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Papers by Jose Garcia
Biotechnology and Bioengineering, 1997
The anammox based process ELAN ® was started-up in two different SBR reactors treating municipal ... more The anammox based process ELAN ® was started-up in two different SBR reactors treating municipal anaerobic digester supernatant. The main difference in the operation of both reactors was the dissolved oxygen (DO) concentration in the bulk liquid. SBR-1 was started at a DO value of 0.5 mg/L whereas SBR-2 was started at DO values of 3 mg/L. Despite both reactors worked at a nitrogen removal rate of 0.6 g N/(L d), in SBR-1 granules represented only a small fraction of the total biomass and reached a diameter of 1.1 mm after 7 months of operation while in SBR-2 the biomass was mainly composed by granules with an average diameter of 3.2 mm after the same operational period. Oxygen microelectrode profiling revealed that granules from SBR-2 where only fully penetrated by oxygen with DO concentrations of 8 mg/L while granules from SBR-1 were already oxygen penetrated at DO concentrations of 1 mg/L.
Optics Letters, 2001
Using tightly focused femtosecond laser pulses of just 5 nJ, we produce optical breakdown and str... more Using tightly focused femtosecond laser pulses of just 5 nJ, we produce optical breakdown and structural change in bulk transparent materials and demonstrate micromachining of transparent materials by use of unamplified lasers. We present measurements of the threshold for structural change in Corning 0211 glass as well as a study of the morphology of the structures produced by single and multiple laser pulses. At a high repetition rate, multiple pulses produce a structural change dominated by cumulative heating of the material by successive laser pulses. Using this cumulative heating effect, we write single-mode optical waveguides inside bulk glass, using only a laser oscillator.
Optics Letters, 2001
Using tightly focused femtosecond laser pulses of just 5 nJ, we produce optical breakdown and str... more Using tightly focused femtosecond laser pulses of just 5 nJ, we produce optical breakdown and structural change in bulk transparent materials and demonstrate micromachining of transparent materials by use of unamplified lasers. We present measurements of the threshold for structural change in Corning 0211 glass as well as a study of the morphology of the structures produced by single and multiple laser pulses. At a high repetition rate, multiple pulses produce a structural change dominated by cumulative heating of the material by successive laser pulses. Using this cumulative heating effect, we write single-mode optical waveguides inside bulk glass, using only a laser oscillator.
Biotechnology and Bioengineering, 1997
The anammox based process ELAN ® was started-up in two different SBR reactors treating municipal ... more The anammox based process ELAN ® was started-up in two different SBR reactors treating municipal anaerobic digester supernatant. The main difference in the operation of both reactors was the dissolved oxygen (DO) concentration in the bulk liquid. SBR-1 was started at a DO value of 0.5 mg/L whereas SBR-2 was started at DO values of 3 mg/L. Despite both reactors worked at a nitrogen removal rate of 0.6 g N/(L d), in SBR-1 granules represented only a small fraction of the total biomass and reached a diameter of 1.1 mm after 7 months of operation while in SBR-2 the biomass was mainly composed by granules with an average diameter of 3.2 mm after the same operational period. Oxygen microelectrode profiling revealed that granules from SBR-2 where only fully penetrated by oxygen with DO concentrations of 8 mg/L while granules from SBR-1 were already oxygen penetrated at DO concentrations of 1 mg/L.
Optics Letters, 2001
Using tightly focused femtosecond laser pulses of just 5 nJ, we produce optical breakdown and str... more Using tightly focused femtosecond laser pulses of just 5 nJ, we produce optical breakdown and structural change in bulk transparent materials and demonstrate micromachining of transparent materials by use of unamplified lasers. We present measurements of the threshold for structural change in Corning 0211 glass as well as a study of the morphology of the structures produced by single and multiple laser pulses. At a high repetition rate, multiple pulses produce a structural change dominated by cumulative heating of the material by successive laser pulses. Using this cumulative heating effect, we write single-mode optical waveguides inside bulk glass, using only a laser oscillator.
Optics Letters, 2001
Using tightly focused femtosecond laser pulses of just 5 nJ, we produce optical breakdown and str... more Using tightly focused femtosecond laser pulses of just 5 nJ, we produce optical breakdown and structural change in bulk transparent materials and demonstrate micromachining of transparent materials by use of unamplified lasers. We present measurements of the threshold for structural change in Corning 0211 glass as well as a study of the morphology of the structures produced by single and multiple laser pulses. At a high repetition rate, multiple pulses produce a structural change dominated by cumulative heating of the material by successive laser pulses. Using this cumulative heating effect, we write single-mode optical waveguides inside bulk glass, using only a laser oscillator.