Biomass and microbial activity in a biofilter during backwashing

Bai, Yu; Zhang, Jie; Li, Yifan; Gao, Yunan; Yong, Li

doi:10.1631/jzus.2005.b0427

Cited by 8 publications

(6 citation statements)

References 16 publications

(14 reference statements)

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“…For maintaince of water quality RAS have been utilized for solid removal and biological filtration. For this purpose, there are two or more components before the water returns to aquaculture pond [ 21 ]. In aquaponics, both solids removal and biological filtration are in the same component.…”

Section: Introductionmentioning

confidence: 99%

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Perspective for Aquaponic Systems: “Omic” Technologies for Microbial Community Analysis

Munguía-Fragozo

Alatorre-Jácome

Rico-García

et al. 2015

BioMed Research International

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Aquaponics is the combined production of aquaculture and hydroponics, connected by a water recirculation system. In this productive system, the microbial community is responsible for carrying out the nutrient dynamics between the components. The nutrimental transformations mainly consist in the transformation of chemical species from toxic compounds into available nutrients. In this particular field, the microbial research, the “Omic” technologies will allow a broader scope of studies about a current microbial profile inside aquaponics community, even in those species that currently are unculturable. This approach can also be useful to understand complex interactions of living components in the system. Until now, the analog studies were made to set up the microbial characterization on recirculation aquaculture systems (RAS). However, microbial community composition of aquaponics is still unknown. “Omic” technologies like metagenomic can help to reveal taxonomic diversity. The perspectives are also to begin the first attempts to sketch the functional diversity inside aquaponic systems and its ecological relationships. The knowledge of the emergent properties inside the microbial community, as well as the understanding of the biosynthesis pathways, can derive in future biotechnological applications. Thus, the aim of this review is to show potential applications of current “Omic” tools to characterize the microbial community in aquaponic systems.

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Section: Introductionmentioning

confidence: 99%

“…The pH is a parameter that can limit the development for plants, fish, or bacteria [ 14 , 23 ]. Populations of microorganisms or microbial community in biofilter of aquaponics have an essential role in aquaponic systems development [ 21 ]. Biofiltration takes advantage of bacterial metabolic process.…”

Section: Introductionmentioning

confidence: 99%

Perspective for Aquaponic Systems: “Omic” Technologies for Microbial Community Analysis

Munguía-Fragozo

Alatorre-Jácome

Rico-García

et al. 2015

BioMed Research International

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“…The abrasive power of the backwash exerts a ripping or shearing type of force on the biofilm (Bai et al, 2004). When a backwash occurs water at a high pressure is released from the bottom of the filter column and rushes upwards getting beneath the biofilm's weakest layers and detaching the loosely associated parts.…”

Section: Clsm and Image Quantification Of Biofilm Parametersmentioning

confidence: 99%

Assessing biofilm on biofilter media (granular activated carbon and anthracite) from a pilot scale drinking water treatment plant

Dimas¹

2021

Preprint

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Drinking Water Treatment Plants employ biofiltration systems to increase water quality through nutrient reduction. Microbial biofilms housed in biofilter media, are responsible for nutrient uptake and biodegradation. The purpose of this study was to re-evaluate the function and efficiency of biofilter media and investigate seasonal changes in the microbial populations. TOC and DO were more reduced in Granular Activated Carbon (GAC) media than in anthracite. Heterotrophic plate counts (HPC) were conducted to establish seasonal trends on microbial population. PCR-amplified 16S rRNA fragments were sequenced to compare microbial communities. Summer samples have higher HPC than winter samples. Summer samples yielded a reduction in microbial diversity and no detectable overlap with winter samples. Confocal microscopy conducted to qualitatively visualize the structure of biofilms was complemented by quantitative COMSTAT analysis showing GAC with double the biomass due to a greater level of attachment sites. GAC outcompetes anthracite in chemical adsorption and biological activity.

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“…Biofiltration using GAC as a filter medium is also referred to as biologically enhanced activated carbon (BAC) process, which is known to remove contaminants more effectively than other traditional filter media (Arnold et al, 2018; Terry & Summers, 2018). The performance of biofilter depends on the biofilms growing on filter media and their contaminant removal ability (Bai et al, 2005; Cohen, 2001), both of which rely on many factors including filter types and ages, operation time, empty bed contact time (EBCT), nutrient and oxygen levels, and even water quality (Abu Hasan et al, 2020; Cuthbertson et al, 2020; Du et al, 2020; Lu, Sun, et al, 2020; Ross et al, 2019; Zearley & Summers, 2012; Zhao et al, 2019). This leads to different biofilm formations and physiologies, resulting in highly distinctive mechanisms for water treatment.…”

Section: Introductionmentioning

confidence: 99%

Biofiltration for treatment of recent emerging contaminants in water: Current and future perspectives

Thuptimdang

Siripattanakul‐Ratpukdi

Ratpukdi

et al. 2020

Water Environment Research

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This review article discusses the current state of knowledge on water treatment and reuse by biofiltration systems focusing on biologically enhanced activated carbon (BAC) process. First, the applications of BAC in water treatment systems are overviewed, and then, the mechanisms for both biofilm formation and contaminant treatment are discussed along with the operational parameters influencing the performance of BAC process. Since contaminant removal by BAC is governed by adsorption and biodegradation, both processes are reviewed in relation to the treatment mechanisms. Information on removal of recent emerging contaminants including nitrogenous and unregulated disinfection by-products (DBPs) and their precursors, poly-and perfluorofluoroalkyl substances, nanoparticles, and plasticizers and microplastics by BAC is given along with suggestions for treatment improvements and future research. The uniqueness of this review includes insights on relevant biofilm aspects and the coverage on the abilities of BAC for treatment of recent and less common emerging contaminants especially unregulated DBPs and their precursors, nanoparticles, and plasticizers and microplastics. For future BAC studies, recommendations are proposed on exploring the biofilm development on media and recent emerging contaminants as co-contaminants, as well as developing novel supporting materials such as biochar. © 2020 Water Environment Federation • Practitioner points• The amount and the physiology and physical structure of biofilm affect the treatment efficiency of biological activated carbon. • Biological activated carbon is capable of removing a majority of nitrogenous and unregulated disinfection by-products. • Whether and how biological activated carbon is impacted by and/or can remove nanoparticles, and plasticizers and microplastics remain largely unknown. • Future work on biological activated carbon should focus on biofilm evolution and control, and novel support materials.

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Biomass and microbial activity in a biofilter during backwashing

Cited by 8 publications

References 16 publications

Perspective for Aquaponic Systems: “Omic” Technologies for Microbial Community Analysis

Perspective for Aquaponic Systems: “Omic” Technologies for Microbial Community Analysis

Assessing biofilm on biofilter media (granular activated carbon and anthracite) from a pilot scale drinking water treatment plant

Biofiltration for treatment of recent emerging contaminants in water: Current and future perspectives

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