Full-scale aerobic granular sludge for municipal wastewater treatment – granule formation, microbial succession, and process performance

Abstract

Aerobic granular sludge (AGS) plants have gained growing interest and application due to their low energy demand, small footprint, and low operational costs. However, the fulfilment of strict discharge limits...

Aerobic Granular Sludge: Perspectives for Excess Sludge Management and Resource Recovery

“…In the same subject, Sarma et al [21] underlined that there is a shortage of understanding of the precise factors that directly correlate with granules' size distribution and their microbial compositions. Ekholm et al [22] stated that the assembling mechanism of granules microbial communities is still undefined. Ekholm et al [22] and Hamiruddin et al [23] observed that the composition of microbial cultures is influenced by seasonal variations and wastewater characteristics.…”

“…Ekholm et al [22] stated that the assembling mechanism of granules microbial communities is still undefined. Ekholm et al [22] and Hamiruddin et al [23] observed that the composition of microbial cultures is influenced by seasonal variations and wastewater characteristics. In terms of operation mode, no clear observations reflect significant differences in the microbial clusters of cultivated granules from both SBR and CFR units [23,6].…”

Case study of aerobic granular sludge and activated sludge—Energy usage, footprint, and nutrient removal

“…The AGS system comprised sequencing batch reactors whereas the CAS system was based on tanks in series with continuous flow. The case study was performed at the Österröd WWTP (Sweden), characterized by large fluctuations in nutrient loads and temperature (Ekholm et al, 2022). Effluent quality, land footprint, energy usage, and sludge production were compared for the two techniques.…”

“…Biological nitrogen and phosphorus removal rely on the availability of organic substrates (Henze et al, 2019). The Dutch AGS plant had relatively high concentrations of organic matter in the influent (average concentrations of chemical oxygen demand [COD] 506 mg L −1 , biological oxygen demand [BOD] of 224 BOD 5 mg L −1 , and BOD/N‐ratio of 4.5), compared to the full‐scale AGS plant in Sweden (average concentrations of COD 277 mg L −1 , BOD 7 110 mg L −1 and BOD/N‐ratio of 3.2; Ekholm et al, 2022), which influences the process performance.…”

Evaluating the overall performance of immobilized particles through different crosslinking strategies and their nitrification characteristics

“…4 The immobilized microorganism technology and aerobic granulation technology could improve the sludge holding capacity of the reactor and cultivate the functional bacteria very quickly. 5,6 Moreover, it is powerful in enhancing the adaptability of sensitive bacteria to adverse environments by the protection of immobilized materials. 7 In recent years, the immobilized microorganism technology is a research hotspot in the treatment of biological sewage.…”