Bio-entrapped membrane reactor and salt marsh sediment membrane bioreactor for the treatment of pharmaceutical wastewater: Treatment performance and microbial communities

Ng, Kok Kwang; Shi, Xueqing; Yao, Yinuo; Ng, How Yong

doi:10.1016/j.biortech.2014.08.078

Cited by 34 publications

(7 citation statements)

References 31 publications

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“…In addition, the average value of MLVSS/MLSS in the attached sludge of AMCMBR exceeded 0.70, revealing that the biomass in the pilot-scale AMCMBR was healthy. The findings are in agreement with Chen [42] and Ng's study [43], who found that the biomass kept healthy when the MLVSS/MLSS ratio was 0.8 ± 0.05. These conclusions demonstrated that AMCMBR has good pollutants removal in comparison with AOA-MBR under different working conditions.…”

Section: Sludge Characteristic Of Different Reactorssupporting

confidence: 92%

Effect of Volume Loading Rate and C/N on Ship Domestic Sewage Treatment by Two Membrane Bioreactors

Cai

Zaidi

Sun

et al. 2019

Period. Polytech. Chem. Eng.

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Design of ship sewage treatment systems that not only satisfy the use of small space on board but also meets International Maritime Organisation (IMO) latest emission standards is still a challenging problem for ship industry. This study provides a comparative disquisition between two different MBR reactors i.e, air-lift multilevel circulation membrane reactor (AMCMBR) and anaerobic/anoxic/aerobic membrane reactor (AOA-MBR) for domestic sewage treatment. The influence of pollutants volume loading rate (VLR) and C/N on effluent chemical oxygen demand (COD), ammonium nitrogen (NH4+-N) and TN for marine domestic sewage was analyzed. The results revealed that AMCMBR showed better removal efficiencies for COD and TN than AOA-MBR. The volume of AMCMBR was only half of the AOA-MBR. In addition, high average value of mixed liquor volatile suspended solids (MLVSS)/mixed liquid suspended solids (MLSS) (i.e. 0.75) of AMCMBR indicated high biomass and good pollutants removal achieved by this reactor. An interesting phenomenon was found in the study regarding Urease activity for the two reactors. Urease activity for AMCMBR in different working conditions all exceeded AOA-MBR and there exist no clear difference of NR activities between AMCMBR and AOA-MBR except for low C/N ratio (i.e. 6 and 4). This phenomenon proved that AMCMBR has a greater performance for treating ship domestic wastewater.

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Section: Sludge Characteristic Of Different Reactorssupporting

confidence: 92%

Effect of Volume Loading Rate and C/N on Ship Domestic Sewage Treatment by Two Membrane Bioreactors

Cai

Zaidi

Sun

et al. 2019

Period. Polytech. Chem. Eng.

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“…Deng et al, in their study, indicated that longest HRT showed an increase in COD removal (95.72 ± 4.35%), at HRT of 6.67 hr than at shorter HRT which decreased COD removal efficiency to 93.75 ± 3.95% at HRT 4 hr. These results attributed that increase in OLR, with decrease in HRT, disturbed the biological system to degrade organic components . Another study by Wei et al found that at maximum volumetric OLR (10 g COD/L/d) high COD removal efficiency (>95%) was achieved in AnMBR treating simulated municipal wastewater.…”

Section: Resultsmentioning

confidence: 96%

“…These results attributed that increase in OLR, with decrease in HRT, disturbed the biological system to degrade organic components. 23 Another study by Wei et al 4 found that at maximum volumetric OLR (10 g COD/L/d) high COD removal efficiency (>95%) was achieved in AnMBR treating simulated municipal wastewater.…”

Section: Cod Mass Balancementioning

confidence: 97%

Performance evaluation and organic mass balance for treatment of high strength wastewater by anaerobic hybrid membrane bioreactor

Burman

Sinha

2019

Env Prog and Sustain Energy

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The performance and chemical oxygen demand (COD) mass balance of a lab‐scale anaerobic hybrid membrane bioreactor (An‐HMBR), treating high strength wastewater, at mesophilic temperature, was investigated. Long‐term (275 days) operation was carried out at various hydraulic retention times (HRTs), namely, 3, 2, 1, and 0.5 days corresponding to organic loading rate (OLR) of 1.06, 1.6, 3.2, and 6.4 kg COD/m3d, respectively. An‐HMBR achieved, COD removal of 97–87% at HRT of 3–0.5 days, respectively. The study showed that polyurethane foam as attached growth media adsorbed mixed liquor suspended solids and thereby reduced the load on the membrane by 42%. During COD mass balance, an additional 4–5% of COD balance was achieved by consideration of COD conversion to biomass. The results suggest that unknown COD fraction varies between 33 and 37%, which was attributed to the loss of gaseous as well as oversaturation of dissolved methane. Consideration of oversaturation leads to a COD mass balance of over 95%.

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“…Among the three dominant phyla, Bacteroidetes showed the highest average abundance (41.9%) in both the inocula and adapted biomasses, which revealed its high richness in the natural sediment environment, 37,38 as well as its remarkable adaptation potential in the engineered saline wastewater treatment system. 39,40 In addition, it has been reported that members of Bacteroidetes are important heterotrophs involved in cycling organic carbon and proteinaceous substances, 41,42 and hence Bacteroidetes should play a vital role in the anaerobic degradation. Proteobacteria is another key bacterial group in conventional biological wastewater treatment processes.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

Investigation of Intertidal Wetland Sediment as a Novel Inoculation Source for Anaerobic Saline Wastewater Treatment

Shi

et al. 2015

Environ. Sci. Technol.

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130

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Biological treatment of saline wastewater is considered unfavorable due to salinity inhibition on microbial activity. In this study, intertidal wetland sediment (IWS) collected from a high saline environment was investigated as a novel inoculation source for anaerobic treatment of saline pharmaceutical wastewater. Two parallel lab-scale anaerobic sequencing batch reactors (AnSBR) were set up to compare the organic removal potential of IWS with conventional anaerobic digested sludge (ADS). Under steady-state condition, IWS reactor (R(i)) showed organic reduction performance significantly superior to that of ADS reactor (R(a)), achieving COD removal efficiency of 71.4 ± 3.7 and 32.3 ± 6.1%, respectively. In addition, as revealed by fluorescent in situ hybridization (FISH) analysis, a higher relative abundance of methanogenic populations was detected in R(i). A further 16S rRNA gene pyrosequencing test was conducted to understand both the bacterial and archaeal community populations in the two AnSBRs. A predominance of halophilic/tolerant microorganisms (class Clostridia of bacteria, genera Methanosarcina, and Methanohalophilus of archaea) in R(i) enhanced its organic removal efficiency. Moreover, several microbial groups related with degradation of hardly biodegradable compounds (PAHs, n-alkenes, aliphatic hydrocarbons, and alkanes, etc.) were detected in the IWS. All these findings indicated that IWS is a promising inoculation source for anaerobic treatment of saline wastewater.

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Bio-entrapped membrane reactor and salt marsh sediment membrane bioreactor for the treatment of pharmaceutical wastewater: Treatment performance and microbial communities

Cited by 34 publications

References 31 publications

Effect of Volume Loading Rate and C/N on Ship Domestic Sewage Treatment by Two Membrane Bioreactors

Effect of Volume Loading Rate and C/N on Ship Domestic Sewage Treatment by Two Membrane Bioreactors

Performance evaluation and organic mass balance for treatment of high strength wastewater by anaerobic hybrid membrane bioreactor

Investigation of Intertidal Wetland Sediment as a Novel Inoculation Source for Anaerobic Saline Wastewater Treatment

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