CHEN Gang,CHEN Si-yuan,XIAO Xiang-zhe,et al.Toxicity of Orange Peel Essential Oil to Anaerobic Co-digestion of Orange Residue and Excess Sludge[J].China Water & Wastewater,2021,37(13 13):77-82.
Toxicity of Orange Peel Essential Oil to Anaerobic Co-digestion of Orange Residue and Excess Sludge
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
13 13
Page:
77-82
Column:
Date of publication:
2021-07-01
- Keywords:
- orange peel essential oil; anaerobic co-digestion; specific methanogenic activity; toxicity
- Document code:
- A
- Abstract:
- In order to investigate orange residue essential oil (EO) toxicity to orange residue and excess sludge anaerobic co-digestion system, effect of EO on specific methanogenic activity and toxicity inhibition of the anaerobic co-digestion system was explored by changing EO content in the co-digestion substrate. When EO content was 550 mg/kg and 750 mg/kg in the toxicity tests, it had certain promoting effect on the anaerobic fermentation system, and the cumulative gas yield was increased by 16.8% and 21.1% compared with that of the control group. When EO content was 950 mg/kg and 1 150 mg/kg, the anaerobic co-digestion system was slightly and moderately inhibited, and its cumulative gas yield decreased by 39.1% and 49.9% compared with that of the control group, respectively. When EO content was 1 350 mg/kg, the anaerobic co-digestion system was seriously inhibited, and the specific methanogenic activity decreased by 98.4% compared with that of the control group, and the gas yield was close to zero. Toxicity recovery experiment showed that high EO content (1 150 mg/kg, 1 350 mg/kg) produced certain physiological toxins to microorganisms in the anaerobic co-digestion system and coenzyme F420 content was significantly decreased. As a result, the methanogenic activity of the system was severely inhibited.
Last Update:
2021-07-01