sludge drying process Articles

  • Investigation of the effects of temperature and sludge characteristics on odors and VOC emissions during the drying process of sewage sludge

    Sludge drying is a necessary step for sludge disposal. In this study, sludge was collected from two wastewater treatment plants, and dried at different temperatures in the laboratory. The emission of odor and total volatile organic compounds (TVOCs) during the sludge drying process were determined by an online odor monitoring system. The volatile organic compounds (VOCs) in off-gas were analyzed ...


    By IWA Publishing

  • Sludge Drying Overview - Treatment Methods and Applications

    Sludge is a residual, semi-solid by-product left from industrial or refining processes. It is a separated solid suspended in a liquid, typically containing major quantities of interstitial water between its solid particles.  This material can be dried to cut its volume and reduce most of the moisture content of the biosolids present in the sludge. ...


    By IWA Publishing

  • High dry solids digestion

    ABSTRACTDigestion of sewage sludge normally takes place at pH values between 7,0 and 7,5. Control methods of the process stability are based on practical experience such as the ratio of volatile fatty acids (VFA) and total alkalinity (TA). Thermal sludge disintegration for an enhanced digestion process allows a digester feed with higher dry solids concentrations. This is due to an opening of ...


    By Cambi Group AS

  • High dry solids digestion

    Abstract Digestion of sewage sludge normally takes place at pH values between 7,0 and 7,5. Control methods of the process stability are based on practical experience such as the ratio of volatile fatty acids (VFA) and total alkalinity (TA). Thermal sludge disintegration for an enhanced digestion process allows a digester feed with higher dry solids concentrations. This is due to an ...


    By Cambi Group AS

  • Sludge Production

    Specific sludge production in wastewater treatment varies widely from 35 to 85 g dry solids per population equivalent per day (gTS PE-1 d-1). The production of primary sludge is related to the amount of settleable solids in raw wastewater whose solids content is typically of 50-60 gTSS PE-1 d-1 or 110-170 ...


    By IWA Publishing

  • Solidification / Immobilisation of sludge from physical-chemical WWT process

    In 2003 econ received an inquiry from a service company operating an industrial waste water treatment plant. At the end of the physical-chemical WWT process this client generated metal-hydroxide sludge from his chamber filter presses. Originally he discharged the sludge into skips and brought it to a hazardous waste landfill. At this landfill, a solidification process was used to stabilise ...

  • Pre-ozonation in the activated sludge process: fate of nitrogen species

    The objective of this research was to include ozonation prior to an activated sludge treatment and investigate the effect on the nitrogen species, their fate and the consequences of this oxidation upon the biomass. Three parallel treatment systems were used: the base system, where feed went directly to the activated sludge reactor, and two others, where the influent was ozonated at two different ...


    By IWA Publishing

  • 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 ...


    By Reliant Water Technologies

  • The thin-layer drying characteristics of sewage sludge by the appropriate foaming pretreatment

    As dewatered sludge is highly viscous and sticky, the combination of foaming pretreatment and drying process seems to be an alternative method to improve the drying performance of dewatered sludge. In this study, CaO addition followed by mechanical whipping was employed for foaming the dewatered sludge. It was found that the foams were stable and the diameters of bubbles mainly ranged from 0.1 ...


    By IWA Publishing

  • Belgian egg processing

    Between 3 and 4 million eggs are broken daily, 5 days a week, to produce egg-white, egg-yolk, and some mixed egg products for a total of 900 - 1000 tons of end-products per week. All is done under the highest hygienic standards. The wastewater treatment plant was built 10 years ago, when the egg breaking capacity was at 1.5 million eggs per day and was engineered for handling an expansion up to 3 ...


    By BluePlanet Labs

  • Simulation of sludge dewatering on belt filters

    A mathematical model for belt filters was developed to determine optimum load rate and belt speed during drainage of flocculated biological sludge. Numerical simulations were performed for belt filters with and without plows, and the model fit experimental data well. Experiments showed that highly compressible cakes were formed during drainage, which was important. Due to cake compression, the ...


    By IWA Publishing

  • Advanced Dewatering & Drying System – A Performance Model

    Since the beginning of 2006, an advanced dewatering and drying system has been operating in the United Kingdom. The facility is producing greater than 40 dry metric tonnes per day of enhanced biosolids in accordance with European Union regulations. The facility is producing biosolids with pathogen levels near minimum detectable levels. This is being achieved with an energy usage less than the ...

  • Biosolids- Considering the Types, Applications and Biosolids Drying Methods

    While some water treatment plants are meant to simply make the sludge safe enough to dispose of, most facilities continue to treat the sludge so that the material can be put to good use in their communities. Once sludge is treated and processed to meet EPA safety standards for productive use, the resulting nutrient-rich organic material is termed as biosolids. ...


    By IWA Publishing

  • Manitou Drive Biosolids Drying Facility - Case Study

    About the Project The WWTP is a conventional activated sludge process with chemical phosphorus removal, anaerobic sludge digestion and sodium hypochlorite disinfection, and has a rated design capacity of 123 million litres/day (MLD). The treated effluent is discharged to the Grand ...


    By Biorem Technologies Inc.

  • An Advanced Biosolids Treatment Process and Potential Beneficial Applications of the Processed Biosolids

    ABSTRACTAn innovative and cost-effective biosolids treatment and processing technology was developed and demonstrated at a pilot and full-scale at the Guelph Wastewater Treatment Plant in Ontario. The Lystek process involves a low but optimized application of heat, alkali, and mixing in a batch or semi-continuous system to achieve the desired physical, chemical and microbiological characteristics ...

  • Verification of an alternative sludge treatment process for pathogen reduction at two wastewater treatment plants in Victoria, Australia

    At South East Water wastewater treatment plants (WwTPs) in Victoria, Australia, biosolids are stockpiled for three years in compliance with the State guidelines to achieve the highest pathogen reduction grade (T1), suitable for unrestricted use in agriculture and landscaping. However, extended stockpiling is costly, may increase odour nuisance and greenhouse gas emissions, and reduces the ...


    By IWA Publishing

  • Processing technology for radioactive wastes

    For 20 years now, AVA has been delivering innovative mixers, dryers, and systems for environmental and processing technologies. The treatment of highly contaminated materials has always been one of our core competencies. For more than 10 years, AVA Technology has been applied for the processing of radioactive wastes. The application of AVA mixers and reactors may be divided into two main ...


    By AVA GmbH u. Co. KG

  • Full-Scale Experience with the Sharon Process through the Eyes of the Operators

    ABSTRACTThis paper summarizes different operating aspects and experiences of several SHARON plants. The SHARON process is suitable for treatment of high strength ammonia wastewaters such as reject water from dewatering of digested sewage sludge and wastewater from sludge drying or incineration plants. The aerated retention time and nitrite concentration are the two most important process ...

  • 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 ...


    By Inderscience Publishers

  • Environmental assessment of different dewatering and drying methods on the basis of life cycle assessment

    Sewage sludge is an inevitable product of wastewater treatment in municipal wastewater plants and its amount has increased dramatically due to the growing number of sewage systems users. This sludge needs to be adequately treated in order to decrease its hazardous properties and any negative influence on the environment. In this paper, gate to gate analysis, on the basis of life cycle assessment ...


    By IWA Publishing

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