Septic tank combined with anaerobic filter and conventional UASB: results from full scale plants

Brazilian Journal of Chemical Engineering

F. J. A. Da Silva¹  M. G. S. Lima¹  L. A. R. Mendonça¹  M. J. T. L. Gomes¹ 

[1] ,Federal University of Ceará Department of Civil Engineering Juazeiro do Norte CE ,Brazil

关键词: Anaerobic treatment;    Low-cost technology;    Performance comparison;   

DOI  :  10.1590/S0104-66322013000100015

来源: SciELO

【 摘 要 】

Anaerobic digestion is an important alternative for domestic wastewater treatment, especially in warm climate regions. Two full-scale anaerobic schemes were investigated: septic tank combined with anaerobic filter (S T A NF) and conventional UASB reactors. Treated effluents from these systems were subjected to disinfection by chlorination. The operational performance of 56 full-scale plants (36 S T A NF and 20 UASB) provided a realistic view. Findings showed that the plants operated with low OLR (< 2.0 kg COD/m³.day). Despite this, the removal of organic material was below values suggested by the literature (around 60% for COD). A removal of 4.0 Log10 units of total coliform and E. coli can be reached with residual chlorine (R CL) of at least 2.0 Cl-Cl2/l. Although UASB plants have performed better, improvement of maintenance is needed in both treatment configurations.

【 授权许可】

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