Effect of potassium sulfate concentration on synthesis of nitrate aqueous from the air using contact glow discharge electrolysis method

2020 ◽  
Author(s):  
Ardiansah ◽  
Puteri Salsabila ◽  
Nelson Saksono
Keyword(s):  
Glow Discharge ◽  
Potassium Sulfate ◽  
Sulfate Concentration ◽  
Contact Glow Discharge Electrolysis ◽  
Electrolysis Method ◽  
Glow Discharge Electrolysis

scholarly journals Tofu wastewater treatment using contact glow discharge electrolysis method and air injection

2018 ◽  
Vol 67 ◽  
pp. 01004
Author(s):  
Nadira Kamilia Permatasari ◽  
Widya Pangestika ◽  
Nelson Saksono
Keyword(s):  
Glow Discharge ◽  
Environmental Pollutants ◽  
Air Injection ◽  
Oh Radicals ◽  
Airflow Rate ◽  
Initial Concentration ◽  
Contact Glow Discharge Electrolysis ◽  
Electrolysis Method ◽  
Reduce Energy Consumption ◽  
Glow Discharge Electrolysis

Tofu wastewater is one of the most dangerous source of environmental pollutants. It is known that the COD of tofu wastewater can reach 8000 mg/L. Contact Glow Discharge Electrolysis (CGDE) method is an effective method in degrading complex pollutants contained in tofu wastewater, due to its ability to produce large quantities of OH radicals. This study aims to test the ability of the CGDE method in degrading the tofu wastewater by the addition air injection. In this method, several variations were made to determine the optimal airflow rate and initial concentration of tofu wastewater. Tofu wastewater degradation reached 73% for 120 minutes, with the final value of COD is 425 mg/L and BOD is 447 mg/L. Maximum conditions are obtained by using airflow rate 2.5 lpm, temperature 50°C, and initial concentration of tofu wastewater is 2000 ppm. The addition of air injection with airflowrate 2.5 lpm is able to reduce energy consumption by 37%. The results show that CGDE with air injection has the potential to degrade pollution parameter in tofu wastewater.

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