Effect of sludge characteristics on membrane fouling during start-up of a tertiary submerged membrane bioreactor

Environmental Science and Pollution Research International
Oliver DíazJuan Rodríguez-Sevilla

Abstract

In membrane bioreactors applied to wastewater treatment, fouling is typically a complex function of sludge characteristics. A pilot-scale tertiary submerged membrane bioreactor (tMBR) was continuously operated for over 200 days to assess the effect of biomass physiological state and environmental stress on process performance. Sludge characteristics were evaluated in terms of suspended solid concentration (MLSS and MLVSS), apparent viscosity, bioflocculation state, filterability, bioactivity, biopolymeric clusters (BPCs) and soluble microbial products. During the initial period of the tMBR start-up, when MLSS was below 3000 mg/L, the biomass was found to be very sensitive to environmental stress by sudden oxygen increase or organic shock loading, resulting in temporary biomass deflocculation and BPC release, and consequently, severe induced membrane fouling. However, at higher MLSS values, low stable biomass growth (0.04 ± 0.002 kg MLVSS/kg COD) was measured, regardless of organic overloading shocks or feeding failures. This period was also characterised by low bioactivity, BPC content and membrane fouling. Statistical analysis showed that BPCs have an important role when compared with other sludge properties as indicators of i...Continue Reading

References

Mar 18, 2004·Water Research·Alfieri PolliceMassimo Blonda
Oct 12, 2010·Bioresource Technology·Gaetano Di BellaGaspare Viviani
Jan 22, 2011·Water Science and Technology : a Journal of the International Association on Water Pollution Research·H J LinB Q Liao
Mar 8, 2013·Biotechnology Advances·Zhiwei WangZhichao Wu
Feb 24, 2015·Bioresource Technology·Elisavet AmanatidouEleni Trikoilidou

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Citations

Oct 9, 2016·Environmental Science and Pollution Research International·Laura BoreaVincenzo Belgiorno
May 10, 2017·Environmental Science and Pollution Research International·Benny Marie B EnsanoVincenzo Belgiorno
Jun 20, 2018·Environmental Science and Pollution Research International·Jie WangHui Jia
Feb 13, 2017·Environmental Science and Pollution Research International·Muhammad AslamJeonghwan Kim
Mar 30, 2021·Journal of Environmental Management·Nawal TaoufikNoureddine Barka

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