processing waste is essentially a mechanically pressed product and is difficult to re-dewater by mechanical pressure. In addition, sugar and pectic substances in the citrus processing waste enable plant tissue cells to be bonded together, so that the plant tissue cells are easy to agglomerate and agglomerate, the energy consumption cost is high during drying, and the conditions of external coke and internal humidity are easy to occur. Disclosure of Invention The invention provides a low-cost physicochemical dehydration method and a method for recycling the extracted liquid thereof, aiming at the difficult problem of recycling the series of feeds caused by high moisture content of fruit and vegetable processing wastes such as citrus. The physicochemical dehydration mode provided by the invention aims at solving the problems that fruit and vegetable processing wastes such as citrus are easy to rot and deteriorate, the transportation cost is high and the crushing processing is difficult. The aim of the invention is achieved by the following measures: a dehydrating agent comprises a main component and a secondary component, wherein the main component is citric acid, sodium bicarbonate, sodium carbonate and quicklime, the secondary component is one or more of pectase, cellulase and xylanase, the composition ratio of the main component is 1:1-5, the composition ratio of the secondary component is 1:1-5, and the ratio of the main component to the secondary component is 1:0.02-0.5. The application of the dehydrating agent in treating fruit and vegetable processing wastes such as citrus is provided. The use method of the dehydrating agent comprises the steps of when a great amount of citrus peels are contained in citrus processing waste, the tubers are more than or equal to 3cm, the citrus peels are required to be crushed into the tubers which are less than or equal to 1cm, uniformly mixing 0.6-0.86% (W/W) of dehydrating agent with the citrus processing waste, standing for reaction for 18-24 h at a temperature lower than 40 ℃, centrifuging for 5-10 min at 2000r/min, and separating solid from liquid, wherein the liquid is a separated liquid, and the solid is dehydrated citrus processing waste. Preferably, the container used for standing reaction of the citrus processing waste and the dehydrating reagent is a container with smooth inner wall and a liquid outlet, so that the discharged liquid can be conveniently discharged and collected during the reaction. After the dehydration reaction, a filtration type centrifuge and a decanter type centrifuge can be used as the centrifugal apparatus. When the granularity of the tubers is 2mm and less than or equal to 1cm, a filtering type centrifugal machine can be used for solid-liquid separation, and the mesh number of the filter cloth is more than or equal to 80 meshes. When the granularity of the tubers of the materials is less than or equal to 2mm or the reacted materials are further crushed to the granularity of less than or equal to 2mm, a sedimentation type centrifuge can be used for solid-liquid separation. The citrus processing waste is waste