activated sludge technology Articles

  • Cyclic activated sludge technology

    Cyclic activated sludge technology was selected for the Potsdam Wastewater Treatment Plant (90,000 p.e.). The cyclic activated sludge facility comprises four modules integrated into two circular basins. Construction was commenced in February 1998 with seeding of the plant for start up taking place in October 1998. Process performance has been met since Spring 1999 at 80-90 ...


    By Water Experts Germany

  • Anaerobic Biomass Activity Tests

    Anaerobic Biomass Activity Tests The methane production activity of anaerobic sludges is related to the history of the sludge, the biomass yield from the wastewater the sludge has been treating, the fraction of methanogens, and the presence of toxic substances. Best performance can be achieved from an anaerobic treatment plant if the operator measures the Specific Methanogenic Production (SMP) ...


    By Challenge Technology

  • Membrane fouling mitigation by activated carbon addition in activated sludge filtration

    Activated carbon (AC) was added into the activated sludge to alleviate membrane fouling during sludge microfiltration. The fouling mitigation profiles were evaluated at different AC sizes and doses by a single-fibre microfiltration system. It was found that the granular AC added in the sludge suspension can absorb the organic substances in the sludge in a certain level, including biopolymer ...


    By Inderscience Publishers

  • Sludge Minimization Technologies-Doing More to Get Less

    Sludge minimization technologies have been available for several decades; however recent developments have brought some sludge minimization technologies to the forefront. All of the technologies utilize one or more of three basic approaches to minimize the amount of waste activated sludge produced by an activated sludge process: cell lysis, cyclic oxic environments, and long solids retention ...

  • Increase in sewage treatment performance with ENEXIO 2H BIOdek®-IFAS fills for activated sludge basins

    Increase in output of up to 35 % in activated sludge basins Simple retrofitting during operation See 2H technology this year at IFAT in Munich The use of fills from ENEXIO Water Technologies GmbH (formerly GEA 2H Water Technologies) can increase the output of activated sludge basin by up to 35 %. ENEXIO 2H BIOdek® IFAS fills are designed for installation ...

  • Sludge Treatment and Disposal Technologies

    Most wastewater treatment processes produce a by-product that purifies wastewater before it is released into local waterways. This by-product is named as sludge. Typically in solid, semi-solid or liquid state, it is in fact an amalgamation of all the liquid wastes that are discharged by domestic houses, commercial properties, industry, and/or agriculture after aerobic biological treatment. ...


    By IWA Publishing

  • Trends in biosolids handling technologies: economics and environmental factors

    Changes in activated sludge technology, with a much greater focus on nutrient removal instead of removal of organics, together with relatively long sludge mean that the primary sludge stream has been lost, and the sludge produced is less degradable. At the same time with the growing importance of sustainable solutions, beneficial agricultural use is being increasingly used. This changes quality ...


    By Cambi Group AS

  • Lumpur Aktif (Activated Sludge)

    Lumpur aktif (activated sludge) merupakan campuran cair atau semicair dan partikel endapan lumpur dan tanah liat salah satu proses pengolahan air limbah secara biologi, proses pertumbuhan organisme yang berukuran sangat kecil yang biasa disebut mikroba tersuspensi dimana proses tersebut pada ...


    By Grinviro Biotekno Indonesia

  • 7 Disadvantages of Implementing an Activated Sludge Process For Your Municipality or Company

    Biological treatment processes are an important component in many wastewater treatment systems. They are one of the most efficient and effective ways of reducing organic material in wastewater. There are quite a few of them that have been researched and used over several decades. However, one of the most widely used conventional biological treatment process is the activated sludge process (ASP). ...

  • Application of vibration milling for advanced wastewater treatment and excess sludge reduction

    As a new sludge reduction technology with a phosphorus removal mechanism, a vibration milling technology that uses iron balls have been applied to the wastewater treatment process. Three anaerobic–aerobic cyclic activated sludge processes: one without sludge disintegration; one disintegrated sludge by ozonation; and the other disintegrated sludge with the vibrating ball mill were compared. ...


    By IWA Publishing

  • Questions and Answers About Integrated Fixed-Film/Activated Sludge (IFAS) in a BNR Pilot Plant

    Integrated Fixed-film/Activated Sludge (IFAS) is an increasingly popular technology that promises to greatly improve the performance of activated sludge wastewater treatment systems.  However, many questions remain about the fundamental behaviors and performance of these hybrid systems. Their future development will require a better understanding of the biokinetic behaviors and distribution of ...

  • Influence of nanoparticles on the polymer-conditioned dewatering of wastewater sludges

    The effect of using small-scale, high surface area, nanoparticles to supplement polymer-conditioned wastewater sludge dewatering was investigated. Aerobically digested sludge and waste activated sludge sourced from the Hunter Valley, NSW, Australia, were tested with titanium dioxide nanoparticles. The sludge samples were dosed with the nanoparticles in an attempt to adsorb a component of the ...


    By IWA Publishing

  • Determination of design criteria of an h-ifas reactor in comparison with an extended aeration activated sludge process

    The activated sludge process is a suspended culture system that has been in use since the early 1900s. The process derives its name from the fact that settled sludge containing living, or active, microorganisms is returned to the reactor to increase the available biomass and speed up the reactions. It may be either a completely mixed or plug flow process. The process is aerobic, with oxygen being ...


    By University of Tehran

  • Alternatives for energy production in aerobic wastewater treatment facilities

    Using technologies such as anaerobic digestion for energy generation from wastewater demands a change in infrastructure that several treatment works are not prepared to immediately implement. This works explores the use of energy production technologies to increase the sustainability of conventional aerobic wastewater treatment plants. The first option considered sludge (a by-product from ...


    By IWA Publishing

  • Integrated side-stream reactor for biological nutrient removal and minimization of sludge production

    Integrated processes to reduce in situ the sludge production in wastewater treatment plants are gaining attention in order to facilitate excess sludge management. In contrast to post-treatments, such as anaerobic digestion which is placed between the activated sludge system and dewatering processes, integrated technologies are placed in the sludge return line. This study evaluates the ...


    By IWA Publishing

  • Fixed activated sludge treatment (FAST®) process technology overview

    Biological treatment systems for small communities and even single-family dwellings have been available in the general water pollution control market for many years. These systems are basically scaled-down versions of the activated sludge process, utilizing suspended growth systems. Historically, the main operational problem associated with these systems has been the management of the sludge ...


    By BioMicrobics, Inc.

  • 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

  • Biosolids Minimization using Integrated Alkaline Sludge Hydrolysis and Biological Nutrient Removal Process

     ABSTRACT This paper presents a pilot-scale evaluation of an integrated approach to sludge management utilizing a combination of biological nutrient removal and biosolids alkaline hydrolysis, as well as attempts to explore the impact of recycled alkaline hydrolysates on sludge yield and anaerobic digestion. The novel concept of converting an existing conventional activated sludge (CAS) ...

  • 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 ...


    By Inderscience Publishers

  • When Is IFAS The Right Choice?

    The Integrated Fixed Film Activated Sludge (IFAS) technology is gaining popularity in the United States as an alternative strategy for upgrading and expanding municipal wastewater treatment facilities. A number of full-scale IFAS plants are now in operation in the United States, which have demonstrated the technical capability and reliability of the process. The question now being asked by ...

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