In general. wastewater treatment by physical. chemical and biological methods are only focused on TSS. BOD and COD removals that the effluent still contains anion pollutant as NO2- and S2-. https://www.glasssstationes.shop/product-category/acrylic-bongs/
Removal Efficiency of Nitrite and Sulfide Pollutants by Electrochemical Process by Using Ti/RuIrO2 Anode
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