waste sludge treatment Articles

  • Effect of synthetic cationic surfactants on dewaterability and settleability of activated sludge

    Dimeric cationic surfactants with different lengths of carbon chains were synthesised, and then these surfactants were added to the activated sludge samples to evaluate the dewaterability and settleability. The adsorbability of cationic surfactants on activated sludge was also studied. By comparing the dewatering performances of different cationic surfactants, the effect mechanisms of cationic ...


    By Inderscience Publishers

  • Turning biological waste treatment plant sludge into a fuel source

    North Carolina, as part of its landfill regulations, banned all waste treatment plant sludges from general landfills in March, 1989. Cranston Print Works Company was producing approximately 20 tons per day of 18% solid non-hazardous sludge in its extended aeration activated sludge waste treatment plant. Sludge disposal costs were $10,000 per week after the ban took effect. This paper traces the ...


    By Komline-Sanderson

  • Ultrasonic Waste and Sludge Treatment

    Biogas is generated from sources, such as municipal organic waste, sewage sludge, muck or manure. Ultrasonication improves the digestibility of such organic material leading to more biogas and less residual sludge. Biogas is a byproduct of the decomposition of organic matter by anaerobic or aerobic bacteria. It consists primarily of methane, carbon dioxide and hydrogen sulfide. This makes biogas ...


    By Hielscher Ultrasonics GmbH

  • Case study - Florida, USA – advanced sequencing batch reactor

    300,000 gpd ASBR facility replaced the existing concrete and steel conventional extended aeration activated sludge treatment, settlement clarifiers, and aerobic sludge digestors. Receives wastewater collected from 14 neighborhoods, residential housing, nursing homes and hospital facilities on a 425 acre site. Wastewater treatment comprises flow metering,  fine screening ...

  • Florida, USA - Advanced Sequencing Batch Reactor - Case Study

    300,000 gpd ASBR facility replaced the existing concrete and steel conventional extended aeration activated sludge treatment, settlement clarifiers, and aerobic sludge digestors. Receives wastewater collected from 14 neighborhoods, residential housing, nursing homes and hospital facilities on a 425 acre site. Wastewater treatment comprises flow metering,  fine screening ...

  • Neptune project deliverable D4.1

    Assessment of environmental sustainability and best practice The main objectives of NEPTUNE WP4 include: Complementation of state-of-the-art life cycle assessment (LCA) tcover specific biological effects (e.g. endocrine disruption) of micropollutants and pathogens. Applying the LCA methodology on a variety of wastewater and sludge technologies in order tassess the environmental ...


    By IWA Publishing

  • An analysis of the environmental management elements related to the improvements of the drying kinetics of waste activated sludge by Fenton peroxidation

    Advanced sludge treatment processes (AST) reduce the amount of sludge produced and improve the dewaterability, thus probably also affecting the heat transfer properties and the drying characteristics of the sludge. This paper studies the influence of the Fenton peroxidation on the thermal conductivity of the sludge. Results demonstrate that the Fenton's peroxidation improves the sludge cake ...


    By Inderscience Publishers

  • Recycled fertilizer from Struvite and Ashes - Case Study

    Fertilizers based on sewage sludge ash, bone meal ash and struvite The goal of ICL Fertilizers is to replace the use of limited phosphate rock from mines with phosphate from ashes of sewage sludge, meat and bone meal, wood and ...


    By Nutrient Platform

  • Experimental power of laboratory-scale results and transferability to full-scale anaerobic digestion

    Anaerobic digestion is today internationally acknowledged as an environmentally sound process for energy and nutrient recovery from organic wastes, and it is the dominant sludge treatment technology in most countries’ wastewater treatment plants. Laboratory- or pilot-scale experiments are commonly used as a first step to investigate the potential of new ideas or to confirm research hypothesis ...


    By IWA Publishing

  • Anaerobic digestion of Organic Fraction of Municipal Solid Waste (OFMSW) in two-phase system

    In view of recovering energy resource from the treatment of Organic Fraction of Municipal Solid Waste (OFMSW), anaerobic digestion of OFMSW prior to aerobic composting as post-treatment was considered. This study aimed to determine the operational characteristics and efficiency of a two-phase system composed of a fed-batch hydrolysis reactor (phase I) and a methanogenic Upflow Anaerobic Sludge ...


