TAILIEUCHUNG - ENCYCLOPEDIA OF ENVIRONMENTAL SCIENCE AND ENGINEERING - SMALL FLOW WASTEWATER TREATMENT TECHNOLOGY FOR DOMESTIC AND SPECIAL APPLICATIONS

Gần đây mối quan tâm liên quan đến ô nhiễm nguồn nước và nhận thức chung trên toàn thế giới công cộng của vấn đề liên quan đến ô nhiễm đã dẫn đến áp lực gia tăng trên tất cả các chất thải xả để cung cấp điều trị hiệu quả và xử lý dòng thải của họ. Phân khu nhỏ, nhà nghỉ, khu nghỉ mát, nhà di động, tàu thuỷ, đường sắt, và như thế, đã không thoát khỏi những áp lực này, mặc dù trong nhiều khía cạnh tổng số đóng góp cho môi trường các chất thải. | SMALL FLOW WASTEWATER TREATMENT TECHNOLOGY FOR DOMESTIC AND SPECIAL APPLICATIONS Recent concern regarding water pollution and general worldwide public awareness of the problem associated with pollution has resulted in increased pressures on all waste dischargers to provide effective treatment and disposal of their waste streams. Small subdivisions motels resorts mobile homes watercraft railroads and the like have not escaped these pressures although in many respects their total waste contribution to the environment may be small. However as a result of the public awareness of pollution and increasing regulatory pressures there has been a rapid commercial growth in recent years in plants designed and built specifically for such applications. In this article the state of the art of small flow wastewater treatment systems developed for such special applications is presented. INDIVIDUAL HOMES The 1990 census figures indicate that there are more than 25 million onsite residential wastewater treatment systems in the United States often because wastewater collection sewers are not These systems include a variety of components and configurations. Among the most common systems are the anaerobic and aerobic biological treatment. In recent years constructed wetlands have also been investigated for home application. However no treatment systems as yet has been entirely satisfactory either to homeowners or to health 3 Anaerobic System Septic Tank Septic tank is the most commonly used individual waste disposal system. The US Environmental Protection Agency estimates that there are approximately 18 million housing units in the US that use on-site wastewater and disposal systems. This is about 25 of all housing units. Additionally about one-half million new systems are being installed each 3 A septic tank consists of a tank in which wastes are accumulated and digested under anaerobic conditions. The effluent from septic tanks is malodorous and the .

TỪ KHÓA LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.