Nitrogen Dynamic and Microbiological Evolution During Aerobic Treatment of Digested Sludge

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

doi:10.1007/s12649-013-9275-2

Cited by 9 publications

(5 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analyses of the microbiological contamination of air, water and soil in municipal objects (sewage treatment plants, landfills, composting plants) and in their immediate surroundings are performed [19][20][21][22][23][24]. Studies concerning the number of microorganisms in alternative fuel (RDF) produced from municipal solid waste are still not numerous [25,26].…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

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 .

show abstract

Section: Introductionmentioning

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

View full text Add to dashboard Cite

show abstract

“…The second N org mineralization peak was however much smaller in composting of digested sludge (Zeng et al . ). Considering there was not second peak of O 2 consumption in the present work, we believe decomposition of slowly biodegradable N org or biomass only contributed for a small part of the second mineralization peak.…”

Section: Resultsmentioning

confidence: 97%

Impact of the addition of a nitrifying activated sludge on ammonia oxidation during composting of residual household wastes

Zeng

Dabert²,

Roux³

et al. 2014

J Appl Microbiol

View full text Add to dashboard Cite

The mixing of activated sludge with RHW before composting is a common practice on composting plants. This study proved the limitation of this practice to reduce ammonia emissions during composting via bioaugmentation of ammonia-oxidizing organisms. It correlated successfully the ammonia oxidation rate with different groups of ammonia oxidizers and explains the fail of promoting ammonia oxidation during the early stages of composting. It suggests Nit. europaea/eutropha and Nit. nitrosa-like AOB were the main contributors to ammonia oxidation during composting.

show abstract

“…The pH value increased from 8.1 to 9.0 in the swine manure, from 8.0 to 8.6 in the cow manure, and from 8.4 to 9.4 in the chicken manure during the first 10 days, respectively. The increase in the pH value significantly promoted the transformation from to NH 3 in the /NH 3 pool, and improved NH 3 emission 24 25 26 27 28 . Furthermore, the moisture reduced by 59.1% in the swine manure, 51.7% in the cow manure and 64.9% in the chicken manure during the first 10 days.…”

Section: Resultsmentioning

confidence: 99%

“…There are several possible inhibitions for the nitrifying bacteria in the active composting stage. These are high temperature, low DO and ORP level in the manure particle, high /NH 3 and available substrate content and competition among different microbial groups 24 25 26 27 28 . These factors could substantially retard the growth of nitrifying bacteria.…”

Section: Discussionmentioning

confidence: 99%

“…Although the consumption of the bulking agents greatly increases the operational cost, the issue of nitrogen loss has not been well resolved. It was reported that the ammonification and nitrification of microorganisms play important roles on the nitrogen loss in the composting matrix 25 26 27 28 . However, the manure particle is the basic unit of the composting matrix, and the spatial distribution characteristics of microbial nitrogen transformation in the interior of manure particle have not been understood.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Spatial nitrifications of microbial processes during composting of swine, cow and chicken manure

Wang

WeiGuang

et al. 2015

Sci Rep

View full text Add to dashboard Cite

Composting is a widely-used method to recycle the nutrients in livestock manure for agriculture. The spatial stratifications of microbial processes inside the manure particle that determine organic and nitrogen transformation are virtually unclear. Here, we show the evolution of the interior microenvironment of swine, cow and chicken manure by using microelectrodes during forced-aeration composting. Composting has generally been regarded as an aerobic bioprocess, however, the long-existing of a large anoxic zone inside these manures was confirmed during the active phase in this study. The profile of the oxidation–reduction potential dramatically decreased first and then gradually increased. The spatial difference in the ammonia concentration was not significant, but nitrate concentration continuously decreased with depth. The anoxic condition within the manure particle was demonstrated to be a primary cause of the severe ammonia emission and the long composting period. These founding provided a new insight toward “aerobic” composting process and a sound foundation for the development of efficient composting technology.

show abstract

Nitrogen Dynamic and Microbiological Evolution During Aerobic Treatment of Digested Sludge

Cited by 9 publications

References 27 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

Impact of the addition of a nitrifying activated sludge on ammonia oxidation during composting of residual household wastes

Spatial nitrifications of microbial processes during composting of swine, cow and chicken manure

Contact Info

Product

Resources

About