Nitrification and microbiological evolution during aerobic treatment of municipal solid wastes

Zeng, Yang; Guardia, A. de; Ziebal, Christine; Macedo, Flávia Junqueira De; Dabert, Patrick

doi:10.1016/j.biortech.2012.01.135

Cited by 62 publications

(36 citation statements)

References 33 publications

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“…During the aerobic processing of waste, simultaneous nitrification and denitrification, leading to the decrease of ammonium nitrogen [40,41] produced during the mineralisation of substances containing organic nitrogen, i.e. proteins, amino acids and urea in the process of ammonification can be observed [13]. During the biological processing of organic matter, the microorganisms involved in the waste treatment process use part of the ammonium acid for biomass synthesis, the remained is released into the atmosphere [42], which is the cause of multiple problems, i.e.…”

Section: Resultsmentioning

confidence: 99%

Microbiological and Energetic Assessment of the Effects of the Biodrying of Fuel Produced from Waste

Malinowski

Wolny-Koładka

2017

Ecological Chemistry and Engineering S

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Biological drying (biodrying) is one of the methods of biological processing of waste, used mainly as part of the mechanical biological treatment of mixed municipal waste. Biological drying uses the heat released during the decomposition of organic matter to reduce the amount of water in dried waste. The aim of the analyses was to provide a microbiological and energetic (fuel) assessment of the process of biodrying of alternative fuel (RDF) obtained by mechanical sorting of mixed municipal waste. The resulting alternative fuel (obtained with just sorting) is characterised by varied moisture content and the presence of diverse groups of microorganisms. The analyses were intended to assess 3 alternative methods of biodrying of alternative fuel in order to produce a stable end product for utility power generation and the cement industry. The analyses were performed using special bioreactors equipped with custom (innovative) fluidised bed, aeration system (air flow rate 500 m 3 · h -1 ), effluents drain systems, post-process air offtake and 4 temperature sensors. The assessment of the impact of the employed bed aeration methods on the quality of the alternative fuel was performed in 3 repetitions with the same external parameters. The obtained results show that after 8 days of biodrying, in the most favourable option, the moisture content in the fuel was reduced to the level of 18.7%, i.e. by 39%, the resulting fuel was microbiologically stable and the calorific value of the fuel was increased on average by 3.2 MJ · kg -1 .

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Section: Resultsmentioning

confidence: 99%

Microbiological and Energetic Assessment of the Effects of the Biodrying of Fuel Produced from Waste

Malinowski

Wolny-Koładka

2017

Ecological Chemistry and Engineering S

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“…, as an intermediate between NH 2 OH and NO À 2 (Czepiel et al 1996). Ammoniaoxidising archaea (AOA) have been recently suggested to be actively involved in nitrification in composting piles but the contribution of AOA to the total amount of N 2 O still remains unclear (Yamamoto et al 2010;Zeng et al 2012).…”

Section: Nitrous Oxide (N 2 O)mentioning

confidence: 99%

Greenhouse gas emissions from organic waste composting

et al. 2015

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There is actually a common consensus in using biological technologies for the treatment of organic wastes. For instance, composting is used for aerobic biological stabilisation of organic wastes. The amount of materials and the variety of wastes composted are increasing. However, composting is inherently a process generating gaseous emissions. Greenhouse gases (GHG) such as carbon dioxide, methane and nitrous oxide from compost are of special relevance for global warming. Although a part of these gases is inherent to the process, another important part can be abated by low-cost biological technologies such as biofiltration and its variations. This article reviews the emission of GHG from composting gases, from detection and measurement to minimisation and abatement. Special emphasis is given to the measurement of GHG to obtain reliable emission factors for the different composting technologies. These factors will help to compare different waste treatment options based on overall analysis tools such as life cycle assessment. A specific chapter is related to carbon and nitrogen dynamics in the composting matrix, and their consequences on the production of carbon and nitrogen gases. Finally, we present a review of the best available practices to minimise the GHG emissions from composting and the final treatment of composting offgases.

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“…All ammonia oxidizers can be classified in the b-subclass of Proteobacteria with the exception of Nitrosococcus, which belongs to a distinct branch of the c-subclass. The NOB can be found within the a-and c-subclasses of Proteobacteria, with the exceptions of Nitrospira, which has its own distinct phylum (Duan et al 2013), and Nitrospina, which belongs to the d-subclass of Proteobacteria (Zeng et al 2012) (Fig. 2).…”

Section: Nitrifying Bacterial Population (Aob and Nob)mentioning

confidence: 99%

Ecophysiology of nitrifying communities in membrane bioreactors

Awolusi

Kumari

Bux

2014

Int. J. Environ. Sci. Technol.

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Membrane bioreactors (MBRs) are rapidly becoming the technology of choice over conventional activated sludge treatment systems due to their smaller footprint, reduced sludge production, rapid start-up of biological processes, complete removal of suspended solids and better effluent quality. The retention of sufficient amount of slow-growing nitrifiers makes it feasible for the MBRs to achieve strong tolerance against the shock loads with stable and highly efficient nitrogen removal. Various studies have focused on the ecophysiology of nitrifiers in MBRs as well as their distinctive operational parameters as well as their impact on the selection and activity of nitrifying community. Several techniques have been employed over the years to understand the nitrifying community and their interaction within the MBR system, which led to its modification from the initial design. This review focuses on the identification of optimal operational and environmental conditions for efficient nitrification in MBRs. The advantages and limitations of different techniques employed for investigating the nitrifying communities in MBRs are also emphasized.

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Nitrification and microbiological evolution during aerobic treatment of municipal solid wastes

Cited by 62 publications

References 33 publications

Microbiological and Energetic Assessment of the Effects of the Biodrying of Fuel Produced from Waste

Microbiological and Energetic Assessment of the Effects of the Biodrying of Fuel Produced from Waste

Greenhouse gas emissions from organic waste composting

Ecophysiology of nitrifying communities in membrane bioreactors

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