The biodiesel wastewater wasdark ye

The biodiesel wastewater was
dark yellowish cream in color, highly turbid, pungent smelling and has high organic load as seeds are used as a chief
raw material in the production, with high levels of chemical oxygen demand, biological oxygen demand, oil, high
suspended and dissolved solids, high amount of sodium, nitrogen, phosphorus and potassium content (Mohana et al.,
2011). As such, biological treatment of the biodiesel wastewater is expected to be very difficult (Suehara et al.,
2005; Chavalparit & Ongwandee, 2009). For this reason supportive physic-chemical methods are often used.
Although one of the most frequently employed method is coagulation.Coagulation/flocculation is a commonly used
process in water and wastewater treatment in which compounds such as coagulant are added to wastewater in order
to destabilize the colloidal materials and cause the small particles to agglomerate into larger settleable flocs (Aygun
& Yilmaz, 2010).