Pulp is the raw material for producing various paper and paper products. Common paper products include office paper, books, newspapers, wrapping paper, toilet paper and paper towels.
Modern water treatment technologies include physical, chemical and biological treatment methods, such as sedimentation, filtration, disinfection, reverse osmosis and activated sludge process, etc. These methods can remove suspended solids, dissolved substances, microorganisms and pollutants in water to ensure that the water quality meets drinkingstandards
An oil field is a subsurface geological formation containing recoverable petroleum, usually consisting of large reservoirs of petroleum, which may be sedimentary rock or other geological forms.