Effects of Experimental Conditions on Extraction Yield of Extracellular Polymeric Substances by Cation Exchange Resin

Table 1

Different experimental conditions applied for EPS extraction in the cation exchange resin method.

	Extraction time	Stirring intensity	CER dose^*	Sample volume
Frølund et al. [16]	17 hrs at 4^°C	900 RPM	65–85 g/gVSS	300 mL sludge to 500 mL total vol.
Domínguez et al. [7]	16 hrs at 4^°C	900 RPM	70 g/gVSS	150 mL sludge^**
Nielsen et al. [17]	12 hrs at 4^°C	900 RPM	70–75 g/gVSS	200 mL sludge^**
Dignac et al. [18]	1 hr at 4^°C	Not specified	60 g (in 100 mL sludge)	100 mL sludge^**

^∗Cation exchange ion used; DOWEX 50X8, 20–50 mesh (Fluka 44445).
^**Total volume is not specified.