process wastewater sludge Articles
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Processing Wastewater Sludge Using Dewatering Containers
The relative cost of dewatering equipment varies widely and is directly related to the processing rate. For smaller utilities that need to dewater sludge in batches, dewatering containers are an alternative that can be relatively inexpensive and simple when compared to other technologies on the market. The most common type of dewatering container is based on a roll-off box design, although any ...
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Minergy GFT Supplemental Sediment
The purpose of the Study is to evaluate the economic and technical feasibility of melting PCB contaminated river sediments in a glass furnace. The Glass Furnace Technology (GFT) was developed by Minergy. Minergy originally developed vitrification technologies to process wastewater sludge into glass aggregate that could be sold as a commercial product. The technology was evaluated during a U.S. ...
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The reuse of wastewater and sludge for cultivation of forestry trees in desert areas in Greece
Processed wastewaters and sludges can be used in the irrigation of forest and desert areas for the cultivation of different plant species. Their use in the reforestation of desert areas is particularly interesting because it not only addresses the important modern problems of water shortage and desertification, but also reduces the pollution of aquatic ecosystems that are used as the final ...
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Environmental sludge treatment
During the process of wastewater treatment, sludge generation is an important and at times crucial issue to be addressed as inadequate sludge handling system can pose serious environmental implications. Liquid sludge can be easily thickened and reduced to a solid cake via sludge thickening / dewatering. This reduces the volume of liquid sludge significantly, usually resulting in a quite ...
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Cost assessment of different routes for phosphorus recovery from wastewater using data from pilot and production plants
Phosphorus (P) recovery from wastewater has considerable potential to supplement limited fossil P reserves. Reliable cost data are essential for investor and policymaker decisions. In this study, investment and operational costs for nine P recovery processes were calculated from the investor's perspective, taking into account all relevant side effects on the sludge treatment or the wastewater ...
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Polyhydroxyalkanoate (PHA) production potential of activated sludge from food industrial wastewater treatment process
Polyhydroxyalkanoate (PHA) production by activated sludge treating food industrial wastewaters was evaluated. Influence of wastewater characteristics on PHA production activities of non–acclimatised and acclimatised sludge were determined. Acetate, glucose and butyrate were used for evaluating PHA production potential of sludge at different concentrations of 400, 800 and 1,200 mgC/l during 12 ...
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What Is the Sludge Treatment Process?
Raw, untreated sewage is a serious hazard to the environment as well as to the nearby population. However, through proper treatment, wastewater facilities can keep up with demand, reduce pathogenic risks, and reintroduce clean water back into the environment. Learn more about the role of sludge treatment in improving wastewater processing. Sewage Sludge When municipal wastewater treatment ...
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California’s city of roseville chooses HERO ZLD
The Facility The Roseville Energy Park (REP) will be a natural gas-fired, combined-cycle electrical generating facility. The project, planned for a 12-acre site, will be owned by the city and will use state-of-the-art equipment to locally generate about 60 percent of Roseville’s electricity needs. The Roseville Energy Park will use recycled wastewater from the nearby Pleasant Grove ...
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The Process Flow Of Wastewater Sludge Treatment
Sludge is the product of sewage treatment, and heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. What is in wastewater sludge? Sludge is the product of wastewater treatment, which is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. Therefore, it is extremely important to ...
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4-Step Wastewater Sludge Treatment Process
What is in sewage sludge? Sewage sludge is a byproduct of treated wastewater. It is composed of both organic and inorganic materials, a large concentration of plant nutrients, organic chemicals, as well as pathogens. Therefore, it is extremely important to properly treat such sludge in order to minimize its environmental repercussions. Here is a brief overview of the sludge treatment process to ...
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Performance comparison between a two-reactor cascade and a single tank in an activated sludge wastewater treatment process
We investigate a model for the treatment of wastewater in the activated sludge process. The process is based on the aeration of wastewater with flocculating biological growth, followed by the separation of treated wastewater from biological growth. The biochemical model consists of two types of bacteria: sludge bacteria and sewage bacteria; and two types of ciliated protozoa: free-swimming ...
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Recovery of reusable water from sewage using aerated flat-sheet membranes
Continuous developments and advances in membrane technology allow recovering to large extent reusable water from untraditional water sources, such as municipal effluents. In this paper, operational results and preliminary cost-analysis of a microfiltration (MF) process used for raw sewage and secondary effluent polishing are given. The research was conducted with a 22 sandwich-type flat-sheet ...
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Applications of the deep-shaft activated sludge process in wastewater treatment
The deep-shaft activated sludge process is a unique modification of the activated sludge system. The main objective of this system is to increase the amount of dissolved oxygen available for biological activity. This can be achieved by increasing the rate of oxygen transfer from the gas phase to the liquid phase. The deep-shaft configuration increases the partial pressure of oxygen, thereby ...
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Aqwise`s poster at the 2008 Weftec convention - Distribution of microbial population within a moving bed bio-film reactor (MBBR) combining a `denitrfiltration` unit
Introduction At high influent N levels , there is a need in Pre- and Post (Endogenous)-denitrification stages, requiring addition of an external electron donor. Systems based on the MBBR (Moving Bed Bio-film Reactor) process have high potential for treating domestic and industrial wastewater. Among process advantages: Elimination of sludge recirculation, Efficient ammonia and organic ...
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Fecal coliform removal in a sulfate reduction, autotrophic denitrification and nitrification integrated (SANI) process for saline sewage treatment
The Sulfate Reduction, Autotrophic Denitrification, Nitrification Integrated (SANI) process has been specially designed to treat saline wastewater. In the process no biological excess sludge is produced. SANI process also has the added advantages of cost and footprint reduction when compared to traditional activated sludge processes. In the SANI pilot plant, the fecal coliform removal efficiency ...
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Method for technical, economic and environmental assessment of advanced sludge processing routes
The legislative framework in force in Europe entails restrictive effluent standards for sensitive areas, and quite severe restrictions on the properties of residual sewage sludge, both for landfill disposal and for agricultural use. Several technologies and management strategies have been proposed and applied in wastewater treatment plants to minimise sludge production and contamination. ...
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Monitoring the variations of the oxygen transfer rate in a full scale membrane bioreactor using daily mass balances
Oxygen transfer in biological wastewater treatment processes with high sludge concentration, such as membrane bioreactor (MBR), is an important issue. The variation of α-factor versus mixed liquor suspended solids (MLSS) concentration was investigated in a full scale MBR plant under process conditions, using mass balances. Exhaustive data from the Supervisory Control And Data Acquisition (SCADA) ...
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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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Study of the sludge reduction in an oxic–settling–anaerobic activated sludge process based on UNITANK
An oxic–settling–anaerobic process (OSA) can effectively reduce sludge production, but most of the research studies on the OSA process have been either under laboratory test conditions or based on synthetic wastewater, which cannot fully reflect the performance and sludge reduction efficiency in existing OSA process. Thus, aiming at examining the sludge reduction efficiency and ...
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BM Respirometry benefits for activated sludge process management, research and training
A biological process controlled by non-biological measurements? All treatment plant efficiencies are geared to the waste that they receive. The microorganisms found in the waste need food and oxygen to survive, the food is provided as soluble organic carbon in the waste stream and the oxygen is obtained through the aeration process in the treatment plant. Once a treatment plant has been built, ...
By SURCIS, S.L.
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