Anaerobic treatment of synthetic medium-strength wastewater using a multistage biofilm reactor

Ghaniyari-Benis, S.; Borja, R.; Monemian, Seyedali; Goodarzi, Vahabodin

doi:10.1016/j.biortech.2008.09.046

Cited by 46 publications

(29 citation statements)

References 24 publications

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“…Also, it can be explained that suspended solids settle, agglomerate and flow down the sloped plate surfaces, while the treated effluent is conducted upwards. Moreover, a biofilm is developed on the surface of IPS where biocatalysts such as microorganisms, particulate matters and extracellular polymers exist on the surface of an inert media or adhere with other microorganisms [13]. Similar results were obtained [14].…”

Section: Cod Fractions Bod and Tss Removalsupporting

confidence: 61%

“…The influent CODspecific CH 4 -gas production was ranged between 80-160 L/kg COD in with an average value of 120 L/kg COD in along the whole runs. In comparison to the previous studies, it is proved that the obtained values are considered in a normal range of methane production for anaerobic treatment of municipal wastewater [13,18]. Excess Sludge Characteristics…”

Section: Biogas Productionmentioning

confidence: 99%

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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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Section: Cod Fractions Bod and Tss Removalsupporting

confidence: 61%

Section: Biogas Productionmentioning

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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“…In vitro systems, on the other hand, combine the complexity of environmental conditions with proper controls in the laboratory. Several in vitro models have been developed to simulate environments where pathogens may be found, including the guts of humans (15)(16)(17) and aquatic systems (18)(19)(20). These in vitro studies have allowed researchers to gain a better understanding of the behavior of microorganisms in environmentally relevant systems.…”

mentioning

confidence: 99%

Linking Microbial Community Structure to Function in Representative Simulated Systems

Marcus

Wilder

Quazi

et al. 2013

Appl Environ Microbiol

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Pathogenic bacteria are generally studied as a single strain under ideal growing conditions, although these conditions are not the norm in the environments in which pathogens typically proliferate. In this investigation, a representative microbial community along with Escherichia coli O157:H7, a model pathogen, was studied in three environments in which such a pathogen could be found: a human colon, a septic tank, and groundwater. Each of these systems was built in the lab in order to retain the physical/ chemical and microbial complexity of the environments while maintaining control of the feed into the models. The microbial community in the colon was found to have a high percentage of bacteriodetes and firmicutes, while the septic tank and groundwater systems were composed mostly of proteobacteria. The introduction of E. coli O157:H7 into the simulated systems elicited a shift in the structures and phenotypic cell characteristics of the microbial communities. The fate and transport of the microbial community with E. coli O157:H7 were found to be significantly different from those of E. coli O157:H7 studied as a single isolate, suggesting that the behavior of the organism in the environment was different from that previously conceived. The findings in this study clearly suggest that to gain insight into the fate of pathogens, cells should be grown and analyzed under conditions simulating those of the environment in which the pathogens are present.

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“…The infl uent COD-specifi c CH 4 -gas production ranged between 80 and 160 L/kg COD in with an average value of 120 L/kg COD along the study period. In comparison with other research works, it is proved that the obtained values are considered in a normal range of methane production for anaerobic treatment of municipal wastewater [16,17].…”

Section: Biogas Productionmentioning

confidence: 70%

Packed bed up-flow anaerobic sludge blanket combined with multistage sand fine roughing filtration for municipal wastewater treatment and reuse

Abou‐Elela¹,

Fawzy²,

Abdel-Halim³

2013

Int. J. SDP

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There is a high potential for reuse of treated wastewater due to the shortage of renewable water resources for agricultural purposes in many countries of the world. To achieve this goal, an integrated anaerobic pilot plant treatment system treating almost 10 m 3 /day of wastewater was designed, manufactured and installed in a nearby wastewater treatment plant. The treatment scheme consists of a packed bed up-fl ow anaerobic sludge blanket (P-UASB) with corrugated lamella sheets, followed by inclined plate settler (IPS). However, to obtain a treated effl uent amenable for reuse, post-treatment was carried out using a multi-stage roughing fi ne fi ltration unit (MSRFF). The pilot plant was operated at average hydraulic fl ow rate of 10 m 3 /day with average organic loading rate of 3.27 kg chemical oxygen demand (COD) m 3 /day. Two retention times in P-UASB namely, 4 and 6 h were investigated. The performance of the treatment scheme was monitored via physico-chemical as well as bacteriological and parasitological analysis. Treatment of wastewater by P-UASB followed by IPS produced a high quality effl uent. Average removal rates of COD, biochemical oxygen demand (BOD) and total suspended solids (TSS) were 75, 70.6 and 91.3, respectively, with average corresponding residual values of 75, 58 and 18 mg/l. However, to obtain sustainable quality of treated effl uent for reuse, post-treatment using MSRFF improved the quality of treated wastewater both chemically and biologically. The average residual concentrations of COD, BOD and TSS were 60, 34 and 10.9 mg/l, respectively, while almost complete removal of Fecal Coliforms was achieved. The treatment scheme proved to be a very promising approach for wastewater treatment for reuse in agricultural purposes.

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Anaerobic treatment of synthetic medium-strength wastewater using a multistage biofilm reactor

Cited by 46 publications

References 24 publications

Integrated sustainable anaerobic treatment for low strength wastewater

Integrated sustainable anaerobic treatment for low strength wastewater

Linking Microbial Community Structure to Function in Representative Simulated Systems

Packed bed up-flow anaerobic sludge blanket combined with multistage sand fine roughing filtration for municipal wastewater treatment and reuse

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