Anaerobic digestion of swine effluent: Impact of production stages

Gopalan, Preethi; Jensen, Paul D.; Batstone, Damien J.

doi:10.1016/j.biombioe.2012.11.012

Cited by 22 publications

(9 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Gas composition (CH 4 , CO 2 , H 2 ) was determined by gas chromatography with thermal conductivity detector (GC-TCD) (Gopalan et al, 2013). Slurry samples were collected from each reactor twice per week and analysed for total chemical oxygen demand (COD), soluble COD (sCOD) and VFA concentration.…”

Section: Digester Performance Monitoringmentioning

confidence: 99%

Deterministic processes guide long-term synchronised population dynamics in replicate anaerobic digesters

et al. 2014

View full text Add to dashboard Cite

A replicate long-term experiment was conducted using anaerobic digestion (AD) as a model process to determine the relative role of niche and neutral theory on microbial community assembly, and to link community dynamics to system performance. AD is performed by a complex network of microorganisms and process stability relies entirely on the synergistic interactions between populations belonging to different functional guilds. In this study, three independent replicate anaerobic digesters were seeded with the same diverse inoculum, supplied with a model substrate, a-cellulose, and operated for 362 days at a 10-day hydraulic residence time under mesophilic conditions. Selective pressure imposed by the operational conditions and model substrate caused large reproducible changes in community composition including an overall decrease in richness in the first month of operation, followed by synchronised population dynamics that correlated with changes in reactor performance. This included the synchronised emergence and decline of distinct Ruminococcus phylotypes at day 148, and emergence of a Clostridium and Methanosaeta phylotype at day 178, when performance became stable in all reactors. These data suggest that many dynamic functional niches are predictably filled by phylogenetically coherent populations over long time scales. Neutral theory would predict that a complex community with a high degree of recognised functional redundancy would lead to stochastic changes in populations and community divergence over time. We conclude that deterministic processes may play a larger role in microbial community dynamics than currently appreciated, and under controlled conditions it may be possible to reliably predict community structural and functional changes over time.

show abstract

Section: Digester Performance Monitoringmentioning

confidence: 99%

Deterministic processes guide long-term synchronised population dynamics in replicate anaerobic digesters

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The methane production potential of swine manure depends on several factors, including organic matter concentrations, manure retention time inside barns and the growing phase (see Table 1; Gopalan et al, 2013;do Amaral et al, 2016;de Mito et al, 2018). The efficiency of biogas conversion into electric energy is function of the quality of the generator and swine manure characteristics, 1 m 3 of swine manure in a finishing house unit can generate between 13.7 and 22.01 kwh.…”

Section: Nutrient and Energy Potential From Swine Chain Farm Residuesmentioning

confidence: 99%

Nutritional, Energy and Sanitary Aspects of Swine Manure and Carcass Co-digestion

Tápparo

Rogovski

Cadamuro

et al. 2020

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

Renewable energy can assist the management of the effects of population growth and rapid economic development on the sustainability of animal husbandry. The primary aim of renewable energy is to minimize the use of fossil fuels via the creation of environmentally friendly energy products from depleted fossil fuels. Digesters that treat swine manure are extensively used in treatment systems; and inclusion of swine carcasses can increase the organic loading rate (OLR) thereby improving biogas yield and productivity on farms. However, the characteristics of the components including animal residues, proteins, lipids, remains of undigested feed items, antimicrobial drug residues, pathogenic microorganisms and nutrient contents, are complex and diverse. It is therefore necessary to manage the anaerobic process stability and digestate purification for subsequent use as fertilizer. Efficient methane recovery from residues rich in lipids is difficult because such residues are only slowly biodegradable. Pretreatment can promote solubilization of lipids and accelerate anaerobic digestion, and pretreatments can process the swine carcass before its introduction onto biodigesters. This review presents an overview of the anaerobic digestion of swine manure and carcasses. We analyze the characteristics of these residues, and we identify strategies to enhance biogas yield and process stability. We consider energy potential, co-digestion of swine manure and carcasses, physical, chemical, and biological pretreatment of biomass, sanitary aspects of swine manure and co-digestates and their recycling as fertilizers.

