Structural Characteristics of Aerobic Granular Sludge and Factors That Influence Its Stability: A Mini Review

Abstract

Current extensive research on aerobic granular sludge (AGS) largely focuses on improving its microbial biodiversity, settlement behavior, nitrogen and phosphorus removal efficiency, and shock load resistance. Great challenges that have to be faced are the bottleneck of slow-speed granulation and easy disintegration after granulation, which are key to the extended application of AGS technology. In the present review, the typical morphological structures of AGS are firstly summarized as well as the granulation model hypotheses, and then, we analyze the dominant microflora and their spatial distribution features. The influencing factors on particle structure stability are discussed thereafter on a macro and micro scale. Prospects and future research trends are also discussed based on the current study results for AGS technology.

Editorial

“…pressões de seleção utilizadas para reter os agregados microbianos com boa capacidade de sedimentação e remover o excesso de flocos do biorreator (HOU et al, 2021).…”

Microbial Ecology of Granular Biofilm Technologies for Wastewater Treatment: A Review

“…In addition, EPS plays an important role in P removal because poly-P is also accumulated in EPS bound to cells [ 17 ]. Another mechanism for P removal is the precipitation with Ca or Mg [ 23 , 34 , 65 ]. PAOs and GAOs are considered slow-growing microorganisms, and they can be found in the outer and inner layers of dense granules with anoxic microenvironments [ 17 , 22 , 34 ].…”

Optimization of Calcination Temperature to Synthesis ZnO Nanostructures as Photocatalyst Using Pineapple as Chelating Agent

“…There are many methods used to overcome the textile waste problem. For example, using active mud [4][5][6] or anaerobic with bioremediation processes [7][8][9], the most common method is photodegradation, utilizing photocatalyst [10][11][12]. Nanostructures used for photocatalyst are ZnO.…”