Microaerobic conditions in anaerobic sludge promote changes in bacterial composition favouring biodegradation of polymeric siloxanes

Abstract

Volatile organic silicon compounds (VOSiC) are harmful pollutants to the biota and ecological dynamics as well as biogas-based energy conversion systems. However, there is a lack of understanding regarding the...

Enhancing energy recovery of wastewater treatment plants through hydrothermal liquefaction

“…79 Thus, removal of aromatic compounds and a lower effluent COD concentration may be achieved when a two-stage anaerobic-aerobic reactor configuration is used, or when microaeration strategies are used during conventional AD. 80 The benefits of energy production and increased amine mineralization from this system look promising for the valorization and treatment of the aqueous product.…”

Recent development of biodegradable synthetic rubbers and bio-based rubbers using sustainable materials from biological sources

“…The degradation products of PDMS are usually environmentally friendly and PDMS is also non-toxic and biocompatible. 95 The degradation properties of acetoxy-cured PDMS in Mediterranean seawater had been investigated and reported recently while incorporating different natural llers, i.e., unmodied corn starch granules and micronized cocoa shell waste (CSW). 93,94 In both cases, the lled PDMS have higher biological oxygen demand (BOD) when immersed in Mediterranean seawater, and oxygen consumption increased with higher ller loading.…”

“…93,94 Although PDMS has excellent thermal stability and can be used for a wide range of operating temperatures, the rubber was found to be degradable in the soil environment through the hydrolysis of siloxane bonds. 95 The product of siloxane bond hydrolysis can then be further degraded by radicals and microbes into silica, carbon dioxide and water. The degradation products of PDMS are usually environmentally friendly and PDMS is also non-toxic and biocompatible.…”

“…The degradation products of PDMS are usually environmentally friendly and PDMS is also non-toxic and biocompatible. 95 …”

The Measurement, Application, and Effect of Oxygen in Microbial Fermentations: Focusing on Methane and Carboxylate Production

“…During microaeration, sulfide is oxidized to elemental sulfur by the action of sulfideoxidizing bacteria, thereby removing sulfide toxicity. Oxygen dosing has also been effective in the anaerobic degradation of recalcitrant or problematic wastewater contaminants, including, but not limited to, aromatic amines [21], aromatic hydrocarbons [22], anionic surfactants [23], antibiotics [24], and polymeric siloxanes [25].…”