phosphorus treatment Articles
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A non-phosphorus water treatment agent in water injection system: inhibiting strontium sulfate and dispersing ferric oxide
Due to the increasing temperature in water injection system, scales are sediments that are firmly attached on the metal surface in the industrial equipment. These scales, including calcium and ferric oxide precipitations, can cause heat transfer problems. A non-phosphorus water treatment agent APES/AA/AMPS was synthesized by acrylic acid (AA), ammonium allylpolyethoxy sulphate (APES) and ...
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Effect of polyaluminium chloride on phosphorus removal in constructed wetlands treated with swine wastewater
Total phosphorus (TP) removal in aged constructed wetlands poses a challenge, especially when treated with swine wastewater with high concentrations of phosphorus (P). Our earlier studies with anaerobic lagoon swine wastewater treatment in constructed wetlands showed a decline in P removal (45–22%) with increased years of operation. These particular wetlands have been treated with swine ...
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IPEX Double Containment PVC System Protects Chemical Lines at North Toronto Wastewater Treatment Plant Case Study
Originally commissioned in 1929, the North Toronto Wastewater Treatment Plant is one of four wastewater treatment facilities operated by the City of Toronto. Located in the Don Valley, the plant currently serves a population of about 55,000. The facility operates at a rate of about 7.5 million gallons per day (mgd) with major treatment processes that include screening and grit removal, primary ...
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Land application of Water Treatment Residuals: effect on wheat yield and the availability of phosphorus and aluminium
Water Treatment Residuals (WTR) can be a potential source for available phosphorus (P) and Al, but the influence of WTR rates on the dynamics of available P and Al and plant uptake in alkaline soils are not well documented. Our objective was to evaluate the effects of WTR (Alum-sludge) on the agronomic performance of wheat crop grown in alkaline soils as well as P and Al availability and ...
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The short-term effects of prescribed burning on biomass removal and the release of Nitrogen and Phosphorus in a treatment wetland
Nutrient removal by constructed wetlands can decline over time due to the accumulation of organic matter. A prescribed burn is one of many management strategies used to remove detritus in macrophyte-dominated systems. We quantified the short-term effects on effluent water quality and the amount of aboveground detritus removed from a prescribed burn event. Surface water outflow concentrations were ...
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Dissolved-air flotation associated with an anaerobic reactor, as applied to sewage treatment
This paper presents the results of a study performed with a pilot sewage treatment plant consisting of an aerobic reactor followed by a flotation unit. To coagulate the anaerobic effluent, different ferric chloride dosages were applied by adopting two approaches: applying constant dosages during the essay and varying the dosages according to the anaerobic effluent turbidity. To obtain more than ...
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The revival of tertiary continuous filters
Tightening ef uent consents due to river water quality drivers require further investment for improved removal of nitrogen and phosphorus from Wastewater Treatment Plants (WwTP). As a result, tertiary treatment processes have become increasingly important. This has led to a need to gain a better understanding of the process and mechanics of tertiary removal systems in order to remain both ...
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Ferric Chloride Distribution, Phosphorus Reduction in a Wastewater Pond (ID36) - Wastewater Treatment System USCAWW-2803.001 - Case Study
Topics: wastewater, ammonia, energy savings, facultative, phosphorus, short-circuiting, treatment savings Overview: This is a municipal wastewater treatment system for the city. The system consists of a series of four ponds. Storage Pond #1 has a surface area of 1.3 acres, with a volume of 3.5 MG. Storage Pond #2 has a surface area of 4.2 acres, with a maximum depth of 12 ft, volume of about 10 ...
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Study on Fully Coupled Activated Sludge Model No. 1 (FCASM1) for wastewater treatment biological processes
Nowadays many types of model based on the Activated Sludge Models (ASMs) have been developed. Most of them supposed that all the substrate removal processes are independent. Based on the mechanism of the interaction among microorganisms and considering the interaction among the processes of organisms oxidation, nitrifying, denitrifying and biological phosphorus removal, Fully Coupled Activated ...
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Effect of aluminum-containing amendments on phosphorus sequestration of wastewater treatment Wetland soil
Little research has been conducted on methods to restore the P removal capacity of older constructed wetlands, as P treatment capacity can decrease with time. We investigated the capacity of alum and three Al-containing alternatives (alum residual, polyaluminum chloride [PAC], and partially neutralized aluminum sulfate [PNAS]), at three rates (9, 18, and 36 g Al m–2) to reduce P concentrations. ...
