Swine waste treatment by self-heating aerobic thermophilic bioreactors

Juteau, Pierre; Tremblay, Danielle; Ould-Moulaye, Cheikh-Baye; Bisaillon, Jean‐Guy; Beaudet, Réjean

doi:10.1016/j.watres.2003.11.001

Cited by 71 publications

(51 citation statements)

References 18 publications

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“…The most commonly used treatment methodologies for both municipal and agricultural wastes are aerobic and anaerobic digestion (11,29,34,36). Previous studies have shown these techniques to be effective for organic matter, nutrient (19,33), and pathogen (13) reduction, but little is known about the microbial population dynamics associated with these processes.…”

mentioning

confidence: 99%

Bacterial Population Dynamics in Dairy Waste during Aerobic and Anaerobic Treatment and Subsequent Storage

McGarvey

Miller

Zhang³

et al. 2007

Appl Environ Microbiol

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The objective of this study was to model a typical dairy waste stream, monitor the chemical and bacterial population dynamics that occur during aerobic or anaerobic treatment and subsequent storage in a simulated lagoon, and compare them to those of waste held without treatment in a simulated lagoon. Both aerobic and anaerobic treatment methods followed by storage effectively reduced the levels of total solids (59 to 68%), biological oxygen demand (85 to 90%), and sulfate (56 to 65%), as well as aerobic (83 to 95%), anaerobic (80 to 90%), and coliform (>99%) bacteria. However, only aerobic treatment reduced the levels of ammonia, and anaerobic treatment was more effective at reducing total sulfur and sulfate. The bacterial population structure of waste before and after treatment was monitored using 16S rRNA gene sequence libraries. Both treatments had unique effects on the bacterial population structure of waste. Aerobic treatment resulted in the greatest change in the type of bacteria present, with the levels of eight out of nine phyla being significantly altered. The most notable differences were the >16-fold increase in the phylum Proteobacteria and the approximately 8-fold decrease in the phylum Firmicutes. Anaerobic treatment resulted in fewer alterations, but significant decreases in the phyla Actinobacteria and Bacteroidetes, and increases in the phyla Planctomycetes, Spirochetes, and TM7 were observed.

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mentioning

confidence: 99%

Bacterial Population Dynamics in Dairy Waste during Aerobic and Anaerobic Treatment and Subsequent Storage

McGarvey

Miller

Zhang³

et al. 2007

Appl Environ Microbiol

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Section: Manure Treatment Technologiesmentioning

confidence: 99%

“…In general, thermophilic processes, particularly those operated in-vessel, are designed to expose all treated material to extreme lethal temperatures (60-65°C), while still maintaining sufficient metabolic activity by the nonpathogenic bacteria to sustain the process heat (Juteau et al, 2004). Thermophilic composting remains one of the most cost-effective treatment technologies for manure solids; it functions well in a variety of environments.…”

Section: Manure Treatment Technologiesmentioning

confidence: 99%

“…Some of the physico-chemical approaches to treatment include thermal conversion (combustion, gasification and pyrolysis), solid-liquid separation and filtration, advanced alkaline treatment, and aeration/ mixing. Some of the biological approaches to treatment include thermophilic composting (Rynk, 1992), vermicomposting, anaerobic digestion (Bicudo andGoyal, 2003), thermophilic digestion (Ahring et al, 2002;Aitken et al, 2007), autothermal thermophilic aerobic digestion (Layden et al, 2007), sequencing batch reactors (Juteau et al, 2004), and constructed wetlands (Cirelli et al, 2007;Humenik, 2001;Karim et al, 2008).In general, thermophilic processes, particularly those operated in-vessel, are designed to expose all treated material to extreme lethal temperatures (60-65°C), while still maintaining sufficient metabolic activity by the nonpathogenic bacteria to sustain the process heat (Juteau et al, 2004). Thermophilic composting remains one of the most cost-effective treatment technologies for manure solids; it functions well in a variety of environments.…”

