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In recent years, the manufacturing processes of products based on wheat cereals, have been in progress regarding the endowment with performant machines, equipment and installations. The quality of the bakery products can be influenced by a number of parameters such as: the physical characteristics of the bakery flour, the production process, the kneading rate, the kneading and the baking time. This paper presents the influence of the kneading rate on the structure of the wheat flour dough through the results obtained during of some experimental researches. [ABSTRACT FROM AUTHOR]

Mainly, in this paper are presented some aspects regarding the construction and working process of vacuum trucks for sewer channels unclogging. There are presented general component parts of these machines, the cleaning diagram with working process describing, calculus of the centrifugal pump flow rate for cleaning pressure and driving power, pressure regulator of the cleaning equipment and a few types of nozzles used for cleaning and washing sewers and pipes. [ABSTRACT FROM AUTHOR]

Nowadays, the destruction and pollution of our environment has produced a growing awareness worldwide of the need for more effective wastewater treatment. Sedimentation is the oldest and most widely used unit operation in water and wastewater treatments. Sedimentation is the process of removing solid particles heavier than water by gravity settling. The terms sedimentation, settling, and clarification are used interchangeably. The unit sedimentation basin may also be referred to as a sedimentation tank, clarifier, settling basin, or settling tank. In wastewater treatment, sedimentation is used to remove both inorganic and organic materials which are settleable in continuous-flow conditions. This paper presents the results obtained in some research focused on wastewater decanting processes using different constructive variants of settling tanks. [ABSTRACT FROM AUTHOR]

This paper presents some aspects regarding construction and working process of the press wheel of agricultural machinery for planting and seeding, particularly with examples at the miscanthus planters. Also, there are presented some theoretical elements concerning the working process of these working bodies of the agricultural machinery, regarding rolling resistance, the level of compaction and to estimate the compaction depth achieved by the press wheel. These parameters express the working indices of press wheels, necessary to achieve a contact between seeds, rhizomes or planting material and the soil around it, in order to obtain a good germination and the formation of roots adequate for sprouting and vegetation. Further, is presented a finite element analysis for press wheel and its support for a stable position during the working process, for a normal push of the wheel on the soil. [ABSTRACT FROM AUTHOR]

Vegetable oil industry is one of the most important industries in the world, due to the large number of uses of vegetable oil in different fields. Thus, the vegetable oil obtaining from oilseeds, it is a very important operation in the industry. The most common methods of obtaining oil are mechanical pressing and solvent extraction, from which the mechanical pressing operation presenting several important advantages. This led to intensive study of pressing process and more specifically to the study of factors that influence the efficiency of the press, characterized in especially by the recovered oil from the oleaginous material. In this study it is presented a mathematical model of oil extraction process using a screw press obtained by dimensional analysis. The mathematical model it is validated by the experimental data obtained at sunflower seeds pressing with a screw press, using regression analysis. [ABSTRACT FROM AUTHOR]

Due to the inevitable depletion of fossil fuels and the increased energy requirements caused by the rapid growth of the population in the last 50 years, it was necessary to find alternative sources of energy. One of the most important alternative sources of energy is biomass (wood, straws, sawdust, husk, branches, etc.). The main disadvantage of raw biomass is that it has very low density, which leads to difficulties in the process of handling, transport, storage. These drawbacks can be improved by compacting (densifying) biomass at very high pressures, thus obtaining solid biofuels with a uniform structure and humidity, such as pellets. The paper presents a series of experimental researches conducted on several types of compacted biomass in the form of pellets, to assess the possibility to efficiently use secondary products from agriculture (husk, cobs, straws, even alfalfa and rapeseed that are unsuitable for animal consumption) to produce high quality biofuels. [ABSTRACT FROM AUTHOR]

Granulation is a technological operation widely used in many industries, aiming the controlled increase of the dimensions of particle formations, providing an internal structure and some mechanical characteristics required for the external surface, density, compactness, porosity, etc. Biomass, in its original form, is difficult to be successfully used as fuel because it is bulky, wet and dispersed. The densification of biomass represents the conversion technologies of plant residues into fuel. These technologies are known as pelletizing, briquetting or agglomerating, and improve the handling characteristics of products for a better transport, storage, etc. [ABSTRACT FROM AUTHOR]

In the construction of precision seeders, different types of seed-metering devices are used, which differ both from a constructive point of view and also from the point of view of the principle of distribution. This paper presents the factors influencing the seeding precision of seeders for weeding plants, as well as the forces acting on the discharge of seeds in the distribution process of precision seeders. [ABSTRACT FROM AUTHOR]

Burning is the oldest and most used technology for obtaining the energy in form of heat. The biomass can be burned directly (as is burnt the wood for heating or the waste incineration) or can be burned simultaneously with the coal (co-burning). The briquettes are obtained by pressing the sawdust mixed with chips, tree branches or shells by means of a piston or screw press. A unique alternative to achieve of fossil fuel in the form of briquettes for the Romanian space is the cultivation of the plant called Miscanthus. This is a very high perennial herb (reaching 3.5 m at maturity), increasingly popular in Europe as a source of green energy. For the determination of caloric power was used a calorimetric system type CAL 2K. The experimental data resulted showed the fact that although misacanthus briquettes shows a lower value of the the lower calorific power than those of sawdust may be a viable alternative to the fossil fuel until recently used exclusively (wood, coal, etc.), without issuing dangerous pollutants in the environmental atmosphere. [ABSTRACT FROM AUTHOR]