sludge aerator Articles
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Project - WWTP Hallstavik, Sweden
Plant: wwtp Hallstavik, Sweden Contractor: ATEK Avvattningsteknik AB Type of plant: Industrial Plant Start-up: 2005 Application: Sludge-Aeration with Carriers Scope of supply: 560 iCBA - Aeration Modules ...
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Municipal sludge characteristic changes under different aerating condition in a deep-shaft aeration system
A pilot-scale municipal sewage sludge deep-shaft aeration system was implemented in Lanzhou, Gansu Province of China. The reactor depth was 60 m with a diameter of 1.0 m and the sludge to be treated came from a wastewater plant in Lanzhou. In order to obtain the optimum operation conditions, analysis was conducted on the transformations of the volatile suspended solids (VSS), temperature, pH, ...
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Eliminating sludge islands in your wastewater lagoon
Old municipal and industrial wastewater lagoons have the tendency to build islands of sludge at various locations around the lagoon. It is most common for older lagoons to build such islands wherever wastewater enters the lagoons. Of course, this is because the solids entering the lagoon have enough weight to fall out of the water as flow velocity is reduced, so the solids pile up just after ...
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The application of model predictive control of ammonia nitrogen in an activated sludge process
In this paper a model predictive controller (MPC) for ammonia nitrogen is presented and evaluated in a real activated sludge process. A reduced nonlinear mathematical model based on mass balances is used to model the ammonia nitrogen in the activated sludge plant. An MPC algorithm that minimises only the control error at the end of the prediction interval is applied. The results of the ammonia ...
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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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HD#10 - BioLogix in High TPH Environment - Case Study
Summary A special blend of Delta’s microbes was successfully used to close oil field production pits as ordered by Alberta. Closure Rule 29-B required all non-utilized oil production pits closed with TPH levels less than 1%. These pits contained a mixture of drilling muds and produced water containing high concentrations of crude oil. The sludge had high water content and required aeration ...
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Real time control for reduced aeration and chemical consumption: a full scale study
The use of the activated sludge process (ASP) for the nitrification/denitrification of wastewaters is commonplace throughout the UK and many other parts of the industrial world. Associated with this process are significant costs arising from aeration requirements and for selected sites, the need to provide an external carbon source. These costs can constitute up to of 50% of the total running ...
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Case of Study – Low nitrification
BM Respirometer The respirometer utilized for the study was a BM-T, provided with external thermostatic unit (bath) This “batch system” respirometer consists of: a single reactor vessel, divided into two interconnected compartments with closed recirculation loop between the two. Both compartments are kept completely mixed by means of paddle stirrers and a peristaltic recirculation A ...
By SURCIS, S.L.
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Respirometry study of two different wastewater samples on COD fractioning & biodegradability for a specific activated sludge process and nitrification case study
Preliminary This service was made according to customer order points and indications from Hydrolab Microbiológica (Surcis collaborator) The client wanted Surcis to carry out a study about COD fractioning and nitrification. For this study the client has provided to Surcis the following: Process type: Activated sludge - Extended aeration 2 wastewater samples: the first one is a ...
By SURCIS, S.L.
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Dynamic changes of bacterial community in activated sludge with pressurized aeration in a sequencing batch reactor
This study aimed to investigate the organic removal efficiency and microbial population dynamics in activated sludge with pressurized aeration. The activated sludge was fed with synthetic wastewater composed of simple carbon source to avoid the effect of complex components on microbial communities. The pressurized acclimation process was conducted in a bench-scale sequencing batch reactor ...
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My diffuser goes up to eleven, actually twelve
Abstract Fine pore membrane diffusers arc used extensively worldwide for aeration of activated sludge basins. Aeration can account for as much as 60% of a plant's energy usage (Rosso, et al. 2005). Pore fouling and membrane material degradation can reduce energy efficiency of fine pore membrane diffusers to 50% of the original efficiency after just a few years of operation. Tins work ...
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Bacterial composition and nutrient removal with a novel PIA-A2/O sewage treatment
A novel post intermittent aeration anaerobic–anoxic–oxic (PIA-A2/O) process was developed to integrate shortcut nitrification–denitrification with denitrifying phosphorus (P) removal for domestic sewage treatment. With the transformation in configuration and phased start-up strategy, the nitritation rate and the ratio of denitrifying phosphorus accumulating organisms to phosphorus ...
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Performance of mechanical aerator in wastewater treatment with special reference to oxidation ditch: a critical review
Mechanical aerators used in wastewater treatment are the largest energy consumers in biological reactors. Well-known researchers have been working on the oxygen transfer by mechanical aerators in oxidation ditch process and they have successfully enhanced the efficiency of aeration system with considering the factors affecting oxygen transfer such as speed of rotors and geometry of aeration ...
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Plant Solutions - Minerva W.W.T.P - Village of Minerva - Case Study
The Village of Minerva is just east of Canton, Ohio on Route 30. Our W.W.T.P. is an activated sludge, extended aeration plant with a 930,000 g.p.d. design. Typically we get a 2% solids concentration sludge from the digestors and for many years we were able to land apply. Unfortunately, a few years ago we had to stop this land application due to problems with our sludge. This article deals with ...
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Increased plant efficiency, City of Checotah, Oklahoma
The City of Checotah, Oklahoma was experiencing excessive solids, foam and grease in their 0.5 MGD extended aeration activated sludge treatment facility. With a daily average flow of 0.25 million gallons per day, the plant had tremendous amounts of foam and grease in the aeration basin with the sidewalls caked with sludge. The centerwells of the clarifier were filled with foam and grease. The ...
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Development of a model for activated sludge aeration systems: linking air supply, distribution, and demand
During the design of a water resource recovery facility, it is becoming industry practice to use simulation software to assist with process design. Aeration is one of the key components of the activated sludge process, and is one of the most important aspects of modelling wastewater treatment systems. However, aeration systems are typically not modelled in detail in most wastewater treatment ...
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Development of a model for activated sludge aeration systems: Linking air supply, distribution, and demand. Proceedings WWTmod2016
Abstract: During the design of a wastewater treatment plant (WWTP), it is becoming industry practice for engineers to use simulation software to assist with process design. Aeration is one of the key components of the activated sludge process, and is one of the most important aspects of modelling wastewater treatment systems. A comprehensive dynamic aeration system model has been developed that ...
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Columbus, Texas - Case Study
The Columbus WWTP was receiving an overload of grease from restaurants. Some of the grease was traveling only 150 yards before discharging directly into the WWTP. Because of the grease received at the plant, there was little settling occurring in the 30-minute settling tanks, despite personnel maintaining a low mixed liquor in the aeration basin. The plant was hauling off up to seven loads of ...
By BioCOPE Inc.
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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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BM Respirometry Study Toxicity & Biodegradability of a Refinery polymer stream, when treated in the activated sludge process of the plant - Case Study
This “batch system” respirometer consists of: a single thermostatically controlled vessel, divided into two interconnected compartments with closed recirculation loop between the two. A constant air flow is supplied via a ceramic diffuser in the conditioning compartment, and a combined oxygen/temperature sensor in the reaction compartment controls the DO and temperature. Both ...
By SURCIS, S.L.
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