biomass processing Articles
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Biosorption of Ag+ from aqueous solution by Streptomyces rimosus biomass
The silver biosorption capacity of a Streptomyces rimosus biomass pretreated with NaOH was studied in the batch mode. Under optimal experimental conditions, a biosorption capacity of 63 mg Ag+ g−1 biomass was obtained. External mass transfer was found to be the controlling step in the overall sorption process. The equilibrium data poorly fitted the Langmuir and Freundlich model isotherms over the ...
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Ammonium removal in landfill leachate using SBR technology: dispersed versus attached biomass
Large concentrations and oscillations of ammonium nitrogen (NH4+-N) in municipal landfill leachate pose considerable constraints to its further treatment in central wastewater treatment plants. The aim of this study was to evaluate and optimize two technologies for the pre-treatment of 600 L/day of landfill leachate: in particular, to optimize their operational conditions for NH4+-N removal ...
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Different process configurations for biomass-carrier-based treatment of industrial wastewater
KeywordsBiological wastewater treatment, Industrial wastewater, biomass carriers, case study IntroductionBiological treatment is still the most cost effective method to oxidize organic pollutants in wastewater. However, industrial wastewaters from different sources vary widely in composition. In some cases, the wastewater composition might prevent biological treatment by itself to meet effluent ...
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Quantification of kinetic parameters for heterotrophic bacteria via respirometry in a hybrid reactor
Over the last decade new technologies are emerging even more for wastewater treatment. Among the new technologies, a recent possible solution regards Moving Bed Biofilm Reactors (MBBRs) that represent an effective alternative to conventional processes. More specifically such systems consist in the introduction of plastic elements inside the aerobic reactor as carrier material for the growth of ...
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The role of colloidal and particulate organic compounds in denitrification and EBPR occurring in a full-scale activated sludge system
The efficiencies of denitrification and enhanced biological phosphorus removal (EBPR) in biological nutrient removal (BNR) activated sludge systems are strongly dependent on the availability of appropriate carbon sources. Due to high costs of commercial compounds (such as methanol, ethanol, acetic acid etc.) and acclimation periods (usually) required, the effective use of internal carbon sources ...
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Fixed biomass process and its resistance to elevated copper loads during carbon removal and nitrification of industrial wastewater
Metal compounds such as copper are known to be inhibitory or toxic to biological activity within wastewater treatments when reaching a certain threshold concentration. Little information on threshold values can be found for biofilm process like Biological Aerated Filters (BAFs). In this study, a BAF pilot plant (Biostyr®) for carbon removal and nitrification was operated to study its response to ...
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Black box description of anaerobic growth on acetic acid.
For environmental applications, the chemotrophic microbial growth systems are of mayor importance. One of the key parameters in such processes is the yield of biomass on the electron donor substrate. In practice, an estimate of the expected biomass yield in a process is frequently required, but considering the wide variety of microbial population, this poses a difficult problem. Analysis of ...
By ORBIT e.V.
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Metal ions biosorption from dilute aqueous solution
Biosorption, using non-living biomass (mostly suspended), is briefly reviewed in this paper as applied to toxic metal ions removal, with particular focus on the kinetics and engineering considerations of the process. Several diverse kinetic models were successful in fitting the experimental data. Evidence was provided that the metal biosorption (on Aeromonas caviae biomass) is a complex process. ...
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What Is a Trommel Screen Used for?
Exploring the Versatile Uses of Trommel Screens A Trommel screen also known as a Rotary Trommel Screen is a versatile piece of equipment that is used for a variety of applications across different industries. Its primary purpose is to separate and classify materials based on their size. The design of a trommel screen consists of a cylindrical drum with a rotating screen surface that has holes ...
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Application Focus: Biological Wastewater Treatment
In knowing the size and health of the active biomass population in a wastewater treatment process, cause-and-effect relationships can then be established with process variables. If a change in the process is beneficial or detrimental to the population, ATP results will indicate to what degree the population is helped or harmed by the change. Since ATP measurements isolate the living population, ...
