Table 1.

Specific volume ranges of proteins and polysaccharides (µm³ µm⁻²) on the non-modified (PVDF) and modified PVDF (mPVDF) membranes measured in different surface locations after the fouling test (time of operation > 800 h) with the anaerobic reactor effluent (before extraction) and after the fouling extraction. Imaged surface size of 1300 µm × 1300 µm

	Before extraction		After extraction
	PVDF	mPVDF	PVDF	mPVDF
Proteins	27–37	21–29	10–12	12–15
Polysaccharides	15–17	18–19	9–21	n.d

n.d: not detected