Swine manure post-treatment technologies for pathogenic organism inactivation

Bilotta, Patrícia; Kunz, Airton

doi:10.1590/s0100-69162013000200020

Cited by 16 publications

(11 citation statements)

References 32 publications

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“…Not only can A. baumannii survive anaerobic conditions and a competitive environment but also it tolerates high concentrations of heavy metals. The finding calls for bacteriological analysis and disinfection (alkaline, thermal, biological, chemical, or physical) 36 of liquid swine manure before it is applied as fertilizer in traditional extensive agriculture.…”

Section: Discussionmentioning

confidence: 99%

Carbapenem-Resistant Acinetobacter baumannii Recovered from Swine Manure

Hrenović

Musić

Durn

et al. 2019

Microbial Drug Resistance

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Recently, concerns have been raised about the possibility of Acinetobacter baumannii transmission between animals and humans. So far, A. baumannii has been reported in animals with which people can come into contact. The presence of this pathogen in animal manure presents an equally important public health risk. In this study, we report the finding of two A. baumannii isolates in swine manure from a Croatian pig farm. Both isolates shared features with the widespread human clinical isolates: affiliation to the international clonal lineage 2 (ST-195), carbapenem, and extensive drug resistance and the plasmid-located acquired bla OXA-23 gene. These two A. baumannii isolates survived anaerobic conditions, competition with other microorganisms, and elevated concentrations of heavy metals in the stagnant swine manure for at least 2 weeks. These findings call for bacteriological analysis and disinfection of liquid swine manure before its application as a fertilizer in traditional extensive agriculture.

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Section: Discussionmentioning

confidence: 99%

Carbapenem-Resistant Acinetobacter baumannii Recovered from Swine Manure

Hrenović

Musić

Durn

et al. 2019

Microbial Drug Resistance

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“…Its mode of action as an oxidizing agent relies on chemical processes that results in the destruction of cellular structures of pathogenic bacteria either completely or partially by raising the pH value above 12. At such given elevated pH, a broad spectrum of microbial activity is limited [ 97 ]. Bilotta and Kunz [ 97 ] emphasized the need of pretreatment of the waste to remove suspended solids, which may influence the efficiency of the disinfection process.…”

Section: The Methods Involved In the Control Of Pathogenic Microbementioning

confidence: 99%

An Overview of the Control of Bacterial Pathogens in Cattle Manure

Manyi-Loh

Mamphweli

Meyer

et al. 2016

IJERPH

207

106

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Cattle manure harbors microbial constituents that make it a potential source of pollution in the environment and infections in humans. Knowledge of, and microbial assessment of, manure is crucial in a bid to prevent public health and environmental hazards through the development of better management practices and policies that should govern manure handling. Physical, chemical and biological methods to reduce pathogen population in manure do exist, but are faced with challenges such as cost, odor pollution, green house gas emission, etc. Consequently, anaerobic digestion of animal manure is currently one of the most widely used treatment method that can help to salvage the above-mentioned adverse effects and in addition, produces biogas that can serve as an alternative/complementary source of energy. However, this method has to be monitored closely as it could be fraught with challenges during operation, caused by the inherent characteristics of the manure. In addition, to further reduce bacterial pathogens to a significant level, anaerobic digestion can be combined with other methods such as thermal, aerobic and physical methods. In this paper, we review the bacterial composition of cattle manure as well as methods engaged in the control of pathogenic microbes present in manure and recommendations that need to be respected and implemented in order to prevent microbial contamination of the environment, animals and humans.

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“…It is however an energy intensive process that could be economically feasible when waste thermal energy is available, such as in biogas production plants. UV irradiation can achieve high reduction of enteric bacterial and protozoan pathogens (2-5 log 10 ), however some viruses are relatively resistant to UV irradiation (Bilotta and Kunz, 2013;Sobsey et al, 2006). UV irradiation does not generate any unwanted residuals and does not alter the nutritional composition of WaW.…”

Section: Physical Methodsmentioning

confidence: 99%

Using agro-industrial wastes for the cultivation of microalgae and duckweeds: Contamination risks and biomass safety concerns

Μάρκου

Wang

et al. 2018

Biotechnology Advances

141

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Aquatic organisms, such as microalgae (Chlorella, Arthrospira (Spirulina), Tetrasselmis, Dunalliela etc.) and duckweed (Lemna spp., Wolffia spp. etc.) are a potential source for the production of protein-rich biomass and for numerous other high-value compounds (fatty acids, pigments, vitamins etc.). Their cultivation using agro-industrial wastes and wastewater (WaW) is of particular interest in the context of a circular economy, not only for recycling valuable nutrients but also for reducing the requirements for fresh water for the production of biomass. Recovery and recycling of nutrients is an unavoidable long-term approach for securing future food and feed production. Agro-industrial WaW are rich in nutrients and have been widely considered as a potential nutrient source for the cultivation of microalgae/duckweed. However, they commonly contain various hazardous contaminants, which could potentially taint the produced biomass, raising various concerns about the safety of their consumption. Herein, an overview of the most important contaminants, including heavy metals and metalloids, pathogens (bacteria, viruses, parasites etc.), and xenobiotics (hormones, antibiotics, parasiticides etc.) is given. It is concluded that pretreatment and processing of WaW is a requisite step for the removal of several contaminants. Among the various technologies, anaerobic digestion (AD) is widely used in practice and offers a technologically mature approach for WaW treatment. During AD, various organic and biological contaminants are significantly removed. Further removal of contaminants could be achieved by post-treatment and processing of digestates (solid/liquid separation, dilution etc.) to further decrease the concentration of contaminants. Moreover, during cultivation an additional removal may occur through various mechanisms, such as precipitation, degradation, and biotransformation. Since many jurisdictions regulate the presence of various contaminants in feed or food setting strict safety monitoring processes, it would be of particular interest to initiate a multi-disciplinary discussion whether agro-industrial WaW ought to be used to cultivate microalgae/duckweed for feed or food production and identify most feasible options for doing this safely. Based on the current body of knowledge it is estimated that AD and post-treatment of WaW can lower significantly the risks associated with heavy metals and pathogens, but it is yet unclear to what extent this is the case for certain persistent xenobiotics.

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Swine manure post-treatment technologies for pathogenic organism inactivation

Cited by 16 publications

References 32 publications

Carbapenem-Resistant Acinetobacter baumannii Recovered from Swine Manure

Carbapenem-Resistant Acinetobacter baumannii Recovered from Swine Manure

An Overview of the Control of Bacterial Pathogens in Cattle Manure

Using agro-industrial wastes for the cultivation of microalgae and duckweeds: Contamination risks and biomass safety concerns

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