Several thousand
tonnes of wastepaper sludge is generated annually in Australia,
with the State of Victoria alone generating in excess of 1300 tonnes
each year, which is largely sent to landfill (Yan et al., 2011). An
estimated 6 million tonnes per annum of paper sludge was
reportedly generated in Europe and 4.5 million tonnes per annum
in the USA (Frías et al., 2008)