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Hexavalent chromium removal from municipal wastewater using ferrous salts
Hexavalent chromium is difficult to remove during conventional biological wastewater treatment. This is because the hexavalent form is dissolved and is only sparingly removed by adsorption onto biomass in conventional processes. Hexavalent chromium is of particular concern because of its aquatic toxicity, and an increasing number of wastewater works have effluent discharge limits to protect ...
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Mathematical models for biomass in membrane-BNR process for wastewater treatment
The equation of biomass is related to the mass-balance equation of substrate. This equation of substrate is expressed according to a model using the Monod equation, which indicates some limits for calculating the amounts of VSS in the MBR process. Some degradation of biomass which is caused by long SRT might result in the generation of substrate based on COD. Research was conducted by lab-scale ...
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Energy, cost and design aspects of coarse- and fine-bubble aeration systems in the MBBR IFAS process
With the MBBR IFAS (moving bed biofilm reactor integrated fixed-film activated sludge) process, the biomass required for biological wastewater treatment is either suspended or fixed on free-moving plastic carriers in the reactor. Coarse- or fine-bubble aeration systems are used in the MBBR IFAS process. In this study, the oxygen transfer efficiency (OTE) of a coarse-bubble aeration system was ...
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Activated sludge optimization using ATP in pulp and paper industry
The activated sludge process is an old technology, but still the most commonly used one for treatment of wastewater. Despite the wide spread usage the technology still suffers from instability (Tandoi et al. 2006) and high operating cost. Activated sludge processes often carry a large solids inventory. Managing the total inventory without interference is the key component of the optimization ...
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Recycle/Reuse Based Effluent Treatment Plant - Textile Mills - Pakistan
Setting trends in water resource management for Textile Waste Water Treatment with MBR Technology W.O.G Group became the trend-setter in water resource management through 5.5 MLD recycle/reuse based effluent treatment plant. PREVIOUS TREATMENT METRICS: Effluent treatment capacity: 2500 m3/day Treated effluent quality: As per local discharge standards Existing Treatment Scheme: ...
By WOG Group
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Pesticide removal through wastewater and advanced treatment: full-scale sampling and bench-scale testing
Dieldrin and DDx removal through wastewater treatment, ozonation, and microfiltration was assessed for a water reuse project for groundwater replenishment in Monterey, California, USA. Full-scale sampling was conducted at the wastewater treatment plant, and physical wastewater treatment processes, ozonation, and microfiltration were tested at the bench scale. Removals observed through ...
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Design configurations for commercial application of biomass carriers in small wastewater treatment plants
Introduction Moving bed type reactors are bio-film processes utilizing small, plastic biomass carriers that mix in the water. The use of biomass carriers is becoming common world-wide, for many applications, some of which are: compact low operation units, industrial wastewater roughing filters, retrofit and upgrade of municipal wastewater treatment plants. The AGARTM Process (Attached Growth ...
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Modeling and verification of selective sludge discharge as the controlling factor for aerobic granulation
Mathematical simulation and laboratory experiments were conducted to investigate the controlling factor for aerobic sludge granulation. A model was used to describe the biomass dynamics during the granulation process. The simulation results indicate that the selective discharge of small and loose sludge flocs is the key controlling factor for granulation. In the experimental studies, tests were ...
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Complete solids retention activated sludge process
In a slaughterhouse's full-scale extended aeration activated sludge wastewater treatment plant (WWTP), operating under complete solids retention time, the evolution of mixed liquor suspended solids (MLSS) and mixed liquor volatile suspended solids (MLVSS) concentration, food to micro-organisms ratio (F/M) and substrate utilization rate (SUR) were studied for over a year. Biomass growth phases ...
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Trace organics removal using three membrane bioreactor configurations: MBR, IFAS-MBR and MBMBR
Seventeen pharmaceutically active compounds and 22 other trace organic pollutants were analysed regularly in the influent and permeate from a semi-real plant treating municipal wastewater. The plant was operated during 29 months with different configurations which basically differed in the type of biomass present in the system. These processes were the integrated fixed-film activated sludge ...
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