A critical review on anaerobic digestion of microalgae and macroalgae and co-digestion of biomass for enhanced methane generation

Eighteen elements (Al, As, Ba, Ca, Cd, Co, Cr, Cu, K, Li, Mg, Mn, Na, Ni, Pb, Sb, Sr and Zn) were determined in water taken from Malta Lake. All the analyses were made using the inductively coupled plasma mass spectrometry method (ICP-MS). In our investigations we focused on the variability of the element content in water from a number of sampling stations and over different seasons. The obtained results were submitted to statistical analysis. First, the results were interpreted using the analysis of variance test (ANOVA). This has revealed differences in concentration for the majority of elements with regard to seasons. Then, cluster analysis (CA) and factor analysis (FA) were applied to explore similarities between sampling stations. Neither of these have demonstrated any grouping. Finally, factor analysis and principal component analysis (PCA), applied to show the grouping of elements, revealed how different sampling stations are related to each other.

Effect of pesticides on soil microbial community.

Anaerobic decomposition of organic compounds is conducted in close cooperation of specialized bacteria of different types, including mostly hydrolyzing, digestive, acetogenic, homoacetogenic, sulfate-reducing (VI) and methanogenic bacteria. A great interest in the anaerobic digestion process results mainly from its advantages, as compared to aerobic methods. The main advantages of the methane digestion process are: Production of an insignificant amount of biomass and lower energy input, as compared to degradation conducted under aerobic conditions. This paper reviews the transformations, stages and microorganisms that participate in methane fermentation process. Key words: Biogas, methane fermentation, methanogens, microorganisms, anaerobic digestion.

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Methane fermentation process as anaerobic digestion of biomass: Transformations, stages and microorganisms

Performance and microbial community analysis of two-stage process with extreme thermophilic hydrogen and thermophilic methane production from hydrolysate in UASB reactors.

Development of microbial community structure and actvity in a high-rate anaerobic bioreactor at 18 °C

PCR-based DGGE fingerprinting and identification of methanogens detected in three different types of UASB granules ☆

During food-borne disease outbreaks, people get most of their information about food safety and risk from the news media. Best practice in risk messaging requires the rapid sharing of information to minimise harm, while expressing empathy, accountability, and commitment. The journalistic processes through which news is shaped can prioritise information differently, potentially limiting informed decision-making. The South African listeriosis outbreak (2017–2018) was the biggest in global history and generated considerable media attention. Using ‘social attenuation of risk theory’ and ‘gatekeeping theory’, combined with ‘crisis and emergency risk communication best practices’ as guiding principles, in this study we aimed to analyse which components of risk message content and which news factors were prioritised by news media during the outbreak. Content analysis of 91 listeriosis-related newspaper articles revealed that the most common risk messaging practices included were information about ‘what is known’ and ‘which foods to avoid’. News factor analysis indicated ‘relevance’ was omnipresent, and ‘controversy’ was the second most frequently encountered factor. Overall, our findings suggest that only some best practices featured in the risk message media content, while others were mostly absent. This should be considered when developing future risk communication strategies related to food safety.

C. Lamprecht

Papers

PCR-based DGGE fingerprinting and identification of methanogens detected in three different types of UASB granules ☆

‘Polony panic’: News values and risk messages in news coverage of the South African listeriosis outbreak of 2017–2018