Abstract:
The use of conventional direct current-electrocoagulation in wastewater treatment is limited by its drawbacks,
which include electrode passivation, high energy consumption, and significant sludge generation. Therefore, to
address these issues, pulsed-electrocoagulation (PECP) has been developed. The PECP is an advanced wastewater treatment technique that uses intermittent electrical pulses to target and break down organic compounds in
wastewater. It offers several benefits, including enhanced removal of organic compounds, reduced chemical
consumption, energy efficiency, treatment of complex wastewater composition, pathogen inactivation, envi
ronmental compliance, and potential for water reuse. In this research, removal efficiency of % Chemical Oxygen
Demand (COD), % Color, % Turbidity, % phosphate, and %nitrate was investigated for the wet coffee processing
wastewater by using PECP and the obtained results as the COD-98.75%, color-99.92%, turbidity-99.00%,
phosphate-99.02%, and nitrate-98.83%, respectively. Independent variables were the major significant factors
and the optimum value was investigated and obtained at pH of 7, electrolyte dosage of 0.75 g L
1
, electrolysis
time of 45 min, and current of 0.45 Amp. As a result, PECP with NaCl and CaCl2 as an electrolyte is an effective treatment technique for pollutant removal from wastewater. As a consequence, the specific benefits may vary depending on the system design, operational parameters, and wastewater characteristics. The pilot-scale studies and optimization are essential for assessing PECP feasibility and performance.
