Design and implementation of a ptar for active sludge at laboratory scale, Science Faculty Espoch

Abstract

Research – experimental method was applied and it consisted in checking of several studies carried out in similar conditions, sampling in the cheese Factory Llin Llin, it is located at Pucará –Colta canton using point sampling, microbiological, physical, chemical and wastewater, development of previous calculations, construction, treatment and actual calculations. The building material for the laboratory scale plant was polycarbonate, the dimensions are taken into account the 12% of those obtained in previous calculations, tha plant har three tanks: reservoir, aeration and sedimentation with the following dimensions 50 cm x 50 cm x 75 cm and two tanks: treated water storage and sludge with dimensions 50 cm x 50 cm x 50 cm. The settling tank has a 20% slope. The treatment started using different hydraulic retention times (72-60-48-36-24-12-8-4 hours) for each simple and 11 days of cell retention. As a result of the treatment it was accomplished when removing BOD with an initial value of 28300 mg/L to 350 mg/L of a hydraulic retention time of 4 hours. It is concluded that the biological treatment performed in the laboratory scale plant has presented satisfactory efficiency of 98% for sewage of cheese factories. It is recommended to develop a strict control on the pH, temperature, dissolved oxygen, settleable solids, suspended and volatile to ensure proper treatment and reduce biochemical oxygen demanded.