Organic matter is a widely occurring pollutant in freshwater sources due to the extensive use of synthetic organic compounds industry and natural occurrence Earth’s crust. causes adverse effects on performance water treatment plants, such as accelerated bacterial growth increased consumption chemical coagulants. also has ability chelate some heavy metals forming refractory complexes that resist...

This paper presents results of investigations on physicochemical treatment of vegetable oil refinery wastewater (VORW), namely acid and technological wastewater. The study has shown that VORW has a varying high pollution load (organic matter, sulfates, phosphates and chlorides) and the removal of these pollutants from acid wastewater was more effective than that from technological wastewater; t...

Tofu processing has changed little in the last 2000 years (HOU; CHANG; SHIH, 1997). The processing techniques may vary according to the manufacturer, but the basic steps include soybean soaking and grinding, soymilk boiling, and the addition of one or more coagulants (CUI et al., 2004). The ground soybean material or the soymilk obtained after filtration is heated in order to denature the prote...