Next Article in Journal
Morphological Deformities as Biomarkers in Fish from Contaminated Rivers in Taiwan
Next Article in Special Issue
Rapid Degradation of Phenanthrene by Using Sphingomonas sp. GY2B Immobilized in Calcium Alginate Gel Beads
Previous Article in Journal
The Influence of Socioeconomic and Environmental Determinants on Health and Obesity: A West Virginia Case Study
Previous Article in Special Issue
Plant-Associated Bacterial Degradation of Toxic Organic Compounds in Soil
Open AccessArticle

13C-NMR Assessment of the Pattern of Organic Matter Transformation during Domestic Wastewater Treatment by Autothermal Aerobic Digestion (ATAD)

1
Department of Chemical and Environmental Sciences, Material and Surface Science Institute, University of Limerick, Limerick, Ireland
2
Centre for Sustainability, Sligo Institute of Technology, Sligo, Ireland
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2009, 6(8), 2288-2306; https://doi.org/10.3390/ijerph6082288
Received: 30 July 2009 / Accepted: 15 August 2009 / Published: 19 August 2009
(This article belongs to the Special Issue Biodegradability and Environmental Sciences)
Abstract: The pattern of biodegradation and the chemical changes occurring in the macromolecular fraction of domestic sludge during autothermal thermophilic aerobic digestion (ATAD) was monitored and characterised via solid-state 13C-NMR CP-MAS. Major indexes such as aromaticity, hydrophobicity and alkyl/O-alkyl ratios calculated for the ATAD processed biosolids were compared by means of these values to corresponding indexes reported for sludges of different origin such as manures, soil organic matter and certain types of compost. Given that this is the first time that these techniques have been applied to ATAD sludge, the data indicates that long-chain aliphatics are easily utilized by the microbial populations as substrates for metabolic activities at all stages of aerobic digestion and serve as a key substrate for the temperature increase, which in turn results in sludge sterilization. The ATAD biosolids following treatment had a prevalence of O-alkyl domains, a low aromaticity index (10.4%) and an alkyl/O-alkyl ratio of 0.48 while the hydrophobicity index of the sludge decreased from 1.12 to 0.62 during the treatment. These results have important implications for the evolution of new ATAD modalities particularly in relation to dewatering and the future use of ATAD processed biosolids as a fertilizer, particularly with respect to hydrological impacts on the soil behaviour. View Full-Text
Keywords: autothermal thermophilic aerobic digestion (ATAD); 13C-NMR; biosolids; biodegradation; organic matter transformation autothermal thermophilic aerobic digestion (ATAD); 13C-NMR; biosolids; biodegradation; organic matter transformation
Show Figures

Graphical abstract

MDPI and ACS Style

Piterina, A.V.; Barlett, J.; Pembroke, J. 13C-NMR Assessment of the Pattern of Organic Matter Transformation during Domestic Wastewater Treatment by Autothermal Aerobic Digestion (ATAD). Int. J. Environ. Res. Public Health 2009, 6, 2288-2306.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Search more from Scilit
 
Search
Back to TopTop