bioaugmentation Articles
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Vermont Dry Cleaner Remediation Using CL-Out
Cl-Out bioremediation was used to remove PCE from ground water at a dry cleaners in Vermont. CL-Out micorbes were selected for bioremediation of the site because they are compatible with the natural aerobic aquifer conditions. One application of CL-Out bioaugmentation reduced the PCE concentration by 90% in less than 6 months without increasing the vinyl chloride concentrations. The following ...
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Impact on nitrifiers of full-scale bioaugmentation
Nitrifiers are the slowest growing bacteria used in conventional biological wastewater treatment. Furthermore, their growth rate is seriously hampered by low temperature. As a result, the volume needed for nitrification dominates the volume of the biological reactors at a wastewater treatment plant. As a way of enhancing nitrification and reducing this volume, bioaugmentation can be used. ...
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Continuous treatment of Acid Red B with activated sludge bioaugmented by a yeast Candida tropicalis TL-F1 and microbial community dynamics
Continuous treatment of Acid Red B (ARB) with activated sludge (AS) bioaugmented by an azo-degrading yeast Candida tropicalis TL-F1 under aerobic conditions was investigated in the form of sequencing batch tests. Dynamics of both bacterial and fungal communities were analyzed using polymerase chain reaction followed by denaturing gradient gel electrophoresis (PCR-DGGE) method. The results ...
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Modeling bioaugmentation with nitrifiers in membrane bioreactors
Bioaugmentation with nitrifiers was studied using two pilot-scale membrane bioreactors, with the purpose of assessing the suitability of state-of-the-art activated sludge models (ASMs) in predicting the efficiency of bioaugmentation as a function of operating conditions. It was demonstrated that the temperature difference between seeding and seeded reactors (ΔT) affects bioaugmentation ...
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Success in the Lab Leads to Success in the Field
Success in the Lab Leads to Success in the Field Superfund Site in Pennsylvania Problem: Degrade TCE in the presence of 1,1,1-TCA They said it couldn't be done. Most strains of Dehaloccoides (Dhc) would not dechlorinate TCE in the presence of 1,1,1-TCA. Solution: BCI Lab in 2005 BCI developed the first strain of Dhc that could resist TCA toxicity at concentrations of TCA at 15 ppm. ...
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The Environmental Biotechnology Industry
Dr Tony Brooke of CBIO gives an honest opinion of the current state of the Environmental Biotechnology industry and how it is perceived by potential customers What is the role targeted bioaugmentation has in optimising treatment plant operation? Risking an unfair generalisation the water industry could be labelled as broadly sceptical regarding the benefits of bioaugmentation. This scepticism ...
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Case Study of Petrox® Bioaugmentation to Remediate Pesticides in Ground Water to Part Per Trillion Concentrations
This case study of bioaugmentation demonstrates that Petrox bioaugmentation can achieve the very low remediation goals set for pesticides in ground water – quickly and cost effectively. After three injections of Petrox®, the contaminant concentrations were reduced by 99% in less than 9 months. Project highlights are: Source area maximum dieldrin concentrations decreased from 9.8 ...
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Application of Bioaugmentation for quick restoration of microbial activity in a Cheese WWTP
The use of Bioaugmentation has been shown to be a very effective method of restoring activity in a wastwater treatment plant treating the effluent from cheese production. The plant had lost activity and in this case activity was restored without removing the existing dead biomass. This presented a considerable challenge and resulted in considerable savings for the client since the dead sludge ...
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Improving Long-Term Bioremediation Results with Nutrients
The goal of bioaugmentation is to improve the rate of contaminant removal by adding a high population of beneficial microbes to the contaminated media. The additional microbes should provide short-term benefit as the microbes begin metabolizing the contaminants immediately upon injection. But what benefit does bioaugmentation provide in the long term? And how much benefit does bioaugmentation ...
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Bioaugmentation Following ISCO Treatment
CL-Out bioaugmentation was implemented following ISCO treatment of TCE-contaminated ground water. Through bioaugmentation the ground water remediation was complated and ground water conditions were restored in 30 days. Background The chlorinated solvent trichloroethylene (TCE) was discovered in ground water at a manufacturing facility in eastern Massachusetts. ISCO was selected for remediation ...
