Abstract:
Wastewater generated from different sources affects the health of living organisms and the
natural environment due to the availability of different pollutants. Coffee processing waste
wastewater from coffee producing industries has to be managed and treated properly to be
used for different purposes. Electrocoagulation process is highly adopted these days due to
the installation and maintenance system being simple and operating cost is low. For the
treatment of coffee processing waste water single Sono (US) electrocoagulation, Photo (UV)
electrocoagulation and combined Sono (US) –Photo (UV) Electrocoagulation process is used
in this study. The effect of Sono – Photo Electrocoagulation for removal of BOD, COD,
Color, TDS, Turbidity and phosphate has been investigated, as well as the effect of various
operating parameters such as electric current (0.15 – 0.75 A), contact time (30 -60 min) and
pH (3-11) on removal efficiency have been identified firmly. The experimental runs and
findings were planned using the response surface methodology (RSM) based on Central
Composite Design (CCD). The maximum removal of BOD (99.73%), COD (99.73%), Color
(99.37%), TDS (96.76%), Turbidity (99.41%) and Phosphate (98.73%) was obtained at
electric current – 0.45A, pH – 7 and contact time 60 min. the combination of electrode Al-Al
with 2cm distancing were used. As a result, experimental findings Sono-Photo Electrocoagulation is found to be the good technology for coffee processing waste water
treatment which is achieved by coupling Sono (US) and Photo (UV) with the
electrocoagulation process.
