Sewage and waterwaste pipe system
Water treatment methods include physical handling and chemical treatment. Human water treatment has been a considerable period of history, physical methods, including the use of a variety of pore size of different filters, the use of adsorption or barrier, the impurities in the water excluded, the adsorption method is more important for the adsorption of activated carbon, Barrier method is the water through the filter, so that larger impurities can not pass, and then get more clean water. In addition, the physical method also includes the precipitation method, is to let the smaller proportion of impurities floating in the water out, or the larger proportion of impurities precipitated in the next, and then achieved. Chemical method is the use of a variety of chemicals to impurities in the water into less harmful substances on the human body, or the concentration of impurities, the longest history of chemical treatment should be used to add alum to water, water impurities set, the volume change Large, you can use the filter method to remove impurities.