Biological nutrient removal in a small-scale MBR treating household wastewater

Abegglen, Christian; Ospelt, Mario; Siegrist, Hansruedi

doi:10.1016/j.watres.2007.07.020

Cited by 106 publications

(48 citation statements)

References 15 publications

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“…Use of membrane systems in decentralized treatment of household (domestic) wastewater was described by several researchers [38,39]. When properly operated, MBRs have also shown the capability to effectively remove nutrients [40,41] and-to some degree-micropollutants [42]. Depending on the pore size of the adopted membrane, MBRs may effectively remove pathogens, directly meeting water recycling standards without further disinfection.…”

Section: Membrane Biological Reactors (And Related Technologies)mentioning

confidence: 99%

Integrated, Decentralized Wastewater Management for Resource Recovery in Rural and Peri-Urban Areas

Capodaglio

2017

Resources

162

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Collection and treatment of wastewater have a huge impact on the environment and economy, both at the local and global levels. Eco-innovation may play a paramount role in the reduction of the environmental impact of such systems, and in their greater sustainability in economic, environmental, and social terms. Decentralization appears as a logical solution to tackle sustainability problems of wastewater management systems, as it focuses on the on-site treatment of wastewater and on local recycling and reuse of resources contained in domestic wastewater (in primus, water itself). This paper analyses the needs, technological options and contribution to water management of decentralized systems. Decentralized solutions in general will tend to be compatible with local water use and reuse requirements, where locally treated water could support agricultural productivity or (in more urban areas) be used as a substitute for drinking-quality supply water for compatible uses. In analyzing sustainability of technology, different dimensions should be taken into account (in particular, local issues). There is no fixed or universal solution to the technological issue; to the contrary, all relevant studies demonstrated there are varying degrees of sustainability in the way a technology is selected and operated, to avoid exporting problems over time or space.

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Section: Membrane Biological Reactors (And Related Technologies)mentioning

confidence: 99%

Integrated, Decentralized Wastewater Management for Resource Recovery in Rural and Peri-Urban Areas

Capodaglio

2017

Resources

162

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“…Sand filters were mainly buried filters made by local entrepreneurs using local sand and gravel, but commercial pipes and pumps, and they were typically 1.5-2.5 m deep. They were divided into filters with and without specific P-binding material sites, and There are recent analytical works which document the long-term performances of one or a few small-scale treatment units or sand filters [6][7][8][9][10][11][12]. In addition, the carbon footprint of different on-site wastewater treatment systems has been evaluated [13], and there is one questionnaire study, which inquired about the performance of many different on-site treatment systems [14].…”

Section: Selected Wastewater Treatment Unit Effluentsmentioning

confidence: 99%

“…High P-concentrations can also be attributed to a situation in which phosphorus accumulating microorganisms had initially incorporated phosphorus into cellular polyphosphates, but had subsequently released P as phosphate into the effluent if there was no wastewater load, or if the conditions had changed to being anoxic or anaerobic [6,35]. When the daily P load has been increased to twice or three times the normal load, the biological removal efficiency of P will almost disappear, whereas the biological removals of N and C are less sensitive since the microorganisms needed to remove N or C can be reactivated again after the stress situation has ended [8].…”

Section: Commercial Plants Need To Receive More Attention Especiallymentioning

confidence: 99%

Chemical and Microbiological Quality of Effluents from Different On-Site Wastewater Treatment Systems across Finland and Sweden

Heinonen‐Tanski

Matikka

2017

Water

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Domestic wastewaters, which cannot be disposed through sewage networks, must be treated with different on-site treatment systems; these are usually commercial, small-scale treatment plants or built sand filters. These systems are usually maintained by the house's inhabitants. This study was achieved by analysing the chemical and microbiological data of 717 effluents collected in Finland and Sweden. There were inadequate reductions in 31% of phosphorus effluents, 22% of nitrogen effluents and 5% of biological oxygen demand compounds. The addition of a coagulant capable of precipitating phosphorus improved the performance of sand filters and biorotors. There are no legally binding limitations on the number of enteric microorganisms that can be present in an effluent, but the number of Escherichia coli and enterococci exceeded more than 100 colony forming units per 100 mL in 59% and 53% effluents studied, with the highest numbers for these indicators being more than 100,000 cfu per 100 mL. The number of E. coli and enterococci were lower when the concentration of phosphorus in effluent was less than 1 mg/L. The treatment efficiency varied extensively, even between similar plant models, possibly due to either irregular use, or after long pauses, when they were not being used. In addition, it is possible that the end users are not capable of properly maintaining these wastewater treatment plants.

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“…However, no observable additional decline in either COD or nutrient removal was noted during this period. Feed equalisation may be considered to avoid shock loads from diurnal variations as reported in the treatment of highly fluctuating raw sewage using a 2-chamber MBR (Abegglen et al, 2008). Further, the option of anoxic or anaerobic operation in the absence of feed inflow also needs to be examined to minimise biomass decay.…”

Section: Issues In Operationmentioning

confidence: 99%

Field testing of polymeric mesh and ash-based ceramic membranes in a membrane bioreactor (MBR) for decentralised sewage treatment

Tewari

Singh

Batra

et al. 2012

WSA

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This paper presents the initial findings of field testing of 2 low-cost membrane filters, viz. 30 μm polymeric mesh and 2-6 μm macroporous waste-ash based ceramic filter, in a submerged membrane bioreactor (MBR) employing batch anoxic and aerobic conditions. The influent was raw wastewater from a residential complex located near Delhi, India. The results indicated that the ceramic filter was able to operate for longer periods without cleaning; however, there is a limit to the transmembrane pressure it can withstand. The suspended solids retention was high with both filters (average of 96%). Moderate reduction in chemical oxygen demand (COD), total nitrogen (NH 4 + ) and total phosphorus (PO 4 3-) was achieved. The improvements in operation required in such systems are also underlined.

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Biological nutrient removal in a small-scale MBR treating household wastewater

Cited by 106 publications

References 15 publications

Integrated, Decentralized Wastewater Management for Resource Recovery in Rural and Peri-Urban Areas

Integrated, Decentralized Wastewater Management for Resource Recovery in Rural and Peri-Urban Areas

Chemical and Microbiological Quality of Effluents from Different On-Site Wastewater Treatment Systems across Finland and Sweden

Field testing of polymeric mesh and ash-based ceramic membranes in a membrane bioreactor (MBR) for decentralised sewage treatment

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