Enhancement of Organic Matter Removal in an Integrated Biofilm-Membrane Bioreactor Treating High-Salinity Wastewater.
Yan YangZhiyu ShaoJun DuQiang HeHongxiang ChaiPublished in: Archaea (Vancouver, B.C.) (2018)
High salinity can strongly inhibit microbial activity and decrease the sedimentation ability of activated sludge. The combination of biofilm and membrane bioreactor is a practical approach towards effective removal of pollutants and low fouling rate. An integrated biofilm-membrane bioreactor (BMBR) treating mustard tuber wastewater was investigated. An average COD removal efficiency of 94.81% and ammonium removal efficiency of 96.84% were achieved at an organic load of 0.5 kg COD/(m3·d). However, the reactor showed a relatively low efficiency in total nitrogen and soluble phosphorus removal due to the lack of anaerobic environment. The increase of influent organic load resulted in a performance degradation because a balance between the degradation ability and pollution has been reached. Images of scanning electron microscopy revealed that halophilic bacteria were the dominant microbe in the system that leads to a loose sludge structure and declined settling properties. It was found that membrane fouling was the consequence of the interaction of microbial activities and NaCl crystallization.
Keyphrases
- wastewater treatment
- microbial community
- pseudomonas aeruginosa
- electron microscopy
- staphylococcus aureus
- anaerobic digestion
- candida albicans
- heavy metals
- organic matter
- biofilm formation
- deep learning
- sewage sludge
- high resolution
- risk assessment
- escherichia coli
- optical coherence tomography
- single cell
- health risk assessment