wastewater sludge Articles

  • Industrial Sludge Wastewater Treatment

    Industrial Sludge Wastewater Treatment Industrial Sludge Treatment Facility Oxygen Mixing Injection Dissolved Oxygen Boosted with Liquid Oxygen to Improve Bacteriological ...


    By Integrated Engineers Inc.

  • Pollutants in Urban Wastewater and Sewage Sludge

    Untitled Document Executive Summary Water policy in the European Union is aiming to promote sustainable water use and a major ...

  • 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

  • Eliminating sludge islands in your wastewater lagoon

    Old municipal and industrial wastewater lagoons have the tendency to build islands of sludge at various locations around the lagoon. It is most common for older lagoons to build such islands wherever wastewater enters the lagoons. Of course, this is because the solids entering the lagoon have enough weight to fall out of the water as flow velocity is reduced, so the solids pile up just after ...


    By Reliant Water Technologies

  • 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

  • Sludge Reduction: Technologies Integrated in the Wastewater Handling Units

    Addition of chemical metabolic uncouplers The process of uncoupled metabolism has been studied since the ’90s for the reduction of sludge production. It can be obtained by using chemical metabolic uncouplers such as chlorinated and nitrated phenols, or 3,3’,4’,5-tetrachlorosalicylanilide (TCS). ...


    By IWA Publishing

  • 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 ...

  • Decrease in Sludge and Wastewater: Nowra Chemical Manufacturers

     Table of Contents Executive Summary 1. Review of Nowra Chemicals Operations 2. Planning and ...


  • Toluene in sewage and sludge in wastewater treatment plants

    Toluene is a compound that often occurs in municipal wastewater ranging from detectable levels up to 237 μg/L. Before the year 2000, the presence of the aromatic hydrocarbons was assigned only to external sources. The Enhanced Biological Nutrients Removal Processes (EBNRP) work according to many different schemes and technologies. For high-efficiency biological denitrification and ...


    By IWA Publishing

  • Reuse of treated wastewater and sewage sludge for fertilization and irrigation

    The objective of the present work was to assess the short term potential of treated wastewater and sewage sludge for ornamental lawn fertilization and irrigation. A field experiment was performed and the following treatments were considered: sewage sludge application + irrigation with public water; sewage sludge application + irrigation with treated wastewater; irrigation with public water; ...


    By IWA Publishing

  • New processes for the improvement of sludge digestion and sludge dewatering

    INTRODUCTIONThe examination of numerous sewage sludges from municipal wastewater treatment plants leads to the conclusion that on the one hand dewaterability of these sludges worsens and that on the other hand dewaterability of sludges becomes more and more important due to increasing disposal costs. Especially wastewater treatment plants with inflows from the food processing industry often face ...


    By Cambi Group AS

  • 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 ...


    By IWA Publishing

  • Rethinking wastewater characterisation methods for activated sludge systems – a position paper

    Increasingly stringent effluent limits and an expanding scope of model system boundaries beyond activated sludge has led to new modelling objectives and consequently to new and often more detailed modelling concepts. Nearly three decades after the publication of Activated Sludge Model No1 (ASM1), the authors believe it is time to re-evaluate wastewater characterisation procedures and targets. ...


    By IWA Publishing

  • Analysis of sludge aggregates produced during electrocoagulation of model wastewater

    This paper presents the results of the study of sludge aggregates produced during electrocoagulation of model wastewater of a composition corresponding to the effluents from the cellulose and paper industry. Wastewater was electrocoagulated statically using aluminium electrodes with a current density of 31.25 A m−2 and 62.50 A m−2. In subsequent stages of the treatment, sludge flocs were ...


    By IWA Publishing

  • Acid dye removal from industrial wastewater by adsorption on treated sewage sludge

    This study investigated the suitability of sewage sludge for the removal of Acid Blue 93 industrial wastewater. Washed sewage sludge (WS) and sludge activated carbon (AS) were used as adsorbents. The effect of pH, contact time, adsorbent dose and adsorption temperature was studied. Equilibrium isotherms for the adsorption were analysed by Freundlich and Langmuir isotherm models. The ...


    By Inderscience Publishers

  • Continuous flow aerobic granular sludge reactor for dairy wastewater treatment

    The focus of this study was to assess the treatment performance and granule progression over time within a continuous flow reactor. A continuous flow airlift reactor was seeded with aerobic granules from a laboratory scale sequencing batch reactor (SBR) and fed with dairy wastewater. Stereomicroscopic investigations showed that the granules maintained their integrity during the experimental ...


    By IWA Publishing

  • 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

  • Energy recovery from thermal treatment of dewatered sludge in wastewater treatment plants

    Sewage sludge is a by-product generated from municipal wastewater treatment (WWT) processes. This study examines the conversion of sludge via energy recovery from gasification/combustion for thermal treatment of dewatered sludge. The present analysis is based on a chemical equilibrium model of thermal conversion of previously dewatered sludge with moisture content of 60–80%. Prior to ...


    By IWA Publishing

  • Efficient nitrogen removal for wastewater in compartmentalised activated sludge process

    Studies were conducted on two aerobic-anaerobic configurations of the activated sludge process for nitrogen removal from domestic wastewater. An initial anaerobic stage followed by aerobic, anaerobic and aerobic stages provided best total Kjeldahl nitrogen removal. This profile was selected for conducting further experiments on the effect on nitrogen removal of the hydraulic loading and the food ...


    By Inderscience Publishers

  • Fast and reliable analysis of wastewater and sludges with a scanning array ICP emission spectrometer

    Wastewater and sludge analyses generally require the determination of many elements and are economically performed using ICP-OES, due to the speed and robustness of this technique. Several ICP-OES methods are available for this determination including EPA method 200.7 (1). In the USA, DIN 38 406 E22 (2) in Germany, or ISO 11885 (3) on a global scale. For this type of application, the ...


    By PerkinElmer, Inc.

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