Influence of support media on COD and BOD removal from domestic wastewater using biological treatment in batch mode

Salama, Youssef; Chennaoui, Mohammed; Mountadar, M.; Rihani, Mohammed; Assobhei, Omar

doi:10.1080/19443994.2014.883173

Cited by 7 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The outer layer, which consists of loosely bound EPS (LB-EPS), is a loose and dispersible slime layer without an obvious edge. The content of the LB-EPS in microbial aggregates is always less than that of the TB-EPS, and thus may have some influence on the characteristics of microbial aggregates [23,24].…”

Section: Definition Of Epsmentioning

confidence: 99%

Characterization, structure, and function of extracellular polymeric substances (EPS) of microbial biofilm in biological wastewater treatment systems: a review

Salama¹,

Chennaoui

Sylla

et al. 2016

Desalination and Water Treatment

124

View full text Add to dashboard Cite

2015): Characterization, structure, and function of extracellular polymeric substances (EPS) of microbial biofilm in biological wastewater treatment systems: a review, Desalination and Water TreatmentTo link to this article: http://dx. A B S T R A C TA review concerning the definition, extraction, characterization, production, and functions of extracellular polymeric substances (EPS) of microbial aggregates in biological wastewater treatment reactors is given in this paper. EPS are a complex high-molecular-weight mixture of polymers excreted by microorganisms, produced from cell lysis and adsorbed organic matter from wastewater. The EPS fill and form the space between the biofilm constituents, e.g. prokaryotic and eukaryotic microorganisms which inhabit the aggregates. It seems that the EPS matrix may serve as a multipurpose functional element of microbial communities, including adhesion, structure, protection, recognition, and physiology. Due to the metabolic activity of the cells, gradients develop and create different habitats within small distances, allowing a wide variety of organisms to settle and grow in the aggregate. As many of these organisms produce their specific EPS, it is not surprising that an extremely wide variety of microbial aggregates result. All of them have in common their highly hydrated extracellular matrix which is the place the organisms shape their very own microhabitat in which they live. However, as EPS are very complex, the knowledge regarding EPS is far from complete and much work is still required to fully understand their precise roles in the biological treatment process.

show abstract

Section: Definition Of Epsmentioning

confidence: 99%

Characterization, structure, and function of extracellular polymeric substances (EPS) of microbial biofilm in biological wastewater treatment systems: a review

Salama¹,

Chennaoui

Sylla

et al. 2016

Desalination and Water Treatment

124

View full text Add to dashboard Cite

show abstract

“…The basic structural unit in biofilm is micro-community encapsulated by extracellular matrix. The density of extracellular components close to the cells are intensive [ 24 , 25 ]. In addition to the extracellular adhesion components actively secreted by cells, the matrix components also include cell metabolism and lysis products, absorbed nutrients and their further decomposition products by enzymes [ 26 , 27 ].…”

Section: Structure and Heterogeneity Of Microbial Biofilmsmentioning

confidence: 99%

Regulatory network controls microbial biofilm development, with Candida albicans as a representative: from adhesion to dispersal

Huang

et al. 2022

Bioengineered

View full text Add to dashboard Cite

Microorganisms mainly exist in the form of biofilm in nature. Biofilm can contaminate food and drinking water system, as well as cause chronic wound infections, thereby posing a potential threat to public health safety. In the last two decades, researchers have made efforts to investigate the genetic contributors control different stages of biofilm development (adherence, initiation, maturation, and dispersal). As an opportunistic pathogen, C. albicans causes severe superficial or systemic infections with high morbidity and mortality under conditions of immune dysfunction. It has been reported that 80% of C. albicans infections are directly or indirectly associated with biofilm formation on host or abiotic surfaces including indwelling medical devices, resulting in high morbidity and mortality. Significantly, the outcome of C. albicans biofilm development includes enhanced invasion, exacerbated inflammatory responses and intrinsic resistance to antimicrobial chemotherapy. Thus, this review aimed at providing a comprehensive overview of the regulatory network controls microbial biofilm development, with C. albicans as a representative, served as reference for therapeutic targets.

show abstract

“…For instance, the ammonia compound is toxic to fish and other aquatic life and the microbial growth increases the biological oxygen demand and decreases dissolved oxygen concentrations within the aquatic environment. This creates "dead zones" caused by lack of dissolved oxygen in the water and is very detrimental to aquatic life (Salama et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Influence of Internal and External Recycle on Nitrogen Removal in Compact Bioreactor

Aminu¹,

Kutty²,

Isa³

et al. 2015

RJASET

View full text Add to dashboard Cite

Internal Recycle ratios (IR) were alternated and operated to determine its efficiency on nitrate removal within a SMALL FOOTPRINT bioreactor. Determining a suitable recycle ratio is essential to justify the prerequisites required for operative optimization. In order to achieve considerable nitrogen reduction, the reactor was designed with primary (pre) and secondary (post) anoxic chambers, combined aeration chamber for nitrification and carbon removal and final settler to settle the biomass prior to discharge. The nitrate oxidized in aeration chamber was recycled back to the pre-anoxic chamber. The residual nitrate flows to the post anoxic chamber for denitrification. Each IR ratio of 6, 4 and 0, was operated with distinct influent Chemical Oxygen Demand (COD) to Total Kjeldahl Nitrogen (TKN) ratios of 18.9, 14.9 and 10.9, respectively. The IR of 6 with COD/TKN ratio of 18.9 attained maximum Total Nitrogen (TN) removal efficiency of 90.7%. The overall average total nitrogen (TN) = 4.0 mg/L in effluent was achieved, signifying an average of 9.5% efficiency more than the process without nitrate recycle, with average effluent TN = 7.7 mg/L.

show abstract

Influence of support media on COD and BOD removal from domestic wastewater using biological treatment in batch mode

Cited by 7 publications

References 15 publications

Characterization, structure, and function of extracellular polymeric substances (EPS) of microbial biofilm in biological wastewater treatment systems: a review

Characterization, structure, and function of extracellular polymeric substances (EPS) of microbial biofilm in biological wastewater treatment systems: a review

Regulatory network controls microbial biofilm development, with Candida albicans as a representative: from adhesion to dispersal

Influence of Internal and External Recycle on Nitrogen Removal in Compact Bioreactor

Contact Info

Product

Resources

About