Research on treatment of printing and dyeing wastewater by hybrid anaerobic baffled reactor

• Published in: Desalination and water treatment 2015-04, Vol.54 (3), p.590-597
• Main Authors: Huang, Ruimin, Liu, Zhen, Zhou, Xiaoyun, Mo, Jiancheng, Liu, Xin
• Format: Article
• Language: English
• Subjects: Anaerobic bacteria; Anaerobic treatment; Bacteria; Color removal; Combined packing; Dye industry wastes; Dyeing; Dyes; Environmental conditions; Hybrid anaerobic baffled reactor (HABR); Inert carrier; Printing; Printing and dyeing wastewater; Printing industry; Reactors; Retention time; Sludge; Sulfur; Waste water; Wastewater treatment; Water treatment
• ISSN: 1944-3986; 1944-3994; 1944-3986
• DOI: 10.1080/19443994.2014.891463

The printing and dyeing wastewater was treated by a pilot-scale hybrid anaerobic baffled reactor (HABR) which was modified from general anaerobic baffled reactor by adding combined packing in the upper part of each compartment and inert carrier at the bottom of the reactor. The start-up of the reactor, the performance of HABR in treating printing and dyeing wastewater, and the transformation of sulfate and removal of bivalent sulfur in the treatment were investigated. The results showed that less time was taken during the start-up in comparison with the general one, and higher COD removal efficiency and sufficient color removal rate were also obtained in the HABR. When the hydraulic retention time was 12–13 h and the sludge return ratio was 0.3, the average COD and color removal rates were 47% and 56%, respectively. The anaerobic bacteria community in each compartment developed well because of available substrates and specific environmental conditions. The results also showed that high reduction rate of SO42- was reached in the HABR, and the S2− transformed from SO42- could be removed by adding Fe2+ into the wastewater in order to reduce the inhibitory effect on the anaerobic bacteria and the odor.