activated sludge treatment Articles
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A neural network approach for on-line fault detection of nitrogen sensors in alternated active sludge treatment plants
In this paper, an effective strategy for fault detection of nitrogen sensors in alternated active sludge treatment plants is proposed and tested on a simulated set-up. It is based on two predictive neural networks, which are trained using a historical set of data collected during fault-free operation of a wastewater treatment plant and their ability to predict reduced (ammonium) and oxidized ...
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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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Full-scale control of Mycolata foam by FEX-120 addition
Foaming incidents in activated sludge treatment plants are a worldwide problem and occur on a regular basis in both municipal and industrial activated sludge treatment plants. Foaming is most often caused by excessive growth of filamentous bacteria, especially the gram-positive ones affiliated within the Actinobacteria, e.g. the branched Mycolata or CandidatusMicrothrix parvicella. Previous ...
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Bio-Microbics RollsAIR New Aeration System
The RollsAIR Extended Aeration System is an Activated Sludge Treatment system utilizing an aerobic wastewater treatment process It is designed to be a simple, low-cost, robust system of its type. The complete RollsAIR system uses the MyTEE in the "headworks" zone to screen trash and settle grit. The MyTEE screen deflects non-soluble solids to stay in the vault. All non-biological screened and ...
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Evaluation of acute ecotoxicity removal from industrial wastewater using a battery of rapid bioassays
The present study compares conventional wastewater treatment technologies (coagulation–flocculation and activated sludge) and powdered activated carbon (PAC) treatment for the removal of acute ecotoxicity from wastewater generated by tank truck cleaning (TTC) processes. Ecotoxicity was assessed with a battery of four commercially available rapid biological toxicity testing systems, ...
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Constructed wetlands for wastewater and activated sludge treatment in north Greece: a review
Constructed wetlands used for the treatment of urban, industrial and agricultural wastewater have become very popular treatment systems all over the world. In Greece, these systems are not very common, although the climate is favourable for their use. During recent years, there have been several attempts for the implementation of these systems in Greece, which include, among others, pilot-scale ...
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Case Study 3: Pulp and Paper Mill with Screw Press / Rotary Screen Thickener
Pulp and Paper Mill Bleached Kraft (1000 adt/d) and TMP mill, (1400 adt/d) UNOX activated sludge treatment, with primary and secondary clarification. Design flow: 50 MGD (230 MLD) Sludge Production: 89 t/day Application Equipment: FKC screw press with rotary screen thickener Old Mixer: Static mixer with throttling valve New mixer: 6” OPTIFLOC™ Flow: 130 IGPM (10 L/s) ...
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ISAM Sequencing batch Reactor375 m3/day - Case study
This project was incorporated as part of an existing municipal treatment plant expansion, and the effluent is discharged to a nearby surface water stream. The plant is now operated by the Ontario Clean Water Agency. H2FLOW EQUIPMENT INC. supplied a complete package with a PARKSON 6mm fine screw screen unit followed by a FLUIDYNE ISAM SBR system including blowers, and a TROJAN UV3000 PTP ...
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Effluent Treatment Plant (Distillery Effluent) Distillers Ltd, Trinidad.
Treating most stringent molasses based distillery effluent to discharge standard in Carebbian Region. A waste water treatment project for a Distillery in Caribbean region where W.O.G Group will be treating most stringent molasses based distillery effluent, as per local’s discharge norms. CHALLENGE: Treatment of stringent effluent generated by Molasses based distillery, having effluent ...
By WOG Group
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Wastewater Treatment Plants for the Textile Industry
The textile industry demands a significant amount of water , especially in the dyeing process, giving as result a complex wastewater that requires particular attention. Panta Rei has built a strong experience in this sector, and over the years it has become our core business and our specific area of expertise. We have installed water and wastewater treatment plants for some of the largest ...
