Diseño de un sistema de tratamiento del agua residual de la Lavandería Splendid - Riobamba

Abstract

A wastewater treatment system was designed for the clothes washing process of the SPLENDID Company located in the city of Riobamba. In order to carry out this research, the company was surveyed, the available physical space was determined, the sampling point in the revision box, the flow rate by means of indicators based on the amount of water used per kg of clothes washed with a value of 21 m3/d. The composite sampling used consisted in collecting every day in 6h a determined volume of W.W. for a month with a total of 4 samples to determine the physical-chemical parameters respectively. The wastewater treatment plant was designed with a channel, screens, a primary settling tank 3 m high and 0.837 m in radius, a flocculation tank 2.5 m high and 1.038 m in diameter using aluminum polychloride for the process and finally a secondary settling tank 3.00 m high and 1.298 m in diameter. We conclude that the net efficiency of the treatment is 70.4%, with a BOD5 reduction of 248.35 mg/L, so that the water can be discharged to the city sewer system. The investment for the implementation of the wastewater treatment plant is $ 5,736.86 of owner's investment. We recommend that the design guidelines set forth in this research work be followed when constructing the proposed treatment system.