UASB followed by Sub-Surface Horizontal Flow Phytodepuration for the Treatment of the Sewage  Generated by a Small Rural Community

Raboni, Massimo; Gavasci, Renato; Urbini, Giordano

doi:10.3390/su6106998

Cited by 21 publications

(16 citation statements)

References 40 publications

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“…Total and faecal coliform removal efficiencies achieved in the constructed wetland system was comparable to the efficiencies reported in the study of Ottov a et al (1997) ranging usually between 98.1 and 99.9%. Other studies also showed coliform removal efficiencies of 98.8% on average in CWs (Masi et al 2008;Raboni et al 2014).…”

Section: Pathogens Analyses Of Wetland Influent and Effluentmentioning

confidence: 82%

Assessing the performance of constructed wetland for water quality management of a Southern Mediterranean river

Saab

Jammoul

Makhlouf

et al. 2018

Water & Environment J

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Most of Southern Mediterranean water courses suffer from numerous types of pollution. This study presents a comprehensive performance assessment of a pilot CW system for removing various contaminants from the Litani River, Lebanon. The physico‐chemical, pathogens and trace metal parameters were analyzed for river water as well as for the wetland effluent. Results revealed that the average removal efficiencies were 87.01% for COD, 64.99% for BOD5, 86.18% for TSS, 43.11% for NO3N, 34.82% for NH4N, 55.07% for PO4P and 73.05% for K. The removal efficiency of faecal coliforms was around 99.84%. Influent and effluent heavy metal pollution (Cu, Pb, As and Ni) concentrations greatly exceeded the range of the environmental limit values due to industrial emissions in river water. CWs seem to be a promising green technology for Lebanon for the reduction of bacterial contamination. Further studies are required to improve treatment modules for different pollutants, including metals.

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Section: Pathogens Analyses Of Wetland Influent and Effluentmentioning

confidence: 82%

Assessing the performance of constructed wetland for water quality management of a Southern Mediterranean river

Saab

Jammoul

Makhlouf

et al. 2018

Water & Environment J

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“…The UASB-CW integration indicates the following abatement efficiencies with regard to BOD5 (92.9%), COD (79.2%), SS (94%), and fecal coliforms (98.8%) were achieved compared with single UASB treatment efficiencies shown in Fig. 6 (Raboni et al 2014). Other post-treatment techniques (Fig.…”

Section: Anaerobic (Ubf)-aerobic (Mbr) Reactormentioning

confidence: 88%

Advanced technologies for the treatment of wastewaters from agro-processing industries and cogeneration of by-products: a case of slaughterhouse, dairy and beverage industries

Alayu

Yirgu

2017

Int. J. Environ. Sci. Technol.

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Agro-industrial wastewaters are known by high strength of organic pollutants that cause an adverse effect on the water bodies. Wastewater management becomes a major task, leads environmental regulations to be stricter worldwide. Increased disposal of untreated/partially treated industrial wastewaters are major environmental problems in Ethiopia. In Ethiopia, industries most commonly dispose their untreated wastewater straight into the nearby rivers. Somewhat, constructed wetlands are used by some industries for treatment of wastewaters. The objective of this review paper was to summarize the characteristics and recent research efforts done on anaerobic treatment of some selected agro-industrial wastewaters and innovative technologies used for cogeneration of byproducts. Many developed countries designed cost effective approaches for agro-industrial wastewater management. The fullscale anaerobic treatment system in China generates 40,000 m 3 biogas daily for 20,000 households from agro-industrial wastes. Likewise, the Brewery, Addis Ababa, Ethiopia used full-scale anaerobic treatment technology and produce average methane yield of 487 Nm 3 /day. The estimated maximum methane production potential of Kera, Luna slaughterhouses, and Ada milk factory were 4.5599LCH 4 , 0.1878LCH 4 , and 0.9952LCH 4 , respectively. These indicate that they can be potential sources of biogas production. Limitations of the brewery are burning of the produced energy and some quantified parameters being become above national standards while meat processing and diary industries are discharging their wastewater without treatment into the rivers. We devised the brewery to use the produced energy properly and extend its treatment to achieve the national standards using integrated sequencing batch reactor. Similarly, slaughterhouse and diary industries should install anaerobic-aerobic integrated treatment techniques.

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“…The anaerobic bacteria in the granular sludge removes organics and is one of the most important components of the bio-reactor. At present, granule-based reactors include upflow anaerobic sludge blanket (UASB), internal circulation (IC), and expanded granular sludge blanket (EGSB) [7,8]. In developing countries, the decentralized approach has been adopted where small-scale biogas 2 of 15 plants are utilized to transform waste into gas through anaerobic fermentation of organic materials [9].…”

Section: Introductionmentioning

confidence: 99%

Biogas Production and Fundamental Mass Transfer Mechanism in Anaerobic Granular Sludge

Afridi

Younas

2019

Sustainability

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Anaerobic granules are responsible for organic degradation and biogas production in a reactor. The biogas production is entirely dependent on a mass transfer mechanism, but so far, the fundamental understanding remains poor due to the covered surface of the reactor. The study aimed at investigating the fundamental mass transfer characteristics of single anaerobic granules of different sizes using microscopic imaging and analytical monitoring under single and different organic loadings. The experiment was conducted in a micro reactor and mass transfer was calculated using modified Fick’s law. Scanning electron microscopy was applied to observe biogas production zones in the granule, and a lab-scale microscope equipped with a camera revealed the biogas bubble detachment process in the micro reactor for the first time. In this experiment, the granule size was 1.32, 1.47, and 1.75 mm, but 1.75 mm granules were chosen for further investigation due to their large size. The results revealed that biogas production rates for 1.75 mm granules at initial Chemical Oxygen Demand (COD) 586, 1700, and 6700 mg/L were 0.0108, 0.0236, and 0.1007 m3/kg COD, respectively; whereas the mass transfer rates were calculated as 1.83 × 10−12, 5.30 × 10−12, and 2.08 × 10−11 mg/s. It was concluded that higher organic loading and large granules enhance the mass transfer inside the reactor. Thus, large granules should be preferred in the granule-based reactor to enhance biogas production.

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UASB followed by Sub-Surface Horizontal Flow Phytodepuration for the Treatment of the Sewage Generated by a Small Rural Community

Cited by 21 publications

References 40 publications

Assessing the performance of constructed wetland for water quality management of a Southern Mediterranean river

Assessing the performance of constructed wetland for water quality management of a Southern Mediterranean river

Advanced technologies for the treatment of wastewaters from agro-processing industries and cogeneration of by-products: a case of slaughterhouse, dairy and beverage industries

Biogas Production and Fundamental Mass Transfer Mechanism in Anaerobic Granular Sludge

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