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Activated Sludge Treatment Plant - Eatonton, Georgia - Case Study
Solids management at municipal wastewater treatment plants is crucial in maintaining operating efficiencies and permitted discharge levels. Drying beds and mechanical methods of dewatering bio-solids can be labor intensive and inefficient for rapid solids removal. Miratech Geotube" Dewatering Technology offers munic-ipalities a cost effective solution for rapid solids removal and long term solids ...
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Reduced order model monitoring and control of a membrane bioreactor system via delayed measurements
Activated sludge treatment is one of the most widely used processes for wastewater treatment (WWT). These systems are built with sufficient design margin to allow changes in loading and process conditions. This is necessary and prudent to overcome limitations in measurement, monitoring and controlling of WWT process parameters at the desired frequency. Online sensors for mixed liquor suspended ...
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Genome-scale metabolic modeling to provide insight into the production of storage compounds during feast–famine cycles of activated sludge
Studying storage metabolism during feast–famine cycles of activated sludge treatment systems provides profound insight in terms of both operational issues (e.g., foaming and bulking) and process optimization for the production of value added by-products (e.g., bioplastics). We examined the storage metabolism (including poly-β-hydroxybutyrate [PHB], glycogen, and triacylglycerols ...
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Technical and experimental evaluation of an innovative decentralized technology for the municipal wastewater treatment in the city of Rome
The present paper shows the results obtained through an experimental activity carried out on a pilot-scale plant using an innovative technology which couples the granular aerobic sludge with the sequencing batch process. Treatment efficiency and operation costs were evaluated in order to assess feasibility of this new technology for the upgrading of the existing continuous flow activated sludge ...
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The innovative Osmotic Membrane Bioreactor (OMBR) for reuse of wastewater
An innovative osmotic membrane bioreactor (OMBR) is currently under development for the reclamation of wastewater, which combines activated sludge treatment and forward osmosis (FO) membrane separation with a RO post-treatment. The research focus is FO membrane fouling and performance using different activated sludge investigated both at laboratory scale (membrane area of 112 cm2) and at on-site ...
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Top Applications of Shortcut Nitrogen Removal
Skipping a step streamlines treatment of a range of high-ammonia wastewater sidestreams Over the years there has been an ongoing quest to make wastewater nutrient removal more efficient than traditional activated sludge treatment, which is effective but uses a great deal of energy, carbon, and oxygen. There has been progress, starting with full nitrification-denitrification and simultaneous ...
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Improvement of the intersection method for the quantification of filamentous organisms: basis and practice for bulking and foaming bioindication purposes
Bulking and foaming phenomena in activated sludge wastewater treatment plants are in most cases related to the abundance of filamentous microorganisms. Quantifying these microorganisms should be a preliminary stage in their control. In this paper, the simplicity of quantifying them based on the intersection method is demonstrated, by redescribing the theory and applying a new improved ...
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Decentralized Wastewater Treatment
An application used worldwide, now growing in US to address the needs of small communities and developments Conventional sewer operations managed by small communities provide centralized treatment of wastewater of which residents are accustomed. But the expense of operating these systems as they expand with miles and miles of sewer lines is staggering. Expanding sewer line infrastructure, ...
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Black and Graywater: An overlooked environmental issue
Scienco/FAST, a manufacturer of marine sewage devices (MSD) based in St. Louis, Mo., has installed nearly 5,000 of its MSD units aboard towboats, tugs, offshore supply vessels, diving support vessels, pilot boats, containerships, tankers, bulk carriers, cruise ships, and many more types of vessels all around the world. The company has more than 50 years of research, development and real-world ...
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Prediction of sludge bulking using the knowledge-leverage-based fuzzy neural network
One of the most important steps and the main bottleneck of the activated sludge wastewater treatment process (WWTP) is the secondary clarification, where sludge bulking is still a widespread problem. In this paper, an intelligent method, based on a knowledge-leverage-based fuzzy neural network (KL-FNN), is developed to predict sludge bulking online. This proposed KL-FNN can make full use of ...
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