Journal
BIORESOURCE TECHNOLOGY
Volume 319, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.124110
Keywords
Pyridine wastewater; 3-chloropyridine (3-ClPyr); Pre-electrochemical treatment; Biofilm reactor; Microbial community
Funding
- Zhejiang Provincial Key Research and Development Program [2020C03085]
- National Natural Science Foundation of China [21576241]
Ask authors/readers for more resources
A method combining pre-electrochemical treatment with fixed bed biofilm reactor was designed to effectively degrade multi-component pyridine wastewater, achieving high mineralization efficiency especially for the persistent 3-chloropyridine. During the treatment process, interspecies competition between Rhodococcus and Paracoccus in the biofilm occurred, with Paracoccus eventually becoming the dominant genus to complete the degradation of all pollutants.
To overcome the high biotoxicity and poor biodegradability of pyridine and its derivatives, a pre-electrochemical treatment combined with fixed bed biofilm reactor (EC-FBBR) was designed for multi-component stream cluding pyridine (Pyr), 3-cyanopyridine (3-CNPyr), and 3-chloropyridine (3-ClPyr). The EC-FBBR system could simultaneously degrade these pollutants with a mineralization efficiency of 90%, especially for the persistent ClPyr. Specifically, the EC could partially degrade all pollutants, and allow them to be completely destructed FBBR. With EC off, Rhodococcus (35.5%) became the most abundant genus in biofilm, probably due to its tolerance to 3-ClPyr. With EC on, 3-ClPyr was reduced to an acceptable level, thus Paracoccus (21.1%) competed among interspecies competition with Rhodococcus and became the dominant genus. Paracoccus considered to participate in the subsequent degradation for the residual 3-ClPyr, and led to the complete struction for all pollutants. This study proposed promising combination for effective treatment of multi-component pyridine wastewater.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available