Evaluation of decentralized treatment of sewage employing Upflow Septic Tank/Baffled Reactor (USBR) in developing countries

Sabry, Tarek

doi:10.1016/j.jhazmat.2009.09.080

Cited by 45 publications

(27 citation statements)

References 5 publications

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“…However, the UASB reactor and its variants have been suggested as a feasible alternative (AL-SHAYAH & MAH-MOUD, 2008;SABRY, 2010;MOUSSAVI;KAZZEMBEIGI;FARZADKIA, 2010).…”

Section: Introductionmentioning

confidence: 99%

Infiltration studies on soakaways receiving effluents from single household UASB and septic tank reactors

Júnior

Sousa

Santos

et al. 2017

Rev. Bras. Ciênc. Ambient. (Online)

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Clogging tendency has been analyzed in sandy soil soakaways at pilot scale receiving either septic tank effluent (SUM1) or UASB effluent (SUM2) and also at laboratory scale (SUMB1 and SUMB2), in relation to Chemical Oxygen Demand (COD) and accumulated Suspended Solids (SS) concentrations. Clogging was also estimated, by modeling the predicted time for infiltration hydraulic failure. The laboratory results obtained with SUMB1 and SUMB2 confirmed the results obtained for SUM1 and SUM2, showing that soakaways built in sandy soils which receive effluent from septic tanks treating predominantly domestic wastewater tended to clog 58% faster than those receiving UASB effluent. The good correlation observed between the decrease in average infiltration rate and the time of operation suggests that the UASB reactor is a promising technological alternative to septic tanks as a pre-treatment prior to effluent soil disposal for on-site decentralized wastewater treatment systems.Keywords: decentralized treatment; UASB; septic tank; infiltration; sandy soil. RESUMOO trabalho objetivou comparar o tempo para ocorrer a colmatação de sumidouros (SUM1 e SUM2) contendo areia média, alimentados respectivamente por efluentes de tanque séptico e de um reator UASB, em escala piloto e com replicação confirmativa em escala de bancada (SUMB1 e SUMB2), quanto ao impacto da concentração acumulada de Demanda Química de Oxigênio (DQO) e dos Sólidos Suspensos Totais (SST) na colmatação do meio, em função do tempo. Estimou-se ainda, por meio de um modelo, a predição do tempo para a falha hidráulica. A colmatação do SUMB1 à frente do SUMB2 confirmou os resultados de campo obtidos para os SUM1 e SUM2, demonstrando que sumidouros construídos e operados recebendo esgoto doméstico tratado em tanque séptico em solos arenosos tenderão a colmatar 58% mais rápido do que aqueles com tratamento prévio em reatores UASB. A boa correlação entre o decréscimo da taxa média de infiltração nos sumidouros em função de período de operação sugere o reator UASB como promissora alternativa aos tanques sépticos para disposição de efluentes no solo em sistemas descentralizados unifamiliares de tratamento de esgotos.Palavras-chave: tratamento descentralizado; reator UASB; Tanque Séptico; infiltração; solo arenoso.

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“…However, the UASB reactor and its variants have been suggested as a feasible alternative (AL-SHAYAH & MAH-MOUD, 2008;SABRY, 2010;MOUSSAVI;KAZZEMBEIGI;FARZADKIA, 2010).…”

Section: Introductionmentioning

confidence: 99%

Infiltration studies on soakaways receiving effluents from single household UASB and septic tank reactors

Júnior

Sousa

Santos

et al. 2017

Rev. Bras. Ciênc. Ambient. (Online)

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“…Traditional and modern technologies have been used for decentralized sewage treatment (Moussavi et al, 2010;Sabry, 2010). For example, many individual residences in rural areas rely on septic tanks to dispose of their wastewater.…”

Section: Introductionmentioning

confidence: 99%

Multi-Soil-Layering Systems for Wastewater Treatment in Small and Remote Communities

An¹

2015

J ENV INFORM

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ABSTRACT. Large portions of domestic wastewater in small and remote communities are discharged into the environment without effective treatment. In areas with low population densities and dispersed households, wastewater system strategies are needed which are environmentally, socially and economically sustainable. A wastewater treatment technique known as a multi-soil-layering (MSL) system is shown to be a promising wastewater treatment and disposal method. A full-scale, land-based approach developed from the most recent efforts in this emerging field is described. A brief description of the mechanisms in the treatment process within the MSL system, as well as the design and operation for the MSL system, are provided. The state-of-the-art and development trends of MSL process for the wastewater treatment are further introduced.

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“…Sabry [6] used upflow septic tank / Baffled reactor system which produced an average removal values of COD, BOD and TSS of 84%, 81% and 89%, respectively at a retention time of 20 hrs. Also, Gopala et al [7] studied the performance of 10 L laboratory scale ABR operated for almost 600 days at a temperature ranging from 20…”

Section: Introductionmentioning

confidence: 99%

“…• C for treating low strength complex wastewater of COD 500 mgO 2 /l at HRTs of 20, 15,10,8,6 hrs with corresponding organic rates of 0.8, 1.2, 1.5 and 2 kgCOD/m 3 /day. The removal efficiencies of COD and BOD exceeded 88%.…”

Section: Introductionmentioning

confidence: 99%

Integrated sustainable anaerobic treatment for low strength wastewater

Abou‐Elela¹,

Fawzy²,

El-Khateeb³

et al. 2011

WIT Transactions on Ecology and the Environment

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The main objective of this study is to demonstrate and implement a cost effective system for low strength municipal wastewater treatment in rural areas. An integrated compact anaerobic treatment pilot plant unit was designed, constructed and operated for almost two years. The pilot plant consists of three successive compartments mainly; primary sedimentation (PS), packed bed up flow anaerobic sludge blanket (P-UASB) and inclined plate settler (IPS). The pilot plant was operated continuously at a hydraulic loading rate of 6m 3 /day, average organic loading rate of 2.5 kg COD/m 3 /day and average retention time of 4 hrs at the P-UASB and a total retention time 6 hrs for the integrated treatment unit. The performance of the treatment train was monitored via physico-chemical as well as bacteriological and parasitological analysis. The average removal rates of chemical oxygen demand (COD), biological oxygen demand (BOD 5 ) and total suspended solids (TSS) were 78%, 79% and 91%, respectively with corresponding average residual values of 71 mgO 2 /l, 39 mgO 2 /l and 18 mg/l. Pathogenic analysis indicated that great majorities were removed but still some residuals exist. The treated wastewater, after disinfection, was complying with the Egyptian Code for wastewater reuse in restricted irrigation. The results indicated that the total life cost of the pilot plant, during the research period, proved to be a cost-effective process for treating low strength wastewater. Keywords: low strength wastewater, anaerobic treatment, packed upflow anaerobic sludge blanket, inclined plate settler.

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Evaluation of decentralized treatment of sewage employing Upflow Septic Tank/Baffled Reactor (USBR) in developing countries

Cited by 45 publications

References 5 publications

Infiltration studies on soakaways receiving effluents from single household UASB and septic tank reactors

Infiltration studies on soakaways receiving effluents from single household UASB and septic tank reactors

Multi-Soil-Layering Systems for Wastewater Treatment in Small and Remote Communities

Integrated sustainable anaerobic treatment for low strength wastewater

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