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ENVIRONMENTAL RESEARCH
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Summary: This study proposes an environmentally friendly strategy using zero valent iron (ZVI) activating sulfite pretreatment to enhance short chain fatty acids (SCFAs) production from anaerobic fermentation of sewage sludge. The results showed that ZVI-sulfite pretreatment significantly increased SCFAs production and acetate proportion. Mechanism analysis revealed that ZVI-sulfite pretreatment accelerated sludge-floc disintegration and provided more easily- and bio-available substances for functional anaerobes. The pretreatment also enriched functional anaerobes related to hydrolysis, acidogenesis, and acetogenesis, and boosted the functional genes abundance involved in butyrate and acetate formation pathways.
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CHEMICAL ENGINEERING JOURNAL
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Qian Ping et al.
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BIORESOURCE TECHNOLOGY
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Antonio Ricardo Mendes Barros et al.
Summary: The addition of calcium had a significant effect on granulation, particularly in conventional SBRs where larger granules formed in a shorter period of time due to higher EPS production. While the removal of carbon, nitrogen, and phosphorus was not affected, the addition of calcium influenced granulation time, settleability characteristics, size, and granule composition.
ENVIRONMENTAL RESEARCH
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Summary: Microalgae have potential for bioenergy production and wastewater treatment, but challenges remain, including the need for systematic studies on maintaining stable and effective operation of Microalgal-Bacterial Consortia (MABC). Additional research is needed to address the interactions between algae and bacteria in wastewater and optimize the use of MABC for high-value bioproduct generation.
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