sludge dewatering solids Articles

  • Metropolitan Sewer District (MSD), Cincinnati, Ohio U.S.A.: HTFB System

    The Metropolitan Sewer District (MSD) of Greater Cincinnati, Ohio is a 90 mgd primary treatment, 55 mgd activated sludge treatment plant. Solids processing includes gravity thickening of primary sludge, dissolved air flotation, thickening of secondary sludge, holding tank storage, belt filter press dewatering and pumping of cake to the old outdated multiple hearth ...

  • Škvorec WWTP in Czech Republic - Case Study

    Client's voice Since we had installed VOLUTE Dewatering Press in our waste water treatment plant I realized how much time we were wasting using dewatering bags. VOLUTE doesn´t need my presence and works fully automatically. I don´t sometimes even know that there is a dewatering unit in operation. Dewatering Data Sludge Type: Waste ...


    By AMCON Inc.

  • Impact of Polymer Type and Dose on the Fate and Survival of Fecal Coliform during Centrifuge Dewatering

    Recent studies reported significant increases in indicator bacteria counts in anaerobically digested sludge samples during and shortly after centrifugal dewatering. The reasons behind the observed increases are not yet well-understood. This study investigated the effect of centrifuge shear and polymer addition on the fecal coliform counts measured after centrifugation. Centrifuge shear and ...

  • Oil Field Sludge Dewatering

    An oil field contract dewatering company was unable to dewater the oily/water/solids from several oil field storage tanks using conventional coagulants/flocculants. The swings in solids loading and oil content made it very difficult to control the correct dosage rate as conventional chemistry has a very tight tolerance to maintain a dewaterable floc. The result was an ongoing blinding problem for ...


    By Integrated Engineers Inc.

  • Sludge Dewatering Performance - A Survey Of Real Operational Performance

    Abstract. A survey of the literature revealed that it is difficult, indeed virtually impossible, to get meaningful information about the likely performance of dewatering equipment. As a consequence customers have sometimes specified impossible target  performances and suppliers have unwisely agreed to them. Dewatering has major consequences for downstream processes, for example sizing dryers ...


    By Cambi Group AS

  • The effect of iron and aluminium for phosphorus removal on anaerobic digestion and organic sulfur generation

    The addition of iron or aluminium into activated sludge basins for phosphorus removal is likely to impact both the efficiency of the anaerobic digestion process and the generation of odor-causing compounds following digestion and dewatering. In this study, the impact of iron and aluminium addition on digestion and odor-causing compounds was investigated by using batch digestion of combined ...


    By IWA Publishing

  • Packaged Polymer Injection Dewatering System - Case Studies

    Case Study Number 1 Industry: Oil & Gas, Mining and Civil Waste Management Application: Treatment of Waste Drilling Fluids for Recycling Location: Brisbane, Australia Configuration: 20’ Explosion Proof HMI Dewatering System with VFD Driven EE-1448HD Centrifuge. Objective: Wastewater Treatment Sludge Dewatering in Order to Facilitate Landfill ...


    By Elgin Separation Solutions

  • Sludge treatment reed bed facilities – organic load and operation problems

    The dewatering of the sludge with loss on ignition between 50 and 65% will have a maximal drainage on the order of 0.008–0.020 L/s/m2. Dewatering of the sludge with loss of ignition higher than 65% of dry solids will have a maximal drainage on the order of only 0.001–0.004 L/s/m2, approximately five to 10 times lower. It can be seen that there is a tendency for the achievable dewatering result to ...


    By IWA Publishing

  • Using geotextile tubes for dewatering and beneficial use of high water content solid wastes: design charts and verifications

    The interest to push the beneficial use of high water content solid waste materials to a greater extent has increased tremendously. Using woven geotextile tubes as confinement and dewatering facilities for industrial, municipal sludges, and dredged materials offers various advantages to expand and enhance existing beneficial use strategies. To be successful, proper design of geotextile tubes is ...


    By Inderscience Publishers

  • Long-term performance of side-stream deammonification in a continuous flow granular-activated sludge process for nitrogen removal from high ammonium wastewater

    An innovative granular sludge deammonification system was incorporated into a conventional-activated sludge process. The process incorporated an internal baffle in the bioreactor for continuous separation of granular biomass from flocculent biomass, which allowed for controlling the solids retention time of flocculent sludge. The process was evaluated for ammonium removal from municipal digested ...


