Sludge profiling at varied organic loadings and performance evaluation of UASB reactor treating sewage

Khan, Abid Ali; Mehrotra, Indu; Kazmi, Absar Ahmad

doi:10.1016/j.biosystemseng.2014.12.011

Cited by 24 publications

(9 citation statements)

References 22 publications

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“…The UASB process was developed by Lettinga and coworkers in the late 1970s [6]. It is primarily used for the treatment of highly concentrated industrial wastewaters [7][8][9]; however, it can also be used for the treatment of low strength wastewater such as municipal wastewater with relatively lower contaminant strength [10][11][12][13][14]. As compared to aerobic technologies anaerobic treatment systems such as UASB are being encouraged because of several advantages, including plain design, uncomplicated construction and maintenance, small land requirement, low construction and operating cost, low excess sludge production, robustness in terms of COD removal efficiency, ability to cope with fluctuations in temperature, pH and influent concentration, quick biomass recovery after shutdown, and energy generation in the form of biogas or hydrogen [1,9,[15][16][17][18][19].…”

Section: −1mentioning

confidence: 99%

“…It is particularly appealing in tropical countries where the comparatively high ambient temperature is nearly optimum for the mesophilic methanogenic bacteria [11,13]. Significant efforts were made in the past twenty years to ascertain the mass transfer and kinetic processes going on in the reactor.…”

Section: −1mentioning

confidence: 99%

“…There is lower gas production in sewage as compared to high strength wastewater, which leads to less circulation of gas to support the formation of biological granules. Therefore, control of channeling is important for weaker wastewaters like sewage [6,13].…”

Section: Upflow Anaerobic Sludge Blanket Reactor Processmentioning

confidence: 99%

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Review of Upflow Anaerobic Sludge Blanket Reactor Technology: Effect of Different Parameters and Developments for Domestic Wastewater Treatment

Daud

Rizvi

Akram

et al. 2018

Journal of Chemistry

110

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The upflow anaerobic sludge blanket (UASB) reactor has been recognized as an important wastewater treatment technology among anaerobic treatment methods. The objective of this study was to perform literature review on the treatment of domestic sewage using the UASB reactor as the core component and identifying future areas of research. The merits of anaerobic and aerobic bioreactors are highlighted and other sewage treatment technologies are compared with UASB on the basis of performance, resource recovery potential, and cost. The comparison supports UASB as a suitable option on the basis of performance, green energy generation, minimal space requirement, and low capital, operation, and maintenance costs. The main process parameters such as temperature, hydraulic retention time (HRT), organic loading rate (OLR), pH, granulation, and mixing and their effects on the performance of UASB reactor and hydrogen production are presented for achieving optimal results. Feasible posttreatment steps are also identified for effective discharge and/or reuse of treated water.

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Section: −1mentioning

confidence: 99%

Section: −1mentioning

confidence: 99%

See 1 more Smart Citation

Review of Upflow Anaerobic Sludge Blanket Reactor Technology: Effect of Different Parameters and Developments for Domestic Wastewater Treatment

Daud

Rizvi

Akram

et al. 2018

Journal of Chemistry

110

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show abstract

“…However, the removal efficiency increased to the range of 79-81 and 77-83%, respectively at 25-30°C, 9 h HRT and 150 days of operation. Khan et al (2015) studied performance evaluation of UASB reactor treating domestic wastewater using 60 L pilot scale reactor. The treatment efficiencies were investigated at 8 h HRT and ambient temperature ranged from 8 to 40°C.…”

Section: Domestic Wastewater Treatment In Uasb Reactormentioning

confidence: 99%

A simple anaerobic system for onsite treatment of domestic wastewater

Lohani¹,

Chhetri²,

Khanal³

2015

Afr. J. Environ. Sci. Technol.

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The use of anaerobic process for domestic wastewater treatment would achieve lower carbon footprint as it eliminates aeration and generate methane. Among several anaerobic treatment processes, high rate anaerobic digesters receive great attention due to its high loading capacity and chemical oxygen demand removal rate. Up-flow anaerobic sludge blanket reactor (UASB) is getting wide acceptance among several anaerobic processes. However, its application is still limited to industrial wastewater treatment. There are some unresolved problems to be accepted it in developing countries with lower temperature conditions for domestic wastewater treatment. Several studies have been carried out for the performance of UASB reactor but there is still lack of updated information especially on the issue of low temperature domestic wastewater treatment. Considering the gravity of the issue, an attempt have been made to compile updated information so as to help engineers, researchers and practitioners in the selection of reactors and future prospects of research.

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“…Tartakovsky et al [6] investigated biomethane production using a microalgae biomass as the substrate in an up-flow anaerobic sludge bed (UASB) and reported 80% methane at an HRT of 3.5 d. Lu et al [7] demonstrated that 60% methane can be generated within 6 h in a UASB treating starch wastewater. Khan et al [8] reported that a UASB treating sewage was able to produce 70% methane in 8 h. An investigation by Kongjan et al [9] showed that with an HRT of 36 h, a UASB treating frozen fishery wastewater was capable of producing 57-65% methane. Matsuura et al [10] observed 40-50% methane in a UASB at an HRT of 12.8 h. On the other hand, Jijai et al [11] reported that decrease in HRT would result in decreased COD removal and biogas generation.…”

Section: Introductionmentioning

confidence: 97%

Optimization of methane production process from synthetic glucose feed in a multi-stage anaerobic bioreactor

Shahperi

Din

Chelliapan

et al. 2016

Desalination and Water Treatment

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A B S T R A C TThe biological conversion of biomass into methane during anaerobic digestion has been studied by many researchers in recent years. In this study, optimization of methane composition during chemical oxygen demand removal was observed in a multi-stage Anaerobic Bioreactor. Synthetic glucose was used as a feed substrate, and the reactor was operated at a hydraulic retention time (HRT) of 1-4 d. Complementary experimental and theoretical test procedures were evaluated for methane optimization. The theoretical methane was recorded as 50.13, 50.02, 50.16, and 50.22% for an HRT of 4, 3, 2, and 1 d, respectively. However, the quantity of methane determined experimentally was significantly lower than the theoretical predictions; this was likely due to the microorganism activity in the reactor that may have interfered with the efficiency of the biogas generation. Experimental data showed a decrease in the methane composition (35.4, 21.2, 19.8, and 18.4% for HRT of 4, 3, 2, and 1 d, respectively) in the reactor system. Thus, the theoretical formula and experimental data together provide an alternative method for the evaluation of bioenergy potential in anaerobic digestion.

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Sludge profiling at varied organic loadings and performance evaluation of UASB reactor treating sewage

Cited by 24 publications

References 22 publications

Review of Upflow Anaerobic Sludge Blanket Reactor Technology: Effect of Different Parameters and Developments for Domestic Wastewater Treatment

Review of Upflow Anaerobic Sludge Blanket Reactor Technology: Effect of Different Parameters and Developments for Domestic Wastewater Treatment

A simple anaerobic system for onsite treatment of domestic wastewater

Optimization of methane production process from synthetic glucose feed in a multi-stage anaerobic bioreactor

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