show abstract

“…Influence of stratified swine manure on biogas/methane yield Significant differences (p < 0.05) in biogas yield between the swine manure samples from the stratified swine production phases were observed in this study. The differences in VS bioavailability (Table 2) for anaerobic microorganisms among different types of swine manure samples may be caused by different feed strategies and nutrient digestibility, as well as differences in manure management within the facility (Brooks et al, 2014;Gopalan et al, 2013).…”

Section: Kinetic Aspectsmentioning

confidence: 99%

“…Swine manure characteristics are a function of several factors, such as swine age, diet (feeding and antibiotic) and house design (Brooks et al, 2014). The variability in the methane potential of effluent streams can be associated with changes in production management practices, such as feed, feeding techniques and effluent handling methods (Amaral et al, 2014;Gopalan et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Influence of solid–liquid separation strategy on biogas yield from a stratified swine production system

Amaral

Kunz

Steinmetz³

et al. 2016

Journal of Environmental Management

View full text Add to dashboard Cite

As the fourth largest swine producer and exporter, Brazil has increased its participation in the global swine production market. Generally, these units concentrate a large number of animals and generate effluents that must be correctly managed to prevent environmental impacts, being anaerobic digestion is an interesting alternative for treating these effluents. The low-volatile solid concentration in the manure suggests the need for solid-liquid separation as a tool to improve the biogas generation capacity. This study aimed to determine the influence of simplified and inexpensive solid-liquid separation strategies (screening and settling) and the different manures produced during each swine production phase (gestating and farrowing sow houses, nursery houses and finishing houses) on biogas and methane yield. We collected samples in two gestating sow houses (GSH-a and GSH-b), two farrowing sow houses (FSH-a and FSH-b), a nursery house (NH) and a finishing house (FH). Biochemical methane potential (BMP) tests were performed according to international standard procedures. The settled sludge fraction comprised 20-30% of the raw manure volume, which comprises 40-60% of the total methane yield. The methane potential of the settled sludge fraction was approximately two times higher than the methane potential of the supernatant fraction. The biogas yield differed among the raw manures from different swine production phases (GSH-a 326.4 and GSH-b 577.1; FSH-a 860.1 and FSH-b 479.2; NH -970.2; FH 474.5 NmLbiogas.gVS(-1)). The differences were relative to the production phase (feed type and feeding techniques) and the management of the effluent inside the facilities (water management). Brazilian swine production has increased his participation in the global market, been the fourth producer and the fourth exporter. The segregation of swine production in multiple sites has increased its importance, due to the possibilities to have more specialized units. Generally, these units concentrate a large number of animals and generate effluents that must be correctly managed to avoid environmental impact. Due to the biodegradability of manure, anaerobic digestion is an interesting alternative to treat these effluents. The low volatile solid concentration in the swine manure suggests the need for solid-liquid separation as a tool to improve biogas generation capacity. The present study aimed to determine the influence of simplified and cheap solid-liquid separation strategies (based on screening and settling) and different manure of each swine production phases (gestating and farrowing sows houses, nursery houses and finishing houses) on biogas and methane yield. We collected samples in two gestating sows house (GSH-a and GSH-b), two farrowing sows house (FSH-a and FSH-b), a nursery house (NH) and a finishing house (FH). The Biochemical Methane Production (BMP) tests were performed according to international standard procedure (VDI 4630). The settled sludge fraction responds for 20-30% of raw manure volume, producing 40-60% of the to...

show abstract

Anaerobic digestion of swine effluent: Impact of production stages

Cited by 22 publications

References 19 publications

Deterministic processes guide long-term synchronised population dynamics in replicate anaerobic digesters

Deterministic processes guide long-term synchronised population dynamics in replicate anaerobic digesters

Nutritional, Energy and Sanitary Aspects of Swine Manure and Carcass Co-digestion

Influence of solid–liquid separation strategy on biogas yield from a stratified swine production system

Contact Info

Product

Resources

About