2023/12/8/ · In this study, an algal–bacterial symbiotic consortium was integrated with the sediment microbial fuel cell (SMFC) to construct an algal–bacterial cathode SMFC (AC-SMFC) for excess sewage sludge treatment and electricity generation. A bacterial cathode SMFC (BC-SMFC) and a static settling system (SS-system) were used as controls.
2024/3/20/ · In common aerobic wastewater treatment such as the activated sludge process, the organic component of the wastewater is converted to biosolids or sludge. The commonly used disposal for sewage sludge are agricultural spreading, landfills, composting, anaerobic digestion, recycling as a construction material,
2020/5/8/ · Anaerobic digestion (AD) is the most extensively employed sludge stabilisation process. AD stabilises the sludge biologically in the absence of air. In doing so, it reduces the amount of volatile solids by their conversion to a biogas (methane CH 4, carbon dioxide CO 2 and water H 2 O). The biogas then demands further processing for
2023/12/1/ · 1. Introduction. Aerobic Granular Sludge (AGS) technology is a biological wastewater treatment technique that offers significant advantages over conventional activated sludge systems, including a smaller footprint and improved energy efficiency (Bengtsson et al., 2018; de Bruin et al., 2004; de Kreuk et al., 2005).To ensure the
2022/1/1/ · Figure 2 depicts a simplified schematic representation of the major processes of sewage treatment. Prescreening to remove grit, plastic, and other debris; primary sedimentation of settleable solids; and secondary aerobic biological treatment of settled sewage, or primary effluent, utilizing aerated reactors (activated sludge process)
This paper investigates primary sludge pre-fermentation at different temperatures (20, 37, 55, and 70°C), treatment times (12, 24, 48, and 72h), and oxygen availability (semi-aerobic, anaerobic); and its impact on anaerobic digestion. Pre-fermentation at 20 and 37°C succeeded for VFA production with acetate and propionate being major products.
2023/5/13/ · Fermentation 2023, 9, 471 3 of 16 process was tested and certified during a 10-month trial in a semi-technical 1 m3 prototype of the PEGABB reactor (verified TÜV-Süd Industrie Service GmbH). The sewage sludge digester of the respective reference plant yielded 67% more biogas and 36% less digestate.
2023/12/1/ · Ultrasonication allows sludge reduction to be performed in situ during wastewater treatment, and the reflux point of the lysed sludge affects this performance. This study investigated the effects of reflux point (anaerobic stage, carbon/nitrogen (C/N) lowest stage, and aerobic stage) on sludge lysis-cryptic growth in an anaerobic/aerobic
2023/12/15/ · Compared with conventional aerobic fermentation (CAF), there is limited knowledge of how hyperthermophilic aerobic fermentation (HAF) enhances the
This study aims to introduce a novel continuous self-circulating up-flow fluidized bed process to treat actual municipal sewage (Fig. 1 (a)).The process is comprised of two or more tanks connected by pipes that initiate from the top of the preceding reactor and terminate at the bottom of the subsequent reactor; the final reactor is also connected to the first reactor.
A continuous-flow anaerobic/aerobic/anoxic reactor with complete suspended activated sludge using sludge alkaline fermentation products as carbon source was utilized to strengthen nitrogen removal performance for low C/N ratio (<4) wastewater. Long-time performance indicated that the nitrite accu
2023/10/1/ · Aerobic granular sludge (AGS) has different physicochemical properties and microbial communities compared to conventional activated sludge (CAS), which may result in different behaviors during anaerobic fermentation and require further investigation. This study investigated the effect of granule siz
Sewage sludge treatment describes the processes used to manage and dispose of sewage sludge produced during sewage treatment. Sludge treatment is focused on reducing sludge weight and volume to reduce transportation and disposal costs, and on reducing potential health risks of disposal options. Composting is an aerobic process
2011/3/15/ · It was found that by the use of waste-activated sludge alkaline fermentation liquid as the synthetic wastewater-carbon source, compared with the commonly used carbon source in the literature (e.g., acetic acid), the generation of N(2)O and NO was reduced by 68.7% and 50.0%, respectively, but the removal efficiencies of
2024/2/29/ · Special Issue Information. Dear Colleagues, Wastewater treatment facilities in China must produce a significant amount of sewage sludge due to the country's rapid urbanization and the rise in urban wastewater. This sludge contains potential resources including organic materials, nutrients, metals, and bioenergy that can be …