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In the oil extraction industry, large quantities of water are processed, which is extracted with the oil and gases from the deposits which is then used in the injection process. Water treatment is required because they contain various impurities that make them unsuitable for disposal in the environment. As these wastewater must be disposed of, the most appropriate way is to treat them and inject them into various underground layers. The most common use of wastewater is found in water injection processes to improve...

The purpose of the study was to present a case study on the parameters of photovoltaic systems installed on different types of roof. These research studies were conducted in the Laboratory of Renewable Energy at the University of Pite?ti.The case study analyzed the production of electricity for different photovoltaic systems, in terms of construction and placement.Mainly, the parameters of these systems were checked in the same weather conditions, such as: temperature, humidity, solar radiation and the unit of are...