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A new photo-activated sludge system for nitrification by an algal-bacterial consortium in a photo-bioreactor with biomass recycle \ Water science and technology : a journal of the International Association on Water Pollution Research [Artikel]
Steen, P. van der \ Rahsilawati, K. \ Rada-Ariza, A.M. \ Lopez-Vazquez, C.M. \ Lens, P.N.L. \ 2015
Wastewater treatment technologies requiring large areas may be less feasible in urbanizing regions of developing countries. Therefore, a new technology, named photo-activated sludge (PAS), was investigated to combine the advantages of regular activat ...
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Nuclear magnetic resonance in environmental engineering : principles and applications \ Biodegradation [Artikel]
Lens, P.N.L. \ Hemminga, M.A. \ 1998
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13C-NMR study of propionate metabolism by sludges from bioreactors treating sulfate and sulfide rich wastewater \ Biodegradation [Artikel]
Lens P.N.L. \ Dijkema, C. \ Stams, A.J.M. \ 1998
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Effect of nitrate on acetate degradation in a sulfidogenic staged reactor \ Water research : the journal of the International Association on Water Quality [Artikel]
Lens, P.N.L. \ Sipma, J. \ Hulshoff Pol, L.W. \ 2000
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Selenate removal in methanogenic and sulfate-reducing upflow anaerobic sludge bed reactors \ Water research : the journal of the International Association on Water Quality [Artikel]
Lenz, M. \ Hullebusch, E.D.V. \ Hommes, G. \ Corvini, P.F.X. \ Lens, P.N.L. \ 2008
This paper evaluates the use of upflow anaerobic sludge bed (UASB) bioreactors (30 graden C, pH=7.0) to remove selenium oxyanions from contaminated waters under methanogenic and sulfate-reducing conditions using lactate as electron donor. One UASB re ...
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Carbon monoxide conversion by anaerobic bioreactor sludges \ FEMS microbiology ecology / Federation of European Microbiological Societies [Artikel]
Sipma, J. \ Lens, P.N.L. \ Stams, A.J.M. \ Lettinga, G. \ 2003
Seven different anaerobic sludges from wastewater treatment reactors were screened for their ability to convert carbon monoxide (CO) at 30 and 55degreesC
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Nickel and cobalt sorption on anaerobic granular sludges: kinetic and equilibrium studies \ Journal of chemical technology and biotechnology : the international journal for biotechnical and chemical processes [Artikel]
Hullebusch, E.D. van \ Zandvoort, M.H. \ Lens, P.N.L. \ 2004
The kinetics and equilibria of sorption of the divalent metal ions cobalt and nickel onto anaerobic granular sludge are described. Single component and binary equimolar systems were studied at different pH values (pH 6, 7 and 8). The kinetic modellin ...
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High-rate sulfate reduction at high salinity (up to 90 mS/cm) in mesophilic UASB reactors \ Biotechnology and bioengineering [Artikel]
Vallero, M.V.G. \ Sipma, J. \ Lettinga, G. \ Lens, P.N.L. \ 2004
Sulfate reduction in salt-rich wastewaters using unadapted granular sludge was investigated in 0.9 L UASB reactors (pH 7.0 ± 0.2; hydraulic retention time from 8-14 h) fed with acetate, propionate, or ethanol at organic loading rates up to 10 gCOD/l. ...
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Effect of NaCl on thermophilic (55 degrees C) methanol degradation in sulfate reducing granular sludge reactors \ Water research : the journal of the International Association on Water Quality [Artikel]
Vallero, M.V.G. \ Pol, L.W.H. \ Lettinga, G. \ Lens, P.N.L. \ 2003
The effect of NaCl on thermophilic (55degreesC) methanol conversion in the presence of excess of sulfate (COD/SO42-=0.5) was investigated in two 6.5L lab-scale upflow anaerobic sludge bed reactors inoculated with granular sludge previously not adapte ...
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Selective recovery of nickel over iron from a nickel-iron solution using microbial sulfate reduction in a gas-lift bioreactor \ Water research : the journal of the International Association on Water Quality [Artikel]
Bijmans, M.F.M. \ Helvoort, P.J. van \ Dar, S.A. \ Dopson, M. \ Lens, P.N.L. \ Buisman, C.J.N. \ 2009
Process streams with high concentrations of metals and sulfate are characteristic for the mining and metallurgical industries. This study aims to selectively recover nickel from a nickel–iron-containing solution at pH 5.0 using a single stage bioreac ...
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Effect of high salinity on the fate of methanol during the start-up of thermophilic (55 degrees C) sulfate reducing reactors \ Water science and technology : a journal of the International Association on Water Pollution Research [Artikel]
Vallero, M.V.G. \ Pol, L.W.H. \ Lens, P.N.L. \ Lettinga, G. \ 2002
Two 6.5 L lab-scale upflow anaerobic sludge bed (UASB) reactors were operated at 55degreesC fed with methanol as the sole electron and carbon source and in excess of sulfate in order to investigate the effect of high wastewater salinity on the start- ...
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Assessment of compatible solutes to overcome salinity stress in thermophilic (55 degrees C) methanol-fed sulfate reducing granular sludges \ Water science and technology : a journal of the International Association on Water Pollution Research [Artikel]
Vallero, M.V.G. \ Lettinga, G. \ Lens, P.N.L. \ 2003
High NaCl concentrations (25 g.L-1) considerably decreased the methanol depletion rates for sludges harvested from two lab-scale sulfate reducing UASB reactors. In addition, 25 gNaCl.L-1 strongly affected the fate of methanol degradation, with clear ...
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