introduction:
Considering the high consumption of water in dairy factories and approaching the summer season and the problem of dehydration in the country, I am sharing with you the following article from the website of water consumption management and promotion of water efficiency and the secretariat of the national working group for adapting to dehydration.
Water consumption reduction project in Kale Amel dairy factory
The ever-increasing growth of the world’s population and the reduction of water per capita, the increase in urbanization and the development of industry and the reduction of renewable water resources, etc., have increased the attention of human society to the category of water consumption management and its optimal use. In addition to reducing the probability of drought in the future, the optimal management of water consumption also reduces energy consumption in many sectors.
Goals :
The purpose of the water consumption reduction project in Kale dairy factory is to study water consumption management, identify and introduce suitable methods to reduce consumption and optimal use of water in all parts of the factory. On the other hand, by implementing the suggested methods, water consumption can be reduced. In this article, optimization of water consumption in Kale Amol dairy factory and methods of reducing water consumption will be considered. Also, a comparison has been made with other countries of the world regarding the amount of optimal water consumption.
The amount of water consumption in the world’s dairy factories
In dairy factories, the amount of water used mainly depends on the following factors.
The volume of milk entering the factory: the larger the volume of milk received by the factory, it indicates the production of more products and, as a result, increases water consumption. On the other hand, with the increase in production in a certain factory, the percentage of water used in the inlet valve usually decreases.
Type of product: Obviously, due to the difference in the production process of different dairy products, the volume and quality of water used will be different.
Management ways to save water consumption:
Insulation that reduces steam condensation.
Condensate return system
Circulating water for pumps, vacuums and homogenizers
Optimizing and automating the equipment washing process
Also, basic projects were carried out in order to reduce water consumption or reuse water, which are described in detail below.
Purification and return of milk condensate from the condensing unit:
On average, 90% of the volume of skimmed milk consists of water, and the rest consists of dry matter, including calcium, protein, etc. In the milk powder production process, the milk is first transferred to the evaporator, where about one third of its water is removed. This is important for two reasons. First, the tap water evaporates at a low enough temperature, which does not damage the tap. And second, it reduces significant costs. Due to the absence of solvents in the condensate of this steam, the steam condensate created in this step is sent after a purification step to be used in steam boilers to generate steam.
Reuse of purified sewage water for washing recycling halls and green spaces:
Every day, a certain amount of returned products and waste and unusable containers are transferred to the recycling department of the Kale dairy factory in order to reuse and help preserve the environment, which are used in other raw materials that need to be cleaned and prepared. be placed Also, these toy products are used in the production of containers and cups in other products.
The advantage of reusing washing water is to use this:
Water is recycled in the washing of non-sterile parts of the factory complex, including in the primary washing part of the hall. Therefore, due to the high quality of the water coming out of the wastewater treatment plant of the complex, it is possible to reuse it for this purpose. Irrigation of green spaces is another reuse of wastewater and return water that is being done in Kale Amol complex. The use of purified water in these parts has reduced 500 cubic meters of water per day.
Collecting water from CIP washing steps and reusing it
A typical CIP cycle includes the following steps:
The initial washing is done by WFI (water for injection) or PW (purified water) to wet the inner surface of the tank and remove the remaining materials.
Washing with caustic soda solution
Mild and moderate washing again by WFI or PW
Washing with acid solution – is done to remove protein residues or mineral deposits.
The final washing with WFI or PW is done to remove the remaining substances and cleaning solutions from the device.
