Natural Purification Sewage Disposal System by Double Ventilation Method and Aerobic-Anaerobic Combination Type

摘要

PURPOSE: Provided is a nature sewage treatment system having a compact size by arranging an aerobic zone above an anaerobic zone, thereby occupying g a small installation area in land, and double pipes to supply oxygen enough to microorganisms. CONSTITUTION: The system comprises an aerobic zone(10) having a gravel layer(15) at the bottom thereof, a sand layer(16) on the gravel layer(15), and water plants(17) planted in the sand layer(16); an anaerobic zone(40) formed under the aerobic zone(10), the anaerobic zone(40) having a gravel layer(25) at the bottom thereof, and a sand layer(26) on the gravel layer(25); a first air supply pipe(30) arranged in a matrix form at the bottom of the aerobic zone(10) and having an outlet extending to the anaerobic zone(40) and an inlet exposed to the air; a second air supply pipe(33) arranged in a matrix form at the middle height of the aerobic zone(10) and having an end exposed to the air; a plurality of connection pipes(34) for connecting the first air supply pipe(32) and the second air supply pipe(33); and a denitrification zone(20) located at a side of the anaerobic zone(40) and having a gravel layer(25) at the bottom thereof, a sand layer(26) on the gravel layer(25) and water plants(27) planted in the sand layer(26).