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Showing 1 to 18 of 18 for “"bioflocculation"”.
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Bioflocculation of Wastewater Treatment Pond Suspended Solids
<p><strong>Bioflocculation of Wastewater Treatment Pond Suspended Solids</strong></p> <p><strong>Louis Lefebvre</strong></p> <p>Wastewater treatment lagoons and high rate algae ponds (HRAPs) can provide cost effective wastewater treatment, but they commonly have high effluent concentrations of …
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Bioflocculation for Control of Wastewater Pond Microalgae
… several hypotheses regarding the use of bioflocculation as a harvesting method for wastewater pond microalgae. Research performed on pilot-scale high rate ponds (HRPs) on the California Central Coast.</p>
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Bioflocculation: Implications for Activated Sludge Properties and Wastewater Treatment
Studies were conducted to determine the role of bioflocculation in the activated sludge unit processes. Laboratory and full-scale studies revealed that bioflocculation is important in determining settling, dewatering, effluent and digested sludge properties (activated sludge properties) and may be …
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Bioflocculation and CO2 Supplementation in Wastewater Treatment by Algal High-Rate Ponds
… the effects of operational variables on bioflocculation and nutrient removal in 3-m2 algal high-rate ponds.</p>
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Exocellular Polymeric Substances, Bioflocculation and Sludge Settling Properties in a Combined Anaerobic/Activated Sludge Process
… chamber hydraulic residence (HRT) time in which bioflocculation occurs satisfactorily (effluent SS concentrations < 20 mg/L) is 15 min; however, in the combined anaerobic/aerobic system HRT< 100 minutes resulted in poor floc settling properties and turbid supernatants. Exocellular polymeric …
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An investigation of laser light scattering for the measurement of micron size particles with application to bioflocculation
The activated sludge wastewater treatment process depends upon the formation of biological floc for effective liquid-solids separation, nutrient stabilization and sludge dewatering. Continued research into floc formation, intrafloc interactions and floc hydrodynamics is necessary for improved …
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Effect of Reactor Feeding Pattern on Performance of an Activated Sludge SBR
… on activated sludge properties related to bioflocculation have been analyzed in lab scale sequencing batch reactors (SBR) in order to determine if these changes in effluent water quality and settling and dewatering properties are significant, so they can be considered in future studies or …
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The Kinetics of Particulate Substrate Utilization by Bacterial Films
… explain the role of biological flocculation, or bioflocculation, in particulate removal. In the literature, Fick's first law and zero-order kinetics have described the diffusion and biochemical reaction of soluble substrate within the bacterial film matrix (when completely penetrated), …
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The roles and interactions of cations, proteins, and polysaccharides in the settling and dewatering of activated sludge
… the data supported the cation bridging model for bioflocculation, and the cations act to bind protein to the biofloc structure. Results from the full-scale activated sludge plants correlated well with results from laboratory activated sludge systems and demonstrated the cation content in these …
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Kinetics of DCOD Consumption by Bacterial Suspensions
… substrate, and the interactions between the bioflocculation process and such kinetics. Several batch test experiments were performed at different soluble-substratebiomass ratios in order to evaluate its impact on the kinetics and the order of the reaction. Similarly the consumption of …
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Effect of Feed Rate and Solid Retention Time (SRT) on Effluent Quality and Sludge Characteristics in Activated Sludge Systems Using Sequencing Batch Reactors
… is efficient solid liquid separation achieved by bioflocculation. Bioflocculation refers to the process of microbial aggregation to form activated sludge flocs, dependent on the interaction of exocellular polymeric substances (EPS) to form the matrix that holds microbes, other organics and …
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Mathematical Modeling of Carbon Removal in the A-Stage Activated Sludge System
… which do not allow for complete enmeshment and bioflocculation of these particles as occurs in conventional activated sludge systems (which have longer solid retention times and hydraulic retention times). It was necessary to add several processes (both stoichiometry and kinetic equations) to …
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Improved Microalgal Biomass Harvesting Using Optimized Environmental Conditions and Bacterial Bioflocculants
… harvesting method, among many other factors. Bioflocculation and settling of suspended microalgae cultures is a harvesting method with potentially low cost and energy input. However, bioflocculation (the spontaneous flocculation of algal cells without chemical addition) has not been a reliable …
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Microbial flocculation for large scale harvesting of marine microalgae for the production of biodiesel.
… of biodiesel and laboratory experiment showed bioflocculation by pH stress is ineffective. Microbial flocculation is based on the principle that by stressing certain bacteria, extracellular polymeric substances (EPS) may be produced to co-flocculated the microalgae. With a dosage of 0.1 g L⁻¹ …
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Effects of Raceway Pond Water and Nutrient Recycling on Microalgae Production and Harvesting
… which can be energy intensive and expensive. Bioflocculation of algae cells followed by sedimentation is a low input harvesting method, but one that might be affected by resource recycling. In the present 7-month study, algae productivity and settleability were measured for several types of …
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Optimizing high-rate activated sludge: organic substrate for biological nitrogen removal and energy recovery
… quality became dependent on the efficiency of bioflocculation and solids separation. While the SRT of the pilot process could not be directly controlled because of severe biofouling issues when using in situ sensors, a MLSS-based SRT controller was successfully implemented instead. The …
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Extracellular Polymeric Substances in Activated Sludge Flocs: Extraction, Identification, and Investigation of Their Link with Cations and Fate in Sludge Digestion
… In spite of their critical involvement in bioflocculation and long history of related research, our understanding of EPS is still greatly limited and better elucidation of their composition and structure is needed. The hypothesis of this research was that activated sludge floc contains …