JP2012165729A - Method for changing rice-washed water into feed raw material, and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system which is necessary for making use of rice-washed water as a feed raw material through a system, which has functions, that is, thickening and recovery, concentration, sterilization, pH adjustment, storage, homogenization, and forced discharging, and keeps the quality of the feed raw material stable even if the material concerned is stored at 25°C for 7 days, the rice-washed water being discharged and treated for purification in large quantities in a rice-polishing factory, a rice-cooking factory, a flour-milling factory, a brewery and so on.SOLUTION: The system includes: a device which obtains rice-washed water, whose solid content is at least 8%, by adding 10-20% of water to 1 kg of rice when the rice is washed; and a device which obtains thick rice-washed water, whose solid content is 10-20%, by a subsequent solid-liquid separating operation, the processing ability of the device concerned being at least 200 liter/hour. In a heat sterilization mechanism in the next process, the number of soil-derived general bacteria, fungi and E. coli, which each stick to raw-material rice, is reduced at least to half of the number immediately after recovery by warming the rice-washed water at 60-100°C for 10-60 seconds.

Description

  The present invention relates to a method and apparatus necessary for preparing and using as a good feed raw material washed rice water that has been discharged and purified in large quantities in a rice mill, rice cooking factory, flour mill, brewery factory, and the like.

  Conventionally, there is a technique for discharging rice washing water having a solid content concentration of 8% at the time of washing the rice (see, for example, Patent Document 1). However, the recovered washed rice water is diluted with water and subjected to wastewater treatment. Washed rice water of the same concentration has sufficient nutritional value as a feed ingredient and is known to contain many functional ingredients such as vitamins and minerals. It was expected to be used as a resource.

  Japanese Patent No. 4239147

  In order to use rice-washed water as a feed ingredient, it was necessary to keep the freshness by suppressing spoilage caused by soil-derived bacteria attached to the rice, and at the same time, it was necessary to minimize the transportation cost by increasing the solid content concentration .

  In order to solve the above-mentioned problems, the present invention has been intensively studied and completed by a combination of heat sterilization and formic acid addition and a solid-liquid separation method.

Concentrated recovery, concentration, sterilization, pH adjustment, storage, and homogeneity necessary to use washed rice water that has been discharged and purified in large quantities at rice mills, rice mills, mills, breweries, etc. as feed ingredients This is a feed raw material method combining processes such as composting and forced discharge, and an apparatus system having these functions, and includes the following methods and apparatuses.
A system equipped with a device for adding 10% to 20% of water to 1 kg of rice to obtain washed rice water having a solid concentration of 8% or more. And the system provided with the apparatus of the processing capacity of 200 liters / hour or more which obtains the concentrated washing | cleaning rice water of 10%-20% of solid content by subsequent solid-liquid separation operation.
In the heat sterilization mechanism of the next step, by heating for 10 to 60 seconds in a temperature range of 60 to 100 ° C., half of the number of general bacteria, fungi and coliform bacteria derived from soil attached to the raw rice A system with devices that can be sterilized:
Further, formic acid (95% or more) is added in a weight ratio of 0.2% to 0.6% to the concentrated washed rice water subjected to the concentrated recovery and sterilization treatment, so that the pH is adjusted to 3.5 to 4.0. A system equipped with an automatic pH adjusting device that can maintain freshness in an area that does not reach the bacterial count level immediately after the washing and washing water recovery even if it is adjusted and stored at 25 ° C. for 7 days.

  According to the high-concentration recovery / freshness maintenance / storage system of rice-washed water enabled by the present invention, the rice-washed water that is currently disposed of in large quantities on a nationwide scale is concentrated and recovered, and has excellent nutritional value. It can be provided to livestock farmers as a high-quality domestically produced feedstock.

  In addition, conventionally, the washed rice water has a problem that deterioration occurs when left at 25 ° C. overnight. On the other hand, according to the freshness-keeping treatment of the present invention, the above-mentioned problems are solved, and at the same time, the solid content is reduced to about 20% to reduce the weight and greatly reduce the transportation cost. It is possible to maintain good quality as a feed material for 7 days at 25 ° C.

  It is explanatory drawing which shows the flow of the high concentration collection | recovery of rice washing water, freshness maintenance, and storage.

  The high-concentration recovery / freshness maintenance / storage system of the rice-washed water according to the present invention comprises a combination of devices having functions of concentration recovery, concentration, sterilization, pH adjustment, storage, homogenization, and forced discharge, which will be described later. Even if the water is stored at 25 ° C. for 7 days, the quality as a feed material can be maintained through these.

  A super water-saving rice washing device (1) is provided in the pre-process of the existing rice washing device, and the rice washing water having a solid content of 8% or more is separated and stored in the recovery tank (2). After the primary washing, the washed rice is rinsed with an existing rice washing apparatus (9) and transferred to the rice cooking process. The dilute rice water generated during the rinsing is sent to the existing septic tank (10) for purification. The primary washed rice water stored in the recovery tank (2) is dehydrated by the centrifugal solid-liquid separator (3), concentrated to about 20% solids, and continuously sterilized by the tube sterilizer (4). Is stored in the storage tank (5), but is homogenized by a forced discharge pump (also a circulating and mixing pump) (8), and a predetermined amount of liquefied enzyme is injected from the addition device (6) for the purpose of viscosity reduction. Formic acid is added from an automatic pH adjuster (7) to adjust to pH 3.5. By the above method, the concentrated and washed freshly-kneaded rice water is filled into the bulk transport container by the forced discharge pump (8), or is collected and transported to the on-vehicle tank by the suction mechanism of the tank truck.

  INDUSTRIAL APPLICABILITY The present invention can be used for collecting and maintaining freshness of washed rice water as a safe and good quality animal feed material.

DESCRIPTION OF SYMBOLS 1 Super water-saving rice washing device 2 Primary washing water recovery tank 3 Centrifugal solid-liquid separation device 4 Tube type heat sterilization device 5 20% concentration and sterilization washing water storage tank 6 Liquefaction enzyme addition device 7 pH automatic adjustment device 8 Forced discharge pump (Cum circulation mixing pump)
9 Existing rice washing device 10 Existing septic tank

Claims (4)

  Concentrated recovery, concentration, sterilization, pH adjustment, storage, and homogeneity necessary to use washed rice water that has been discharged and purified in large quantities at rice mills, rice mills, mills, breweries, etc. as feed ingredients Feed raw material method combining processes such as composting and forced discharge, and an apparatus system having these functions.   A system equipped with a device for adding 10% to 20% of water to 1 kg of rice to obtain washed rice water having a solid concentration of 8% or more. And the system provided with the apparatus of the processing capacity of 200 liters / hour or more which obtains the concentrated washing | cleaning rice water of 10%-20% of solid content by subsequent solid-liquid separation operation.   In the heat sterilization mechanism of the next step, by heating for 10 to 60 seconds in a temperature range of 60 to 100 ° C., half of the number of general bacteria, fungi and coliform bacteria derived from soil attached to the raw rice A system with devices that can be sterilized:   Further, formic acid (95% or more) is added in a weight ratio of 0.2% to 0.6% to the concentrated washed rice water subjected to the concentrated recovery and sterilization treatment, so that the pH is adjusted to 3.5 to 4.0. A system equipped with an automatic pH adjusting device that can maintain freshness in an area that does not reach the bacterial count level immediately after the washing and washing water recovery even if it is adjusted and stored at 25 ° C. for 7 days.

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