Rediseño del sistema de tratamiento de agua potable para la parroquia Químiag cantón Riobamba.

Abstract

System redesign of potable water for Químiag parish in Riobamba, was performed to obtain water quality that meets the standard NTE INEN 1108: 2006. “Drinking water. Requirements” Second Revision.

Therefore sampling and physic chemical and microbiological preliminary water treatment plant was performent to determine its current state, the analyzes were based on methods and techniques of Standard Mathods, determining that the parameters were standard: Turbidity 39,23NTU, color 25 UTC, iron 0,49 mg/L, manganese 0,74 mg/L, total coliforms 400 NMP/100mL and fecal coliforms 200 NMP/100mL.

EMAPAG it possible to determine the dose of Poly Aluminum chloride (PAC) of 45 ppm with an anionic auxiliary CHEMFLOC 0,6 ppm concentration required to decrease values – then treatability test in laboratory CHAQUISCA of PD were conducted parameters: turbidity and color also trying coliforms calcium hypochlorite (HTH) with a concentration of 1,5ppm.

The proposed redesing indicates that the plant will consist of the following processes: Aeration system, followed by a triangular weir and Parshall Flume, it is complemented by floculadores horizontal flow, a settler high rate, slow sand filters and finally an tank disinfection. Validation test of the proposed treatment tell us that removal 91,38% iron, 97,84%manganese, 97,30% haze, 98 color and coliforms are completely removed is obtained.