    By IWA Publishing

  • Investigation of Nitrification and Nitrogen Removal from Centrate in a Submerged Attached Growth Bioreactor

    The purpose of this study was to investigate the nitrification and nitrogen removal from centrate produced in the dewatering process of an anaerobically digested sludge, using a single-unit, single-zone submerged attached growth bioreactor (SAGB). The nitrogen loading varied from 0.54 - 1.51 kg-N/m3-day and the organic loading varied from 0.07 – 0.64 kg-bCOD/m3-day. The ...

  • A comparative perspective of US and UK thinking on e-coli reactivation in digestion and dewatering

    Since 2003 a number of WWTPs have observed elevation of E Coli densities following dewatering of digested sludge by high solids centrifuges, mainly in the US. A recent study by WERF shows that this applies to 4 out of 7 facilities studied in detail. A review of all the literature shows that the phenomenon occurs in 31 out of 33 facilities and includes those with thermophilic digestion or ...


    By Cambi Group AS

  • Woodstock WWTP Town of Woodstock, VA

    The Town of Woodstock was hauling liquid sludge to a regional plant which was having difficulty handling the high solids loading to their own plant. Woodstock needed of a temporary dewatering solution and decided to control their destiny by purchasing or renting dewatering equipment. With a growing town and an upcoming facility expansion, the plant had no building for equipment and decided that a ...


    By BDP Industries

  • Sustainable sludge handling for the 21st Century

    Purification of municipal and industrial waste waters leads to the generation of a residue-called “excess sludge”. This material when mechanically dewatered is typically 75-90% water. The balance of the dewatered sludge consists of organic compounds (solid waste, biomass) and inert materials (sand, salts, and metals). These sludges have been to date dehydrated to reduce the aqueous fraction using ...


    By SCFI Group Limited

  • Hazardous Oily Water Treatment Facility

    Wastewater Treatment Success Stories Hazardous Oily Industrial Waste Water Treatment The sample was received was at a pH of 6.8 and did not require any pH adjustment. 100 ml of the sample was tested and dosed with 0.4 ...


    By Integrated Engineers Inc.

  • Oil Field Water Treatment

    The IE Oil Field Treatment System (OFTS) offers a portable, yet high-quality, answer for oil well operators seeking to treat produce water from their drilling operations. The OFTS utilizes the extraordinary separation and dewatering characteristics of the FloccinAgent™ line of products, coupled with IE’s technical expertise and experience in wastewater treatment, to quickly and efficiently remove ...


    By Integrated Engineers Inc.

  • Confectionary and retort-packed food plant case study

    Cost reduction by using a proper polymer! This nationally-known factory, famous for confectionery and retort-packed food, dewaters its waste activated sludge with VOLUTE EC-202 model. They had used powder polymer manufactured by another manufacturer. However our staff realized the flock is in poor condition when he visited their factory. When you use a wrong polymer, polymer adding ...


    By AMCON Inc.

  • Accuracy and Cost Savings from Automatic Optimization of Dewatering

    Improvements in sensor and automation technology in recent years have made it possible to design a system to control the key variable parameters in and around the dewatering process. By continuously analyzing feed conditions and output from the process, an automated optimization system can make necessary proactive adjustments to the internal settings of the dewatering equipment, the polymer ...

  • A review on sludge dewatering indices

    Dewatering of sludge from sewage treatment plants is proving to be a significant challenge due to the large amounts of residual sludges generated annually. In recent years, research and development have focused on improving the dewatering process in order to reduce subsequent costs of sludge management and transport. To achieve this goal, it is necessary to establish reliable indices that ...


    By IWA Publishing

  • Nitrification of centrate from dewatering of anaerobically digested sludge

    Nitrification of anaerobically digested sludge centrate was studied in bench-scale suspended growth and fixed film enhanced suspended growth systems at temperatures of 10.5-28.5°C and pH values of 6.0-9.1. Nitrification followed zero-order kinetics in both systems, and ammonia removals in excess of 99% were observed. The temperature dependency of the suspended growth nitrification rate ...


    By Inderscience Publishers

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