    By Inderscience Publishers

  • Removal of endosulfan using aerobic mixed bacterial culture

    With the increasing use of pesticides in modern agriculture, increased evidence of their disastrous effects on the environment has been noticed. Pesticides applied in various modes and places contaminate various parts of the environment, including groundwater sources. As pesticide problems are greater in the rural areas, the authors have developed a successful low-cost technology for rural areas ...


    By Inderscience Publishers

  • Fluxes of 13 selected pharmaceuticals in the water cycle of Stockholm, Sweden

    Mass flows of 13 pharmaceutical active ingredients (APIs) found in drinking water were studied in the water cycle of Stockholm. Data were collected by analyzing samples of surface water, raw water and drinking water as well as influents, effluents and sludges from waste water treatment plants (WWTPs) in Stockholm area. A mass balance was performed, based on sold amounts of pharmaceuticals and the ...


    By IWA Publishing

  • Trials at a sewage treatment plant in Moscow Case Study

    At Moscow WWTPs (Kuryanovsky and Luberetsky) ,each having water capacity of 2,5 mln m3/day, all mixture of primary and secondary sludge is digested at 53 °C with SRT=HRT 7 days. The volatile solid reduction (VSR) is about 43-46% and gas production is about 0.33 m3/kg VS fed. In order to increase VSR and gas production many different optimization variants were studied. One of them was ...


    By Weber Entec GmbH & Co. KG

  • Successful NRW Reduction Experience in China

    Sino French Water is a company created in 1992 between Suez Environnement of France and NWS Holdings Limited of Hong Kong. Sino French Water invests and establishes joint-ventures (JVs) with local water authorities and companies in China to improve the management and operation of water, waste water, industrial water services and sludge treatment. Today there are more than 25 JVs spread all over ...


    By IWA Publishing

  • Waste activated sludge reduction using sonication and cryptic growth

    The management of excess activated sludge imposes great cost on wastewater treatment plants and represents significant technical challenges. This paper investigates a new technology, sonication and cryptic growth, to reduce the amount of excess sludge from the wastewater treatment system. Subsequent Biological Reactors (SBRs) were used for the study. The results show that the amount of excess ...


    By Inderscience Publishers

  • Development of a novel epigeic-anecic-based polyculture vermireactor for efficient treatment of municipal sewage water sludge

    The potential of vermireactors, based on polyculture and monoculture system, was evaluated by using substrate consisted of domestic sewage sludge mixed with sugarcane trash, under laboratory conditions. Polyculture reactor was designed by using an epigeic (Eisenia fetida) and an anecic (Lampito mauritii) species of earthworm, while monoculture reactor had E. fetida only. Comparatively the end ...


    By Inderscience Publishers

  • Impact of microwave treatment on properties of waste activated sludge

    The impact of changing microwave (MW) operational parameters such as temperature, intensity, contact time, and sludge concentration on the physic–chemical and microbiological properties of waste activated sludge (WAS), as well as on biogas production have been investigated. Results obtained indicated that sludge solubility increases with the increase of MW contact time and temperature. At an ...


    By Inderscience Publishers

  • Sustainable odour control in urban environments

    Abstract With an ever increasing focus on sustainability, the municipal recycling sector is increasingly locating recycling facilities in urban environments to be closer to their waste sources. The odour control industry needs to respond in providing ever more efficient odour extraction technologies to minimise any odour nuisance to their residential community neighbours. ...

  • Dazed and Confused: Alternative fuels and the CISWI definitions rule

    As discussed in ALL4’s December 2008 issue of 4 The Record, the use of alternative and non-traditional fuels for heat and power generation is on the rise, an increase that can be attributed to the price surge and volatility of traditional fossil fuels, as well as to a general desire to use more environmentally friendly materials to reduce greenhouse gas emissions. Alternative fuels have been ...


    By All4 Inc.

  • Anaerobic Processes as the Core Technology for Sustainable Domestic Wastewater Treatment: Consolidated Applications, New Trends, Perspectives, and Challenges

    Anaerobic digesters have been responsible for the removal of large fraction of organic matter (mineralization of waste sludge) in conventional aerobic sewage treatment plants since the early years of domestic sewage treatment (DST).  Attention on the anaerobic technology for improving the sustainability of sewage treatment has been paid mainly after the energy crisis in the 1970s. The successful ...


    By Springer-Verlag GmbH

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