Interaction effects of organic load and cycle time in an AsBr applied to a personal care industry wastewater treatment.
A mechanically stirred anaerobic sequencing batch reactor (ASBR) containing granular biomass was applied to the treatment of a wastewater simulating the effluent from a personal care industry. The ASBR was operated with cycle lengths (t(C)) of 8, 12 and 24 h and applied volumetric organic loads (AVOL) of 0.75, 0.50 and 0.25 gCOD/L.d, treating 2.0 L liquid medium per cycle. Stirring frequency was 150 rpm and the reactor was kept in an isothermal chamber at 30 °C. Increase in t(C) resulted in efficiency increase at constant AVOL, reaching 77% at t(C) of 24 h versus 69% at t(C) of 8 h. However, efficiency decreased when AVOL decreased as a function of increasing t(C), due to the lack of substrate in the reaction medium. Moreover, replacing part of the wastewater by a chemically balanced synthetic one did not yield the expected effect and system efficiency dropped.
Oliveira
Ricardo Polisaitis
RP
Escola de Engenharia Mauá, Instituto Mauá de Tecnologia, Praça Mauá 1, CEP 09.580-900, São Caetano do Sul, SP, Brazil.
Ratusznei
Suzana Maria
SM
Rodrigues
José Alberto Domingues
JA
Zaiat
Marcelo
M
Foresti
Eugenio
E
D000693:Anaerobiosis; D019149:Bioreactors; D006203:Hair Preparations; D007220:Industrial Waste; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D018505:Waste Management / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D006203:Hair Preparations; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D012967:Sodium Dodecyl Sulfate