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Experiences on dual media filtration of WWTP effluent
This research is legislation driven by the European Water Framework Directive (WFD) and the Dutch Fourth Memorandum on Water Management. The objective of this research is to achieve the removal of total nitrogen and total phosphorus by Dual Media Filtration. The target value during this research for total nitrogen is 2.2 mg/L and for total phosphorus 0.15 mg/L. The results show that for NOx-N ...
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Dairy Effluent Treatment - Total Phosphorus Monitoring
Dairy Crest's Davidstow site operates a sophisticated effluent treatment plant to ensure that the local aquatic environment is protected. The treatment plant has been upgraded to keep pace with the expansion of the factory and a number of our monitoring instruments have been employed to make the operation of the plant as efficient as possible. During 2011, the Environment Agency approached Dairy ...
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Application of acidic thermal treatment for one- and two-stage anaerobic digestion of sewage sludge
The effectiveness of acidic thermal treatment (ATT) was examined in a 106-day continuous experiment, when applied to one- or two-stage anaerobic digestion of sewage sludge (4.3% TS). The ATT was performed at 170°C and pH 5 for 1 hour (sulfuric acid for lowering pH). The one-stage process was mesophilic at 20 days hydraulic retention time (HRT), and incorporated the ATT as pre-treatment. The ...
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Phosphorus recovery from sewage sludge using the Aquacritox supercritical water oxidation process
Abstract Every person produces approximately 1.2kg/annum of phosphorous. This is typically conveyed to a wastewater treatment plant. In the United Kingdom, the annual phosphorus load from human sources which is present in wastewater is therefore approximately 72,000 tonnes. This would have a value in the region of US$168M per annum based on current market prices. This paper examines how the ...
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Investigation of OUR and NUR experiments for nitrogen and phosphorus removal with activated sludge: a lab-scale study
Activated sludge systems are widely used in wastewater treatment. Organic carbon removal and nutrient removal are important for stringent water discharge standards. Therefore, activated sludge systems are widely used to remove carbon, nitrogen and phosphorus in new wastewater treatment systems or upgrades of existing systems. The determination of system compounds and kinetic parameters for ...
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Advanced treatment of WWTP effluent with filtration leading to a pretreatment technique for membrane filtration
In 2000 the European Union introduced the Water Framework Directive (WFD). The aim of the WFD is having an ecological and chemical balance for all surface waters in Europe in 2015. The European Commission identified 33 priority substances and their maximum allowable concentrations, FHI-values (Fraunhofer Institute), which are specified in the Annex of the WFD. The objective of this research is to ...
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Mixing Energy Savings, Enhanced Phosphorus Removal - Wastewater Treatment Plant USMIWW-LOC759.001 (ID209) - Case Study
Topics: wastewater, energy savings, sludge reduction, facultative, partial mix Overview: The municipal WWTP consists of three cells at 32.4 surface acres. Cell one is controlled discharge, partial mix, and 7.23 surface acres with an operating depth of 6.0 ft. Cell two is controlled discharge, facultative, 7.5 surface acres with an operating depth of 10.0 ft. Cell three is controlled discharge, ...
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Ferric chloride distribution, Phosphorus reduction in a Wastewater pond- Case study
Topics: wastewater, ammonia, energy savings, facultative, phosphorus, short-circuiting, treatment savings Overview: This is a municipal wastewater treatment system for the city. The system consists of a series of four ponds. Storage Pond #1 has a surface area of 1.3 acres, with a volume of 3.5 MG. Storage Pond #2 has a surface area of 4.2 acres, with a maximum depth of 12 ft, volume of about ...
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Bio-Organic Flocculant Treatment for Phosphorus Removal: A Zeoturb - Case Study
Problems with Phosphorus in Wastewater Regulating the discharge of phosphorus from industrial and municipal wastewater treatment plants is a primary factor in averting eutrophication of surface water sources. Phosphorus is one of the key nutrients that contribute to this process in both lakes and natural waters. Its existence has caused major water quality issues such as diminished recreational ...
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Microbial community structure of a simultaneous nitrogen and phosphorus removal reactor following treatment in a UASB-DHS system
The anaerobic–anoxic sequence batch reactor (A2SBR) was applied to achieve nitrogen and phosphorus removal in an energy-saving sewage treatment system involving an up-flow anaerobic sludge blanket combined with a down-flow hanging sponge reactor to treat municipal sewage. After sludge acclimation, the A2SBR showed satisfactory denitrification and phosphorus removal performance with total ...
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