sludge removal Articles

  • Removal of hydrogen sulphide on sewage sludge/industrial sludge based carbonaceous adsorbents

    The adsorbents were prepared for sewage sludge, waste oil sludge and metal oil sludge. On the materials obtained dynamic adsorption of H2S was measured. The initial and exhausted adsorbents were characterised using sorption of nitrogen, thermal analysis, and XRF, XRD and surface pH measurements. The adsorbents have high capacity for H2S (10% wt) The high volume of mesopores contributes ...


    By Inderscience Publishers

  • The role and control of sludge age in biological nutrient removal activated sludge systems

    The sludge age is the most fundamental and important parameter in the design, operation and control of biological nutrient removal (BNR) activated sludge (AS) systems. Generally, the better the effluent and waste sludge quality required from the system, the longer the sludge age, the larger the biological reactor and the more wastewater characteristics need to be known. Controlling the reactor ...


    By IWA Publishing

  • Comparing Sludge Removal Systems For Water Treatment Plants

    Due to limited clearance and accessibility, effective removal of settled sludge beneath tube settlers has long been a challenge for plant owners and design engineers. They needed a sludge removal solution with a low-profile design that would offer flexibility during operation and maintenance. In 2012, Brentwood introduced a new sludge removal system to fill those needs ─  ...


    By Brentwood Industries, Inc.

  • The Removal of Alkylphenol Ethoxylate Surfactants in Activated Sludge Systems

    US EPA has finalized federal Water Quality Criteria for nonylphenol, a biodegradation intermediate of nonylphenol ethoxylates, which are commonly used surfactants. To provide information in support of this initiative, an assessment was made of the ability of wastewater treatment plants to remove these and other alkylphenol ethoxylate (APEO) surfactants that are used widely in domestic and ...

  • Behaviour and adsorptive removal of siloxanes in sewage sludge biogas

    We investigated the behaviour of siloxanes, which adversely affect biogas engines, as well as their concentration levels in sewage sludge biogas in Japan. We also performed experiments on the absorptive removal of siloxanes using various adsorbents and determined the main adsorbent characteristics required for the removal of siloxanes. The results of our study on the concentration and composition ...


    By IWA Publishing

  • Removal of heavy metals from samples of residual sludge

    Nitric acid leaching processes were evaluated for removal of heavy metals from samples of residual sludge from an industrial and municipal wastewater plant. The study showed that an acid:water ratio of 1:1 and a nitric acid concentration of 2 mol 1−1 gave efficient removal of 86.7%, 100% and 100% of copper, nickel and arsenic.Keywords: heavy metals, nitric acid leaching, ...


    By Inderscience Publishers

  • Removal of inorganics from sludge and digestate: the BiAR process

    This conference contribution will present a novel technology for renewable ash-free fuel production from low-value ash-containing feedstocks such as sludge digestate, wood bark or rice husks that cannot be utilized directly as a heating fuel, because of the high (low melting point) ash content. Biomass Ash Removal (BiAR) process introduces the low-temperature solvolysis in cheap solvents to ...


    By IWA Publishing

  • Cadmium ion removal by electroflotation onto sewage sludge biomass

    Non–living, anaerobically digested, Activated–Sludge (AS) was examined (laboratory–scale experiments) as possible biosorbent for the removal of cadmium from dilute aqueous solutions. The application of electroflotation to the suspended biomass, was investigated in this paper as an effective solid/liquid separation technique for the metal–loaded biosorbent particles. The main parameters ...


    By Inderscience Publishers

  • 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

  • Methylene blue removal by carbonized textile sludge-based adsorbent

    Colored effluent and a large amount of sludge are major pollutant sources derived from textile industry activity. In this research, the idea for converting textile sludge into a potential adsorbent was conducted through a carbonization process in order to solve the colored effluent problem. Textile sludge was carbonized at a temperature ranging from 400 to 800 °C in the absence of oxygen. ...


