id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-11940		cet-11940		6	.pdf	application/pdf	3497	148	43	Membrane cleaning contributes to the reactor’s operating cost to a large extent, including energy, chemicals and even production loss. Therefore, membrane cleaning is critical (Popović et al., 2010).	cache/cet-11940.pdf	txt/cet-11940.txt