polymeric polyelectrolytes obtained from renewable sources for biodiesel wastewater treatment by dual-flocculation
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2017
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Abstract
Biodiesel wastewater generally contains high levels of oils, soaps and glycerol residues. This needs wastewater treatment. In this study, the biodiesel wastewater treatment was tested (industrial wastewater (EFID) and laboratory wastewater (EFLB) from biodiesel) by performing flocculation and dual-flocculation with renewable polymers. Tannin and cationic hemicellulose (CH) were used as cationic flocculant, and cellulose acetate sulfate (CAS) was used as an anionic flocculant. Polyacrylamide (PAM) was used as a reference anionic flocculant for result efficiencies analysis obtained with CAS (renewable source flocculant). The treatment efficacy in wastewater was evaluated by: turbidity removal, sludge volume formed, chemical oxygen demand (COD) and total suspended solids (TSS). The obtained sludge was studied using thermogravimetric analysis (TG). The dual-flocculation application condition of the 25% proportion of tannin (T) and 75% proportion of cationic hemicelluloses (i.e., T25/CH75) showed EFLB turbidity removal of 89.1% and 89.5% for CAS and PAM additions respectively, and for EFID of 67% and 41% for CAS and PAM additions respectively. The dual-flocculation performance suggested that the polyelectrolytes obtained from renewable sources can be used for treating biodiesel wastewater.
| Reference Key |
ribeiro2017expresspolymeric
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| Authors | ;E. A. M. Ribeiro;G. Rodrigues Filho;N. S. Rozeno;J. M. B. A. Nogueira;M. A. Resende;J. P. Thompson Junior;J. G. Vieira;S. C. Canobre;F. A. Amaral |
| Journal | introducing the mysql 8 document store |
| Year | 2017 |
| DOI |
10.3144/expresspolymlett.2017.47
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| URL | |
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