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Hybridized anaerobic baffled reactor has distinct advantages over many other anaerobic treatment processes. Recognition of these advantages has resulted in a broadening application and use of this system. The most significant advantage is, its ability to separate the acidogenes and methanogenes longitudinally down the reactor allowing the reactor to behave as a two phase system without the associated control problems and high cost (Weiland and Rozzi, 1991). The first full scale HABR in Egypt constructed at Demo, (10 Kms east of EL Fayoum city) to treat a wastewater discharge of about 1678 m/d, was monitored for about one year in order to investigate the applicability of this system as a low cost sanitation technology matches the Egyptian village circumstances. Results showed that the full scale HABR achieved an accepted effluent quality corresponds the Egyptian limitations, but the performance was lower than anticipated from the pilot scale HABR constructed at Nawag village. The most frequented removal ratios at HRT of 2.5 days for COD and SS were around 50% for the studied reactors, while the average removal ratios for the pilot plant were 83.12% and 83.58% for COD and suspended solids, respectively at the same HRT. |
