sludge removal Articles
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Comparing Sludge Removal Systems For Water Treatment Plants
Due to limited clearance and accessibility, effective removal of settled sludge beneath tube settlers has long been a challenge for plant owners and design engineers. They needed a sludge removal solution with a low-profile design that would offer flexibility during operation and maintenance. In 2012, Brentwood introduced a new sludge removal system to fill those needs - SedVac. To prove ...
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Training: How to Remove Lagoon Sludge and Improve WWTP Outcomes
What should you do when your town is under multiple and ongoing consent orders for violations of its Montana Pollutant Discharge Elimination System (MPDES) wastewater discharge permit? Excessive lagoon sludge accumulation contributes to the poor performance of any treatment system, particularly in winter. Removing sludge from the lagoon cells will improve treatment at the facility and help to ...
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Sludge drying beds, Sarasota County, Florida - Case Study
Dewatering sludge at wastewater treatment plants has traditionally been a major operational concern. Most large operations must use mechanical filter presses or centrifuges to efficiently dewater their sludge. For many smaller operations, however, this equipment is too expensive and too large for their needs. Therefore, many smaller facilities rely on the sand filter drying beds for sludge ...
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Nutrient removal, microbial community and sludge settlement in anaerobic/aerobic sequencing batch reactors without enhanced biological phosphorus removal
Nutrient removal, microbial community and sludge settlement were examined in two 3-litre laboratory-scale anaerobic/aerobic sequencing batch reactors (SBRs). One SBR was operated at 10°C and the other SBR at 20°C. Different from conventional enhanced biological phosphorus removal, most of the soluble sodium acetate was removed in the aerobic phase and no organic carbon uptake or biological ...
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Considerations for the design and operation of a membrane bioreactor
This paper reviews recent advances in research focusing on the design and operation of a membrane bioreactor and including methodologies for determining the timing for hydraulic and sludge retention, sludge concentration optimisation, the removal of nitrogen and phosphorus, membrane fouling control, and the analysis of processing economics.Keywords: membrane bioreactors, activated sludge, ...
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Pilot plant trials: management of membrane concentrate
In surface water nanofiltration (NF) for drinking water production, 15 to 25% of the feed is rejected by the membranes. Two complementary approaches are investigated in order to manage concentrates. On one hand, an additional NF stage allows an increase in the yield of drinking water production from 85 to 94%. Thirty-days filtration cycles are achieved. Conductivity, natural organic matter (NOM) ...
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Activated sludge and chemical treatment process for Chemi-Thermo-Mechanical Pulping black liquors
Characterisation and treatment of the black liquor coming from Chemi-thermo-mechanical pulping (CTMP) of wheat straw was evaluated in this research. Toxicity of the liquor was evaluated and it was found high in Biological Oxygen Demand (BOD) 0.45%, Chemical Oxygen Demand (COD) 1.85%, dissolved solids 1.04%, suspended solids 0.33%, total sulphur contents 2.42% and silica contents 0.45%. Activated ...
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Calibration and validation of an ASM3-based steady-state model for activated sludge systems - part II: prediction of phosphorus removal
Abstract: An ASM3-based steady-state model which can be used for estimating the average nitrogen- removal, sludge-production and phosphorus-removal rates of different biological phosphorus-removing systems (AAO, UCT, intermittent processes) is developed. It considers the wastewater composition, the oxygen and nitrate input in the anaerobic compartment and the interaction between biological ...
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Biosorption kinetics and isotherms of copper (II) ions from aqueous solution and application of the MATLAB
In this study, biosorption kinetic and isotherm models were examined by the MATLAB for removal of copper ions from aqueous solution freely dead single Rhizopus arhizus and mixed dead waste sludge biomass. The copper ions removal efficiencies at equilibrium were 98%, 95% and 92% for freely dead R.arrhizus and two types of dead waste sludge. The experimental data fitted to pseudo-second order ...
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Manitou Drive Biosolids Drying Facility – Application Profile - Case Study
About the Project The WWTP is a conventional activated sludge process with chemical phosphorus removal, anaerobic sludge digestion and sodium hypochlorite disinfection, and has a rated design capacity of 123 million litres/day (MLD). The treated effluent is discharged to the Grand ...
