sludge removal Articles
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Harlem, MT USA WWTP Uses FLUMP - 2013-case study
Excessive lagoon sludge accumulation contributes to the poor performance of any treatment system. Removing sludge from lagoon cells improves treatment and addresses violations in the Department of Environmental Quality enforcement action. The City of Harlem, Montana has a three cell partially mixed aerated lagoon system constructed in 1985. The lagoon system discharges to the Milk River. ...
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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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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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Removal of sludge deposits from the floor of a lagoon case study
Massive fat oil and grease sludge deposits on the floor of the lagoon were contaminating the lagoon in the following pictures. The depth of these deposits was such that they were protruding through the surface of the water. The customer required their removal. The surface aerator installed for the purposes of mixing and oxygenation can be seen in the picture. In order to deal with these deposits ...
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The optimal dissolved oxygen profile in a nitrifying activated sludge process – comparisons with ammonium feedback control
Ammonium feedback control is increasingly used to determine the dissolved oxygen (DO) set-point in aerated activated sludge processes for nitrogen removal. This study compares proportional-integral (PI) ammonium feedback control with a DO profile created from a mathematical minimisation of the daily air flow rate. All simulated scenarios are set to reach the same treatment level of ammonium, ...
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Comparative analysis of extended aeration and Fenton process in landfill leachate treatment
This research is undertaken to investigate various operating conditions for minimising sludge disposal and maximising chemical oxygen demand from leachate. With conventional extended aeration process the optimum removal of COD and colour were 36% and 24% respectively. In Fenton process, for optimum pH of 5 and optimum H2O2/Fe2+ molar ratio of 1.3, the dosages of H2O2 and Fe2+ were found 1000 mg/l ...
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Wastewater lagoons – a new aeration concept
The use of wastewater treatment lagoons, or stabilization ponds, is a common practice for rural municipalities and industrial facilities. Through the years there have been numerous designs for these ‘sludge settling basins,’ ranging from facultative, partial aerated, and fully aerated systems. But the primary reason for these systems is to utilize relatively shallow earthen ponds, or ...
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Process performance evaluation of the contact stabilisation system at Birzeit University
The purification capacity of the contact stabilisation system at Birzeit University campus has been studied for two years. The oxidation capacity of organic matter, ammonium oxidation, and denitrification potential were determined. The reduction of chemical oxygen demand (COD) was 85%, and the effluent COD concentration was less than 110 mg/l (the average value was 88 mg/l). Suspended solids were ...
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DO2E Algae Monroeville, Alabama - Case Study
Problem: The city of Monroeville, Alabama, had aeration and mixing issues, a sludge build-up, and an algae problem in their sewage lagoon. This was the result of a decrease in the wastewater influent of 90% from a recently lost (shipped overseas) garment manufacturing facility the loss of which filled the sewage lagoon 80% with an increased biosolid loading. Solution: DO2E provided two (2) 5 ...
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Improvement of nitrogen removal at WWTP Zurich-Werdhoelzli after connection of WWTP Zurich-Glatt. Water Science & Technology
Abstract: Optimisation of nitrifying activated sludge plants towards nutrient removal (denitrification and enhanced P-removal) leads to a substantial reduction of operating costs and improves effluent and operating conditions. At WWTP Zürich-Werdhöelzli, initially designed for nitrification only, an anoxic zone of 28% of total activated sludge volume was installed and allowed 60% ...
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Compost Leachate Pond Bioremediation Case Study - Composting Facility, Northern California
Our client runs a composting facility that receives green waste, food waste and other compostable material from residential and commercial sources, to create rich, black compost Challenge As part of the facility, the compost leachate pond has repeatedly experienced problems with the incoming influent high chemical oxygen demand (COD) and biological oxygen demand (BOD) levels, foul odors and ...
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Aquarius Provides Simple Solutions to Tightening Septic System Regulations
As septic systems come under regulatory scrutiny by a growing number of states and the EPA, one company is offering simple, cost-effective solutions to replace them. Aquarius Technologies offers the Nebula® MultiStage Biofilm System, which is helping single systems and small communities to manage organic removal, nitrification, denitrification, and dramatically reduce sludge production. For ...
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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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Alternate anoxic/aerobic operation for nitrogen removal in a membrane bioreactor for municipal wastewater treatment
A large pilot-scale membrane bioreactor (MBR) with a conventional denitrification/nitrification scheme for municipal wastewater treatment has been run for one year under two different aeration strategies in the oxidation/nitrification compartment. During the first five months air supply was provided according to the dissolved-oxygen set-point and the system run as a conventional ...
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Low dissolved oxygen membrane bioreactor processes (LDO–MBRs): a review
Aeration energy demands for bioprocesses and membrane scouring in membrane bioreactors (MBRs) account for 50% to over 70% of the total operational energy consumption. Energy saving achieved by operating MBRs under low dissolved oxygen (DO) would be an interesting approach to bring MBRs to higher levels of efficiency. This review paper is first carried out to provide a systematic investigation on ...
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Do you Know the Reasons for These Problems in the Aerobic Tank?
The aerobic tank is a structure that maintains the dissolved oxygen content suitable for the growth and reproduction of aerobic microorganisms through aeration and other measures to treat pollutants in the water. The function of the aerobic tank is to allow the activated sludge to perform aerobic respiration, further decompose organic matter into inorganic matter, and remove pollutants. ...
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The effects of different aeration modes on ammonia removal from sludge digester liquors in the nitritation–anammox process
The aim of this study was to determine the impact of continuous and intermittent aeration on the rate of ammonia removal in the combined nitritation–anammox process. This process was run in two parallel sequencing batch reactors (SBRs), with a working volume V = 10 L, treating sludge digester liquors from the Gdansk (Poland) wastewater treatment plant (WWTP). The ammonia oxidizing ...
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Regarding on-site sludge digestion issues
As those who manage and/or operate waste treatment facilities of one sort or another, at the end of the process all are faced with that age old question – What now? How do we get rid of the finished “by-products”? We have several options among which are deep-well injection, holding and polishing ponds, or discharge into an existing body of water be it a stream, lake, or even the ...
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Onsite sludge digestion with patent DO2E aeration technology
As those who manage and/or operate waste treatment facilities of one sort or another, at the end of the process all are faced with that age old question – What now? How do we get rid of the finished “by-products”? We have several options among which are deep-well injection, holding and polishing ponds, or discharge into an existing body of water be it a stream, lake, or even the ...
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Bio-Augmentation Process Reduces Odors and Organic Sludge Build- Up
Efficiently operating a wastewater treatment plant within budget and permit limits gets more challenging by the day! Plant administrators are constantly facing the battle of costly sludge disposal, noxious odor control and rising electricity expense. The City of Meridian, Mississippi also fell into this category until it made the decision in 2005 to utilize a product marketed by Reliant Water ...
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