Details

Autor(en) / Beteiligte

• Wang, Jianguang
• Sun, Zhirong

Titel

Exploring the effects of carbon source level on the degradation of 2,4,6-trichlorophenol in the co-metabolism process

Ist Teil von

• Journal of hazardous materials, 2020-06, Vol.392, p.122293, Article 122293

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2020

Quelle

MEDLINE

Beschreibungen/Notizen

• [Display omitted] •The effect of the carbon level on the degradation of 2,4,6-TCP was investigated.•A novel method was established to strengthen the removal of 2,4,6-TCP.•Excessive carbon results in lower 2,4,6-TCP removal.•Suitable carbon level increases 2,4,6-TCP removal and functional bacteria growth.•Carbon source addition reduces the DO and further influences the 2,4,6-TCP removal. External organic sources could make up for the lack of carbon in the treatment of chlorophenol; but the impact on external carbon concentration on the degradation of 2,4,6-trichlorophenol (2,4,6-TCP) has rarely been studied. In this study, the effect of carbon addition on the degradation of 2,4,6-TCP was investigated using the lab-scale sequencing batch reactor (SBR). The results indicated that excessive carbon amounts inhibited 2,4,6-TCP degradation in the long-term operation and a typical cycle, while a suitable dosage could increase the removal of 2,4,6-TCP. The application of external carbon rapidly decreased the dissolved oxygen level of the system, resulting in inhibited chlorophenol removal. The concentration of removed 2,4,6-TCP could be increased from 35.49–152.89 mg L−1 by adjusting the carbon dosage. At the phylum level, Proteobacteria and Acidobacteria phylum bacteria, related to 2,4,6-TCP removal, were dominant when no carbon source was added, while excessive carbon levels resulted in the overgrowth of Saccharibacteria (50.19 %), responsible for carbon metabolism. In co-metabolism systems, chlorophenol-contaminated wastewater can effectively be treated by adjusting the external carbon source.