Microbial community structures in conventional activated sludge system and membrane bioreactor (MBR)

Baek, Song Ee; Pagilla, Krishna

doi:10.1007/s12257-008-0303-1

Cited by 16 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, compared to conventional activated sludge, an MBR is typically operated at high MLSS concentrations, long sludge retention time, and high DO concentrations to control membrane fouling. Previous studies showed that different treatment processes could harbor distinct microbial community structures (37)(38)(39)(40). However, our study revealed that treatment process was not significantly correlated with most of the functional and phylogenetic groups except for the functional groups involved in C and N cycling and organic remediation.…”

Section: Discussioncontrasting

confidence: 71%

Distance-Decay Relationship for Biological Wastewater Treatment Plants

Wang

Wen

Deng

et al. 2016

Appl Environ Microbiol

View full text Add to dashboard Cite

Patterns in the spatial distribution of organisms provide important information about mechanisms underlying biodiversity and the complexity of ecosystems. One of the most well-documented spatial patterns is the distance-decay relationship, which is a universal biogeographic pattern observed repeatedly for plant and animal communities, particularly for microorganisms in natural ecosystems such as soil, ocean, and salt marsh sediment. However, it is uncertain whether the microorganisms exhibit a distance-decay pattern in engineered ecosystems. Therefore, we measured the distance-decay relationship across various microbial functional and phylogenetic groups in 26 biological wastewater treatment plants (WWTPs) in China using a functional gene array (GeoChip 4.2). We found that microbial communities of activated sludge in WWTPs exhibited a significant but very weak distance-decay relationship. The taxon-area z values for different functional and phylogenetic groups were <0.0065, which is about 1 to 2 orders of magnitude lower than those observed in microbial communities elsewhere. Variation-partitioning analysis (VPA) showed that the relationships were driven by both environmental heterogeneity and geographic distance. Collectively, these results provided new insights into the spatial scaling of microbial communities in engineering ecosystems and highlighted the importance of environmental heterogeneity and geographic distance in shaping biogeographic patterns. IMPORTANCEDetermining the distance-decay relationship of microbial biodiversity is important but challenging in microbial ecology. All studies to date are based on natural environments; thus, it remains unclear whether there is such a relationship in an engineered ecosystem. The present study shows that there is a very weak distance-decay relationship in an engineered ecosystem (WWTPs) at the regional-to-continental scale. This study makes fundamental contributions to a mechanistic, predictive understanding of microbial biogeography.A central goal of ecology is to understand how biodiversity is generated and maintained (1). Spatial patterns of species diversity offer insights into the mechanisms shaping biodiversity and are of practical importance for predicting the risk of biodiversity loss by environmental changes and consequently for setting up conservation priorities (2). Therefore, the spatial distribution patterns of species diversity have solicited substantial attention. Traditionally, the field of spatial distribution patterns of biodiversity has focused on plants and animals. For example, it has been well documented for plant and animal communities that community similarity decreased with geographic distance, known as the distance-decay relationship (3, 4). In recent years, a number of studies have been conducted to investigate biogeographic patterns of microorganisms, including bacteria, archaea, fungi, and other microbial eukaryotes (3,(5)(6)(7)(8)(9)(10). A growing body of research has shown that microorganisms, like plants and animals, exh...

show abstract

Section: Discussioncontrasting

confidence: 71%

Distance-Decay Relationship for Biological Wastewater Treatment Plants

Wang

Wen

Deng

et al. 2016

Appl Environ Microbiol

View full text Add to dashboard Cite

show abstract

“…Nitrogen and phosphorous recovery rate have improved on the introduction of biofilm to the conventional activated sludge membrane. Proteobacteria, Nitrosomonas,and Nitrobacter are commonly used microbes in MBR (Baek and Pagilla 2009).…”

Section: Membrane Biofilm Reactor (Mbr)mentioning

confidence: 99%

Microbial Aspect in Wastewater Management: Biofilm

Sharma

2021

Advanced Industrial Wastewater Treatment and Reclamation of Water

View full text Add to dashboard Cite

Water, a universal solvent, is a significant component of biotic and abiotic factors. The increasing population is creating the advancement of industries and agriculture. But this advancement is also affecting the environment. Each sector needs to dispose of its waste product, and most of these are polluting surface and groundwater. The discharge includes hazardous pollutants, including heavy metals, radioactive elements, organic as well inorganic waste. This pollutant also causes eutrophication, inviting the growth of algae and bacteria in surface water, increasing the oxygen demand, and disturbing its physical and chemical properties. Water is also a natural habitat of many organisms and even supports life in the lithospherewater pollution affects both animal and plant kingdom. Extra care is needed while purification of water by various chemical and physical methods.Further, the chemicals may affect the microenvironment. Biodegradation can overcome the problem of pollution by chemicals. It is convenient as well as safer to use. Bioaugmentation is popularly used for decades to enhance the degradation procedure. The microbes metabolize the pollutant into a less toxic product. This chapter deals with these microbes and their mechanism involved in treating wastewater.

show abstract

“…Indeed, in MBR system, the selection of bacteria is strictly based on metabolic or kinetic factors rather than the ability of bacteria to aggregate in dense and settling flocs. From this point of view, MBR are characterized by a greater variety of the microbial community compared to a CAS system [17], thus resulting in a better enrichment of the accumulating biomass. Based on the above considerations, the selective enrichment of MMC in MBR system remain a promising solution to improve the overall production of biopolymers, although the operating conditions should be optimized to maximize the production yield.…”

Section: Production Of Biopolymers Using Fermented Real Citrus Wastewater: Effect Of C/nmentioning

confidence: 99%