Do Alternate Bacterial Indicators and Pathogens Increase after Centrifuge Dewatering of Anaerobically Digested Biosolids?

Chen, Yen Chih; Murthy, Sudhir; Hendrickson, Donald; Higgins, Matthew J.

doi:10.2175/106143010x12851009156763

Cited by 6 publications

(8 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a study evaluating the regrowth of bacteria after dewatering of thermophilic and mesophilically digested biosolids, in general, for thermophilic processes, even when a statistically significant (p < 0.05) sudden increase and regrowth in fecal coliforms, E. coli and enterococci, that was not seen for Salmonella or Aeromonas spp. (Chen et al, 2011). In contrast, for the mesophilic process evaluated, while regrowth occurred for coliforms, enterococci and Salmonella, it did not appear to occur for aeromonads.…”

Section: Biosolids/sewage Sludge Treatmentmentioning

confidence: 72%

Aeromonas

Salvat¹,

Ashbolt²

2019

Water and Sanitation for the 21st Century: Health and Microbiological Aspects of Excreta and Wastewater Management (Global Wate

View full text Add to dashboard Cite

Section: Biosolids/sewage Sludge Treatmentmentioning

confidence: 72%

Aeromonas

Salvat¹,

Ashbolt²

2019

Water and Sanitation for the 21st Century: Health and Microbiological Aspects of Excreta and Wastewater Management (Global Wate

View full text Add to dashboard Cite

“…Traditional processing methods may affect regrowth of harmful microbes from AD effluent. For example, regrowth of fecal coliforms, E. coli and Enterococci, occurred after Chen et al (2011) dewatered thermophilic and mesophilic AD effluent by centrifugation (Chen et al, 2011). In a similar study, Erkan and Sanin (2013) showed that belt filter dewatering caused 0.6 log decreases in indicator organisms, while 0.7-1.4 log increases occurred after centrifugation.…”

Section: Pathogen Regrowthmentioning

confidence: 82%

Beyond land application: Emerging technologies for the treatment and reuse of anaerobically digested agricultural and food waste

et al. 2015

View full text Add to dashboard Cite

Effective treatment and reuse of the massive quantities of agricultural and food wastes generated daily has the potential to improve the sustainability of food production systems. Anaerobic digestion (AD) is used throughout the world as a waste treatment process to convert organic waste into two main products: biogas and nutrient-rich digestate, called AD effluent. Biogas can be used as a source of renewable energy or transportation fuels, while AD effluent is traditionally applied to land as a soil amendment. However, there are economic and environmental concerns that limit widespread land application, which may lead to underutilization of AD for the treatment of agricultural and food wastes. To combat these constraints, existing and novel methods have emerged to treat or reuse AD effluent. The objective of this review is to analyze several emerging methods used for efficient treatment and reuse of AD effluent. Overall, the application of emerging technologies is limited by AD effluent composition, especially the total solid content. Some technologies, such as composting, use the solid fraction of AD effluent, while most other technologies, such as algae culture and struvite crystallization, use the liquid fraction. Therefore, dewatering of AD effluent, reuse of the liquid and solid fractions, and land application could all be combined to sustainably manage the large quantities of AD effluent produced. Issues such as pathogen regrowth and prevalence of emerging organic micro-pollutants are also discussed.

show abstract

“…Because fecal coliform are indicators, however, it does not mean that the biosolids do not meet the criteria for Salmonella, which represent actual pathogens. The companion paper to this one explores sudden increase and regrowth of Salmonella and other pathogens and indicator bacteria (see Chen et al, 2011).…”

Section: Research Implicationsmentioning

confidence: 99%

The Effect of Digestion and Dewatering on Sudden Increases and Regrowth of Indicator Bacteria after Dewatering

Chen

Murthy

Hendrickson³

et al. 2011

Water Environment Research

Self Cite

View full text Add to dashboard Cite

Several Investigators have reported higher densities of indicator bacteria after dewatering of anaerobically digested biosolids. The increases appear to occur at two points in the biosolids process: the first, referred to as "sudden increase", occurs immediately after dewatering; the second, "r'J|^wth", occurs during storage over longer periods. The objectives of digestion and dewatering fecal coliform and £, coll. and five mesophiiic digesf ilter press dewatering, Suj thermophilic processes witj in the mesophilic processj dewatering, Regrowth was processes with centrifuge dŴ ater Environ. Res., 83, 7' [is study were to examine the effect of resses on sudden increase and regrowth of i)les were collected from five thermophilic lorocesses, with either centrifuge or belt increase typically was observed in the Ktrifuge dewatering and was not observed fith either centrifuge or belt filter press feerved in both thermophilic and mesophilic latering but not belt filter press dewatering, 12011),

show abstract

Do Alternate Bacterial Indicators and Pathogens Increase after Centrifuge Dewatering of Anaerobically Digested Biosolids?

Cited by 6 publications

References 35 publications

Aeromonas

Aeromonas

Beyond land application: Emerging technologies for the treatment and reuse of anaerobically digested agricultural and food waste

The Effect of Digestion and Dewatering on Sudden Increases and Regrowth of Indicator Bacteria after Dewatering

Contact Info

Product

Resources

About