期刊
CHEMICAL ENGINEERING JOURNAL
卷 315, 期 -, 页码 83-91出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.01.022
关键词
SAnMBR; Sewage; LAS; Performance; Influence mechanism
资金
- KAKENHI [26289179]
- JSPS (Japan Society for the Promotion of Science) KAKENHI [26.04734]
- Fundamental Research Funds for the Central Universities China University of Geosciences (Wuhan)
- Grants-in-Aid for Scientific Research [26289179] Funding Source: KAKEN
The effect of linear alkylbenzene sulfonate (LAS), a typical anionic surfactant, on the sewage treatment by a submerged anaerobic membrane bioreactor (SAnMBR) was investigated by a 243 days operation. The changes of treatment efficiency, methane recovery and sludge activity due to the presence of LAS in sewage was studied in detail. Compared with control (96.8% and 2.87 L/d), lower COD removal (95.2%) and biogas production rate (2.11 L/d) were found at a LAS dosage of 5 mg/L. Besides, LAS was removed by adsorption rather than degradation on the sludge (30-70%). Its adsorption can lead to significant loads in sewage sludge, which then decrease the methane production activity. The recovery efficiency of potential bioenergy was decreased by 20% and 26% at LAS of 2.5 mg/L and 5.0 mg/L, respectively. The results indicated that LAS had a more negative effect on the acetoclastic methanogens than acidogenic micro biota and the LAS inhibition to methanogen activity was responsible for the decrease of SAnMBR performance. Moreover, LAS caused a higher membrane fouling rate than the control experiment due to the microbial self-protection behavior in coping with the LAS in sewage. SAnMBR was hence not suitable to dispose LAS containing sewage with higher concentration. (C) 2017 Elsevier B.V. All rights reserved.
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