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Models for nitrification process design: one or two AOB populations?
Models for engineering design of nitrifying systems use one ammonia oxidizer biomass (AOB) state variable. A simple extension using two AOB populations allows a more accurate prediction of nitrification systems at switching process environments. These two AOB subpopulations are characterized by two different sets of kinetic parameters. Selection pressure and competition between the two functional ...
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Fast Creosote Bioremediation Results
Creosote bioremediation was recently demonstrated by a user of a custom blend of CL Solutions organisms. The environmental consulting firm applied the microbes to finely shredded wood that had been saturated with creosote. The initial testing results after bioaugmentation showed a reduction of the creosote concentration by 57% in just 7 days. The concentration measured as total recoverable ...
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Prospective environmental and economic assessment for biotreatment of micropollutants in drinking water resources in Denmark
A prospective environmental life cycle assessment (LCA) and financial cost assessment is performed to the application of bioaugmentation to sand filters in Danish waterworks, to remove 2,6-dichlorobenzamide (BAM) from drinking water resources. Based on pilot-scale and laboratory-scale data, we compare bioaugmentation to current alternative strategies, namely granular activated carbon (GAC) ...
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Going for mainstream deammonification from bench to full scale for maximized resource efficiency
A three-pronged coordinated research effort was undertaken by cooperating utilities at three different experimental scales investigating bioaugmentation, enrichment and performance of anammox organisms in mainstream treatment. Two major technological components were applied: density-based sludge wasting by a selective cyclone to retain anammox granules and intermittent aeration to repress ...
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1,1,1-TCA Bioremediation with CL-Out - Case Study
Site Summary CL-Out bioaugmentation was implemented to remediate 1,1,1-TCA in ground water at an operating steel manufacturing facility. The source area was initially treated by ozone injection for two years. Then, a high vacuum extraction system was installed in the source area for two years. These efforts reduced the concentration of contamination in the source area, but the 1,1,1-TCA ...
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Dr. Leo Lehmicke presents paper at Battelle conference
In May, Dr. Leo Lehmicke presented a paper titled “Anaerobic Biodegradation of TCE in Groundwater Following In Situ Thermal Treatment” at the Battelle Conference in Monterey on Remediation of Chlorinated and Recalcitrant Compounds. The presentation describes the successful application of bioaugmentation to treat residual TCE following steam enhanced treatment of a high concentration source ...
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Enrichment and application of nitrifying activated sludge in membrane bioreactors
In this study, nitrifying bacteria were enriched in a membrane bioreactor (MBR, R1) and their bioaugmentation effectiveness was evaluated in another two MBRs (R2 and R3). Nitrifying activated sludge (NAS) with high nitrification activity of up to 3,000 mg-N/(L·d)−1 was successfully enriched in R1. The results showed that chemical oxygen demand concentration of 100–200 mg/L had no negative ...
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BIOAUGMENTATION MAINTAINS AMMONIA DISCHARGE CONSENTS
A market leader in biomass engineering has launched a 24-hour biological safeguard system to protect organisations operating treatment plants against discharging illegal levels of ammonia. North East-based Cleveland Biotech (CB) has seen an increase in enquiries for its Amnite NS5000 product from companies which are obliged to prove to authorities they adhere to legal constraints over their ...
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Promotion of nitrifiers through side-stream bioaugmentation: a full-scale study
Bioaugmentation of nitrifiers from a side-stream treatment is an efficient method for boosting the mainstream process at a wastewater treatment plant (WWTP). Although this technology has been known for several years, the number of full-scale applications for it is limited. For a WWTP approaching its critical nitrogen load capacity, the benefits are doubled if the introduced side-stream ...
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Petrox Bioremediation of Phthalates - Case Study
Background Phthalates are common industrial chemicals used in the production of plastics, lubricating oils, and cosmetics. Pseudomonas sp. have been shown to be capable of metabolizing a variety of phthalates. Petrox bioaugmentation has been tested in the laboratory and used in a field application to remediate several phthalates. The metabolic pathway has not been determined, but the metabolism ...
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