Microbial removal from the separated liquid fraction of anaerobically digested pig manure in meso-scale integrated constructed wetlands

G. McCarthy; P. G. Lawlor; C. Harrington; G. E. Gardiner

doi:10.1016/j.biortech.2011.07.039

Microbial removal from the separated liquid fraction of anaerobically digested pig manure in meso-scale integrated constructed wetlands

G. McCarthy, P. G. Lawlor, C. Harrington, G. E. Gardiner

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The aim was to investigate microbial removal from the liquid fraction of anaerobically digested pig manure in meso-scale integrated constructed wetlands (ICW's) over a 13. month period. Four treatments were investigated: T1 (standard), T2 (effluent recycling), T3 (high nutrient loading), and T4 (high flow rate). Mean counts of yeasts and moulds and spore-forming bacteria were higher in T3 and T4 than in T1 and T2 (P<0.05). Flow through the cells reduced mean counts of coliform, yeasts and moulds and spore-forming bacteria across all treatments (P<0.01). Counts varied with season; coliform were highest in the Summer (P<0.001), with yeasts and moulds highest in the Summer and Autumn (P<0.01) and spore-formers lowest in the Autumn (P<0.001). As Salmonella was undetectable in the influent and Escherichia coli and Enterococcus were rarely detected it is difficult to make conclusions regarding pathogen removal. Further investigations using marked strains would allow pathogen tracking within the ICW's.

Original language	English
Pages (from-to)	9425-9431
Number of pages	7
Journal	Bioresource Technology
Volume	102
Issue number	20
DOIs	https://doi.org/10.1016/j.biortech.2011.07.039
Publication status	Published - Oct 2011

Keywords

Agricultural wastewater
Constructed wetlands
Enteric indicators
Pathogen
Salmonella

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2011.07.039

Cite this

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title = "Microbial removal from the separated liquid fraction of anaerobically digested pig manure in meso-scale integrated constructed wetlands",

abstract = "The aim was to investigate microbial removal from the liquid fraction of anaerobically digested pig manure in meso-scale integrated constructed wetlands (ICW's) over a 13. month period. Four treatments were investigated: T1 (standard), T2 (effluent recycling), T3 (high nutrient loading), and T4 (high flow rate). Mean counts of yeasts and moulds and spore-forming bacteria were higher in T3 and T4 than in T1 and T2 (P<0.05). Flow through the cells reduced mean counts of coliform, yeasts and moulds and spore-forming bacteria across all treatments (P<0.01). Counts varied with season; coliform were highest in the Summer (P<0.001), with yeasts and moulds highest in the Summer and Autumn (P<0.01) and spore-formers lowest in the Autumn (P<0.001). As Salmonella was undetectable in the influent and Escherichia coli and Enterococcus were rarely detected it is difficult to make conclusions regarding pathogen removal. Further investigations using marked strains would allow pathogen tracking within the ICW's.",

keywords = "Agricultural wastewater, Constructed wetlands, Enteric indicators, Pathogen, Salmonella",

author = "G. McCarthy and Lawlor, {P. G.} and C. Harrington and Gardiner, {G. E.}",

note = "Funding Information: We thank Donagh Berry for advice on statistical analysis and Laurie O{\textquoteright}Sullivan for critiquing the manuscript. Funding was provided by the Higher Education Authority Technological Sector Research Strand I Programme and the Department of Agriculture and Food{\textquoteright}s Research Stimulus Fund Programme . G. McCarthy{\textquoteright}s PhD is funded by the Teagasc Walsh Fellowship Scheme .",

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AU - Harrington, C.

AU - Gardiner, G. E.

N1 - Funding Information: We thank Donagh Berry for advice on statistical analysis and Laurie O’Sullivan for critiquing the manuscript. Funding was provided by the Higher Education Authority Technological Sector Research Strand I Programme and the Department of Agriculture and Food’s Research Stimulus Fund Programme . G. McCarthy’s PhD is funded by the Teagasc Walsh Fellowship Scheme .

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AB - The aim was to investigate microbial removal from the liquid fraction of anaerobically digested pig manure in meso-scale integrated constructed wetlands (ICW's) over a 13. month period. Four treatments were investigated: T1 (standard), T2 (effluent recycling), T3 (high nutrient loading), and T4 (high flow rate). Mean counts of yeasts and moulds and spore-forming bacteria were higher in T3 and T4 than in T1 and T2 (P<0.05). Flow through the cells reduced mean counts of coliform, yeasts and moulds and spore-forming bacteria across all treatments (P<0.01). Counts varied with season; coliform were highest in the Summer (P<0.001), with yeasts and moulds highest in the Summer and Autumn (P<0.01) and spore-formers lowest in the Autumn (P<0.001). As Salmonella was undetectable in the influent and Escherichia coli and Enterococcus were rarely detected it is difficult to make conclusions regarding pathogen removal. Further investigations using marked strains would allow pathogen tracking within the ICW's.

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Microbial removal from the separated liquid fraction of anaerobically digested pig manure in meso-scale integrated constructed wetlands

Abstract

Keywords

UN SDGs

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