    By IWA Publishing

  • Removal of sludge deposits from the floor of a lagoon case study

    Massive fat oil and grease sludge deposits on the floor of the lagoon were contaminating the lagoon in the following pictures. The depth of these deposits was such that they were protruding through the surface of the water. The customer required their removal. The surface aerator installed for the purposes of mixing and oxygenation can be seen in the picture. In order to deal with these deposits ...


    By Bio Systems Europe

  • Impact of activated sludge process configuration on removal of micropollutants and estrogenicity

    The efficacy of three different wastewater treatment configurations, conventional activated sludge (CAS), nitrifying activated sludge (NAS) and biological nutrient removal (BNR) for removal of selected micropollutants from authentic wastewater was investigated. The processes were also characterized based on their proficiency to reduce the estrogenic activity of the influent wastewater using the ...


    By IWA Publishing

  • Training: How to Remove Lagoon Sludge and Improve WWTP Outcomes

    What should you do when your town is under multiple and ongoing consent orders for violations of its Montana Pollutant Discharge Elimination System (MPDES) wastewater discharge permit? Excessive lagoon sludge accumulation contributes to the poor performance of any treatment system, particularly in winter. Removing sludge from the lagoon cells will improve treatment at the facility and ...


    By SRS Crisafulli, Inc.

  • Using excess sludge as carbon source for enhanced nitrogen removal and sludge reduction with hydrolysis technology

    In order to improve the nitrogen removal efficiency and to achieve the sludge reduction in traditional wastewater treatment plants, a combined hydrolysis-anoxic-oxic (H-A-O) pilot-scaled reactor was used in this study to investigate the possibility and validity of using excess activated sludge (EAS) fermentation liquids to enhance the nitrogen removal. The results clearly showed that sludge ...


    By IWA Publishing

  • Removal effect of Cr (VI) by adsorbent made from sewage sludge

    Adsorbent made from sewage sludge is used to remove the Cr (VI) in wastewater. In this paper, the adsorption capacity, adsorption mechanism and regeneration of the adsorbent are studied. A systematic research is carried out to investigate the influence of adsorption capacities in various conditions, such as contact time, pH and initial dosage of adsorbent. The results show that: the equilibrium ...


    By IWA Publishing

  • Modeling the pH effects on nitrogen removal in the anammox-enriched granular sludge

    The aim of the study was to determine the pH effects on nitrogen removal in the anammox-enriched granular sludge. The experimental data were extracted from a 4 L completely-mixed batch reactor with the granular sludge at different initial pH values (6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5) and constant temperature T = 30 °C. Simulations were run in GPS-X 6.4 using a comprehensive mechanistic ...


    By IWA Publishing

  • Aerobic granular sludge technology and nitrogen removal for domestic wastewater treatment

    This study evaluated aerobic granulation and nitrogen removal via assimilation, nitrification, and denitrification of a system fed with real domestic wastewater. The granulation process was complete after 160 days of operation. The mature granules had an almost spherical structure, an average size of 473.0 μm, and a good settling ability (SVI30 of 75.6 mL g−1). Ammonium ...


    By IWA Publishing

  • Surface active solutions tank cleaning & crude oil sludge removal

    For over ten years Surface Active Solutions has led the way in developing integrated microemulsion solutions for tank cleaning operations, crude oil sludge treatment and slops treatment. The company, with offices in Houston and Grangemouth (Scotland) aims to create real synergy in its approach to tank cleaning by combining its microemulsion chemistries with automated tank cleaning systems. The ...

  • 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

  • A comparison of biodegradation kinetic models applied to estrogen removal with nitrifying activated sludge

    The biological degradation of estrone (E1), estradiol (E2) and ethinylestradiol (EE2) was studied in batch experiments at typical concentration levels using nitrifying activated sludge from a membrane bioreactor (MBR). Since first-order, pseudo first-order and Monod-type kinetics were observed. Pseudo first order kinetic was reformulated using only the soluble concentrations S and assuming ...


    By IWA Publishing

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