Abstract：
:Currently, the dissolved lignocelluloses in the spent liquor (SL) of a thermomechanical pulping process are treated in wastewater treatment systems and thus they are wasted. In this work, polydiallyldimethylammonium chloride (PDADMAC), with different molecular weights, was used for flocculating lignocelluloses of SL and thus isolating them from SL. Results showed that the maximum removals were 38% via treating SL with 100 mg/L of PDADMAC (with 1045 kg/mol molecular weight) at 25 °C for 30 min. The focused beam reflectance measurement of the flocculation process revealed that the chord length of the flocs with the maximum square weighted counts was increased from 70 to 100 μm and also their maximum square weighted counts was increased from 5 to 25 μm2/s. The flocs contained 60.71-74.41 wt% PDADMAC, the balance of lignocelluloses and the heating value of 24-25 MJ/kg. The high molecular PDADMAC generated flocs with more organics and a higher heating value.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Sun Y,Liu Z,Fatehi Pdoi
10.1016/j.jenvman.2017.05.042subject
Has Abstractpub_date
2017-09-15 00:00:00pages
275-282eissn
0301-4797issn
1095-8630pii
S0301-4797(17)30501-7journal_volume
200pub_type
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