The pollution of the sea water by the waste from the LNG plant Arzew-Algeria and the waste water purifying system

Full text: Generally, the pollution makes a lot of problems for the environment. The natural gas (N.G.) is a compound of the light hydrocarbons, methane, ethane, propane, butane and other trace elements, like Helium, Nitrogen, Carbon Dioxide and others. After the different zones of the natural gas treatment, a problem of pollution of water is appeared. In this plant there are eight zones, six units of process, one for the energy production and another for the storage. It exists a system to treat all the effluents contamination coming from these zones. The treatment of this waste water consists in the separation of the oil and the sludge to satisfy the standard environmental protection. There are six separators, pools of concrete are connected with a collector for supply which is connected with each separator by three conduits. A diffusion apparatus is put in front of every nozzle of entry in the separator, and this is for a suitable distribution of the liquid in the separator. In reason of the decrease speed of the liquid when it passes through the separator, the particles carried, deposit in the bottom of the separator. The suspended matters are collected by a chain collector. The float matters up the liquid of the separators, mainly oils, are removed through the creaming tubs