Abstract
The objective of this research was to reduce the organic and biological load of tributaries of the Ancón Wastewater Treatment Plant using microanobubbles of air and graphene. A preliminary sample of the affluent (3L) was taken, which had an initial concentration of Biochemical Oxygen Demand (BOD5) of 410 mg/L, Chemical Oxygen Demand (COD) of 483 mg/L, Thermotolerant Coliforms of 44,000 NMP/100mL and turbidity of 63.33 NTU. The experimental part was carried out with 03 samples of 20 liters with 03 repetitions with a treatment time of 20, 40 and 60 minutes applying air nanobubbles and 6, 12 and 18 grams of graphene respectively. The results of the treated samples were: 87 mg/L representing 78.8% reduction in Biochemical Oxygen Demand (BOD5), 114 mg/L representing 76.4% reduction in Chemical Oxygen Demand (COD), 2,900 NMP/100mL that represents 93.41% reduction of Thermotolerant Coliforms and 12.4 NTU that represents 80.11% reduction of turbidity.
Highlights
In recent years there is a lack of environmental awareness, due to population growth and industrialization, where large amounts of wastewater are generated daily
The Chemical Oxygen Demand (COD) was reduced by 66.17% in the M2 sample, the BOD5 by 69.41% in the M1 sample and the SST by 98.57% in the M2 sample in hair samples using micronanobubbles (Aguilar, 2016)
Turbidity was reduced by 96%, electrical conductivity by 65%, BOD5 by 70% and salts in 47% in sea waters using graphene (Tapia and Valverde, 2017)
Summary
In recent years there is a lack of environmental awareness, due to population growth and industrialization, where large amounts of wastewater are generated daily Most of these waters are discharged directly without previous treatment to the receiving bodies; This being one of the main pollution factors in our ecosystem, affecting water quality and putting the health of the population at risk (OEFA, 2014). COD was reduced by 66.86% (from 173 mg/L to 57.33 mg/L) in a time of 15 minutes in river water samples using microanobubbles of air and ozone (Salguero and Valverde, 2017). The parameters of sample 1 such as turbidity decreased by 78.7% (from 467.4 NTU to 78 NTU), BOD5 by 45.12% (from 474 mg/L to 140 mg/L) and COD 44.03% (from 503.44 mg/L to 158.66 mg/L) in Sanguaza waters using air micro-nanobubbles at 60 minutes (Ventura and Valverde, 2017)
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