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confidence: 99%

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Salmonella and Tomatoes

Bartz¹,

Marvasi²,

Teplitski³

2014

The Produce Contamination Problem

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Academic Press is an imprint of ElsevierNo part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the publisher Permissions may be sought directly from Elsevier's Science & Technology Rights Department in Oxford, UK: phone (+44) (0) 1865 843830; fax (+44) (0) 1865 853333; email: permissions@elsevier.com. Alternatively you can submit your request online by visiting the Elsevier web site at http://elsevier.com/locate/permissions, and selecting Obtaining permission to use Elsevier material NoticeNo responsibility is assumed by the publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein. Because of rapid advances in the medical sciences, in particular, independent verification of diagnoses and drug dosages should be made British Library Cataloguing in Publication DataA catalogue record for this book is available from the British Library Library of Congress Cataloging-in-Publication DataA catalog record for this book is available from the Library of Congress Printed and bound in the United States PART 3 CONTAMINATION AVOIDANCE PRE AND POSTHARVEST CHAPTER 15 Produce Contamination Issues in Mexico and CHAPTER 16 Regulatory Issues in Europe RegardingFresh PART 4 TECHNOLOGY FOR REDUCTION OF HUMAN PATHOGENS IN FRESH PRODUCE PrefaceThe premise of the book is that once human pathogen contamination of fresh produce occurs, it is extremely difficult to reduce pathogen levels sufficiently with currently available technologies based on washing with sanitizing agents to assure microbiological safety. Outbreaks since the first edition of this book was published have been attributed to consumption of fresh commodities including but not limited to cantaloupes, mangoes, tomatoes, seed sprouts, and salad greens. Globally extensive research, published in thousands of scientific papers and documents, has focused on the microbiological safety of fresh produce. Disinfection methods whether conventional or based on new innovative technology fail to reduce pathogen loads on produce to levels consistent with product safety.Produce decontamination methods are surprisingly similar in the level of reductions in pathogens they achieve. Methods that are effective, irradiation and high pressure, are either not accepted by a large segment of consumers or not practical for all types of fresh produce. The intrinsic interaction of microbes with plant tissues, internalization, biofilm formation, and association with inaccessible sites contributes to the insufficient reduction in microbial populations to assure product safety. The key to improving the microbial safety of fresh products is the development of wiser strategies to avoid human pathogen contamination of the products rather than focusing on disinfect...

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“…, however, be more fruitful to try to improve the Aerobic biological methods have been successfully used to treat livestock and poultry wastes (Kargi et al, 1980;Bicudoe et al, 1995;Carta, et al 1999;Tiquia et al, 2002;Juteau et al 2004;Mohaibes and HeinonTanski, 2004;Zhu et al, 2004;Zhang et al, 2006). The main functions of any aeration device are to: (a) supply a sufficient quantity of oxygen to the liquid medium to maintain aerobic conditions, (b) circulate the liquid to keep solids in suspension and avoid settling, (c) distribute the oxygenated liquid throughout the liquid body to avoid anaerobic zones and (d) keep good contact between the microbial cells, nutrients and dissolved oxygen to ensure efficient biodegradation of the organic matter (Carta et al, 1999;Fritsche and Hofrichter, 2008).…”

Section: Introductionmentioning

confidence: 99%

Factors Affecting the Oxygenation Capacity of Disc Aerators in an Oxidation Ditch System

Ghaly¹,

Edwards²

2011

American Journal of Environmental Sciences

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Problem statement:The use of aerobic biological methods for the treatment of livestock wastes has resulted in a proliferation of mechanical aeration devices to accomplish the desired treatment. The oxidation ditch system with disc aerators is among the aerobic systems that have been used to treat livestock waste. The main objectives of this study were to investigate the effects of various disc design parameters and system operational parameters on the oxygen transfer coefficient and to study the physical phenomenon of oxygen transfer using high speed movie techniques. Approach: A bench-scale oxidation ditch with a disc aerator was used to conduct a series of experiments to determine the effects of immersion depth (2.5-7.5 cm), disc speed (50-250 rpm), disc thickness (0.32-2.55 cm), hole diameter (0.00-1.92 cm) and number of rotating discs (1-2) on the oxygen transfer coefficient. The unsteady state method with sodium sulfite oxidation was used to deoxygenate the water and the dissolved oxygen concentration was measured with time. Results: The disc speed had the most significant effect on K L a with the immersion depth and hole diameter both showing strong effects and the disc thickness showing less effect. The effect of adding a second disc was comparable to using a single disc of double the thickness at lower speeds while at speeds higher than 200 rpm doubling the thickness of a single disc had less effect than a second disc. Conclusion:The highest oxygen transfer (1.526 min -1 ) was achieved using two coaxial discs with a disc speed of 250 rpm, a disc thickness of 0.64 cm, a hole diameter of 1.92 cm and an immersion depth of 7.5 cm. Bubble aeration and eddy aeration were the most prevalent mechanisms of oxygen transfer in the oxidation ditch while surface aeration played a relatively small role in oxygen transfer.

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Swine waste treatment by self-heating aerobic thermophilic bioreactors

Cited by 71 publications

References 18 publications

Bacterial Population Dynamics in Dairy Waste during Aerobic and Anaerobic Treatment and Subsequent Storage

Bacterial Population Dynamics in Dairy Waste during Aerobic and Anaerobic Treatment and Subsequent Storage

Salmonella and Tomatoes

Factors Affecting the Oxygenation Capacity of Disc Aerators in an Oxidation Ditch System

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