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Manitou Drive Biosolids Drying Facility - Case Study
About the Project The WWTP is a conventional activated sludge process with chemical phosphorus removal, anaerobic sludge digestion and sodium hypochlorite disinfection, and has a rated design capacity of 123 million litres/day (MLD). The treated effluent is discharged to the Grand ...
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NSW Tannery benefits from highly efficient chrome removal process and a very dry sludge - Case study
NCMC (Northern Cooperative Meat Company) engaged Hydroflux Industrial to design and install a new treatment plant to remove Chrome from wastewater originating from the on site tannery in Casino, NSW. Located on the same site as the abattoir all hides are received immediately after slaughter and put directly into the chrome tanning process. The raw wastewater from the factory contains up to 300 ...
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Nitrogen removal from reject water with primary sludge as denitrification carbon source
A novel system was used for nitrogen removal from reject water. This system includes one anoxic/oxic reactor for nitrification and a special reactor for denitrification in which primary sludge was added intermittently as electron donor. In denitrification reactor, sludge fermentation and denitrification reaction took place simultaneously and promoted each other. It was found that effluent recycle ...
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Removal characteristics of retinoic acids and 4-oxo-retinoic acids in wastewater by activated sludge treatment
Retinoic acid (RA) receptor (RAR) agonists are potential teratogens to various vertebrates. Their contamination has been detected in municipal wastewater in different countries. This study involved field investigations and laboratory batch treatment experiments to elucidate the removal characteristics by activated sludge treatment of RAs (all-trans RA and 13-cis RA) and 4-oxo-RAs ...
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Freezing/thawing effect on sewage sludge degradation and electricity generation in microbial fuel cell
The effect of sludge freezing/thawing on its disintegration and subsequent use as substrate in a microbial fuel cell (MFC) was investigated to enhance organic matter degradation and electricity generation. Experimental results indicated that long freezing time (more than 48 h) was effective in disintegrating the sludge collected from the secondary sedimentation tank of a wastewater treatment ...
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Strategies for achieving energy neutrality in biological nutrient removal systems – a case study of the Slupsk WWTP (northern Poland)
The paper presents a model-based evaluation of technological upgrades on the energy and cost balance in a large biological nutrient removal (BNR) wastewater treatment plant (WWTP) in the city of Slupsk (northern Poland). The proposed upgrades include chemically enhanced primary sludge removal and reduction of the nitrogen load in the deammonification process employed for reject water ...
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Acid dye removal from industrial wastewater by adsorption on treated sewage sludge
This study investigated the suitability of sewage sludge for the removal of Acid Blue 93 industrial wastewater. Washed sewage sludge (WS) and sludge activated carbon (AS) were used as adsorbents. The effect of pH, contact time, adsorbent dose and adsorption temperature was studied. Equilibrium isotherms for the adsorption were analysed by Freundlich and Langmuir isotherm models. The ...
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Application of vibration milling for advanced wastewater treatment and excess sludge reduction
As a new sludge reduction technology with a phosphorus removal mechanism, a vibration milling technology that uses iron balls have been applied to the wastewater treatment process. Three anaerobic–aerobic cyclic activated sludge processes: one without sludge disintegration; one disintegrated sludge by ozonation; and the other disintegrated sludge with the vibrating ball mill were compared. ...
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Combinative treatment (thermal–anaerobic) of EBPR sludge for the enhanced release and recovery of phosphorous
In the present study an attempt has been made to recover phosphorus in the presence of poly P and to disintegrate sludge through combinative treatment. Primarily the sludge was treated by thermal method at a temperature range of 40° to 90°C. During thermal treatment, enhanced biological phosphorous removal (EBPR) sludge releases poly P and is found to be maximum at 60°C for three hours. Increase ...
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Treatment of eutrophic lake water and phosphorus recovery by reusing alum sludge and/or wood
Treatment of eutrophic lake water was investigated, when alum sludge and/or wood were used as the media for laboratory-scale filtration. Process 1 consisted of Column 1 with wood and Column 2 with alum sludge in series, and Process 2 of Column 3 with alum sludge. The filtration velocity was 0.45 and 0.91 m/d for 49 days each. Both processes removed suspended solids and total phosphorus well ...
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