期刊
CHEMICAL ENGINEERING JOURNAL
卷 178, 期 -, 页码 232-238出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2011.10.058
关键词
Magnetization; Complex; Flocs; Wastewater; Pilot scale test
资金
- National Natural Science Foundation of China [50878121, 51178252]
- Shandong Outstanding Young and Middle-aged Scientists Research Award Fund [BS2011HZ007]
- Key Projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period [2006BAJ08B05-2]
- National Major Special Technological Programmes Concerning Water Pollution Control and Management in the Eleventh Five-year Plan Period [2008ZX07010-008]
A new method for the advanced treatment of pulp and paper wastewater was presented by combining the magnetization with iron-based complex. The iron-based complex was prepared by ferric sulfate and polycarboxylic acid (PA), forming the Fe-PA complex. Effect of magnetization conditions (magnetic intensity and water velocity) on the physical and chemical properties of wastewater were measured. Results indicated that the conductivity and surface tension of wastewater have been greatly changed after the magnetization process, and the optimal magnetizing conditions were determined as magnetic intensity of 750 mT and water velocity of 4.4 m/s. Parameters of the flocs indicated that the properties of flocs formed by Fe-PA complex were enhanced by magnetization. What's more, the pretreatment of wastewater by magnetization accelerated the removal of CODCr and cut down about 7.7% of the Fe-PA complex dosage. In addition, the pilot scale test (1000 m(3)/d) was designed and the combined use of magnetization and Fe-PA complex demonstrated the excellent performance for the advanced treatment of pulp and paper wastewater, with the cost only 0.84 RMB/m(3) (0.13 US$/m(3)) for the whole pilot scale system. (C) 2011 Elsevier B.V. All rights reserved.
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