Research Of Bio-emulsifier To Strengthen The Biological Treatment Of Oil-containing Wastewater

Ofl containing wastewater has great influence on water quaBty and aesfcetic value. Ihae are various waysibrtreatrneiloflhiskirriofwastwatei;eapproach that uses bioemulsifier (a kind of commercial product, abbreviated to BE hereinafter) to strengthen the biological treatment of (A containing wastewater Because BE is atypKofbk)-sirlactant with tow toxkityarrl high bkxkgracJabitity, it is utilized to emulsify (A so that make ofl ccrlaining wastewaterbiodegradable but not to change into secondary pollutants.fa order to assess the effect ofbfoemulsifier on the bfotogical treatment of ofl containing was^ bench scale laboratory study comprising two CFSTRsandaSBRwasusedThe study was conducted in two parts. In Part 1, Ihe removal efficiency of two CFS'TRs with 1he same valid volume and tbe same water quality, one dosed with BE arddha without, with respect to oil, GOD, nitrogen and phosphorus (as PO^-P) and other items woe irrvestigatedSkdiflerent ofl toads were used PreHminaiyiesultsindkated to with the ad^^ saklbk>^mulsifiertebidDgcal removal of ofl in the reactors was promoted ; the biological behaviors in reactors woe improved; the pH were not changed, but tbe amount of dissolved oxygen in die reactors was increased However, there were no substantial influence on the biological removal of nitrogen and phosphorus by the addition of the bJo-emulsifier.In Part 2, the bio-kinetic coefficients were determined with an SBRrrxxki The valid volume of the SBRused was 3.4 liter: The SBR track run designed to model CTSTIl^withdiffire The correspondrng results dosed with 0 mg/L and 2 mg/L BE respectively were as follows:COD, Y0.44, 0.399 and l.lSd1, Ks363mg/L COD, Y0.31, 10.2 lOd'1. Because it is a relatively new subject to strengthen the biological treatment of the ofl containing wastewater using bk>^mulsifiei; many researdipro...