They use waste from the brewing industry for the manufacture of bricks
They use waste from the brewing industry for the manufacture of bricks
The construction bricks, both hollow and solid, are products of the ceramic industry, where the raw materials used mostly consist of wetted earth and clays, to which a small percentage of organic matter is added, approximately 2% by volume , with the aim of achieving certain properties during the drying process of the already formed raw material, and that after the process of calcination at high temperature generate the desired porosity in the material.
A group of researchers from the National Council of Scientific and Technical Research (CONICET) of the Center for Technology of Mineral Resources and Ceramics (CETMIC, CONICET-CIC) (Argentina), led by Dr. En Química Alberto Scian, principal investigator of CONICET and director of CETMIC, explains that: "We have scientists who investigate the properties of these materials and their behaviors, and another group that is dedicated to receiving services to third parties we do for the industry," explains the owner of the Center that is part of the Scientific and Technological Center (CCT) La Plata.
Usually in the brick industry is used as added organic matter both rice husk and paper pulp. These additives, despite being in a small percentage in the total formulation, contribute during the burn to add some calorific value to the system during its combustion. The mentioned organic matter can be replaced by others, as long as they do not affect the desired properties of the final product, so using bagasse from the brewing industry is another alternative to those commonly used.
They use waste from the brewing industry to make bricks. (Photo: Conicet)
Approximately 20% of the bagasse used by the brewing industry is sold for feed lot - livestock feed. "The rest must be seized, it must have added value. The bagasse is sold cheaper than the rice husk and win the CONICET, the beer industry and the brick industry, "says Scian who through the CETMIC approached the Chamber of Manufacturers of Red Bricks, of which more than 80% of the brickmakers of the country are partners. Currently, after having satisfactorily passed the laboratory tests, the next step is to test the bagasse on an industrial scale in a brickyard.
The team led by Scian is integrated by the Industrial Engineer, technical manager of CETMIC and support staff (CPA) of CONICET, Martín Ducos, the graduate in Chemistry and CPA, Matías Gauna, the Doctor in Engineering and CPA, Matias Stabile, Dr. Anabella Mocciaro, postdoctoral fellow of CONICET and Y-TEC and those responsible for the Third Party Services Laboratory: the chemical technician, sociologist and CPA, Ernesto Moyas and the ceramics technician and CPA, Martiniano Picicco.
The Technological Linkage Management (GVT) of CONICET was connected to Cervecería y Maltería Quilmes in 2017 when the brewing company held the third edition of Technofair. For this, the GVT made a call, innovative ideas were presented from a technological perspective of different institutes and Quilmes made a selection.
The CETMIC proposal was to apply different High Level Technological Services (STAN) -the CONICET Technological Linking tool- to evaluate the incorporation of bagasse into the lands already used in production, execute the production of prototypes and technically evaluate the comparing them with the bricks made with rice husk.
It should be noted that adopting brickyard companies should implement in their plants the storage and dosage form for this new input, which should be evaluated according to the available spaces and technologies.
The benefits of using bagasse or paper pulp are that the availability of rice husk is seasonal and must be transported from the production areas (in our country, generally from the Mesopotamian coast) to the brick kilns, so the lightness of the product and the cost of transportation means that the plants located in Greater Buenos Aires and the Greater Buenos Aires area pay approximately $ 1,500 per ton.
As for the paper pulp, its price will depend on the availability of the same as it is also used to make recycled paper. On the other hand, the bagasse production of a brewing plant is much higher than the demands of organic matter of the brick industry, since an average plant produces approximately 500 tons per day of bricks, which would require 3600 tons per year of bagasse in base dry - a quantity much lower than that produced by a large brewery, which would ensure a continuity of supply.
In addition, bagasse discarded by the brewing industry already contains a lot of water, so that the total humidification of the mixture of land in the production would be contributed by the bagasse, requiring a lower consumption of water of moistening.
"Given the price of rice husk, the beer company could take a greater economic return on its sale than it currently obtains from the sale for animal feed. The brewing multinational, AB InBev owns 5 plants in the country near urban centers, and there will always be a construction brick industry relatively close to these breweries, "explains Scian. (Source: CONICET / DICYT)
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