Abstract
The consumption of large volumes of water and the generation of organic compounds as liquid effluents are major environmental problems in sugar cane processing industry. The aim of this work is to study the treatment of synthetic sugar wastewater by a downflow stationary fixed film (DSFF) reactor. The reactor was fabricated and packed with polyvinyl chloride pipe pieces and it was air tight sealed to maintain anaerobic conditions. The ambient room temperature during the study period was between 29 and 33 °C. Start-up period required by the reactor was 3 weeks. Initially a hydraulic retention time (HRT) of 48 h was set, HRT was decreased when the reactor reached steady state. BOD and COD removal increased as the HRT decreased from 48 to 12 h. BOD and COD removal was 79 and 81.8 % respectively at 12 h HRT. A decline in removal was noticed when the HRT was set to 6 h. Biogas production was 445 ml/day at 12 h HRT. Differential staining was carried out, it revealed that the micro-organisms belong to gram negative class. Thus DSFF reactor can be used for treating sugar wastewater and for producing biogas.
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