sludge processing Articles

  • New dimensiong guideline and standard for the activated sludge process

    Since June 2016 a new standard for the design of activated sludge systems is valid. The most significant point is the change of the basic value from BOD to COD. The standard is also the basis for designing SBR-systems. The article discusses main aspects of the new design basis and how AQUA DESIGNER has been modified and adapted to this. In AQUA DESIGNER you can calculate the continuous and ...


    By BITControl GmbH

  • 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

  • The Importance of Dewatering

    With spring comes two things: the onset of construction season for most of our country and rain- lots and lots of rain. The unpredictability of storms and the amount of rainfall is all a guessing game.  Jobsites flood, work stalls and projects get delayed. Rain makes it hard to keep dry and on-schedule. What’s the solution? Dewatering is a technique used to control ...


    By Pac-Van, Inc.

  • 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 reduction and performance analysis of a modified sludge reduction process

    A modified sludge process reduction activated sludge (SPRAS) technology was developed by inserting a sludge process reduction (SPR) module, composed of an aeration tank and a settler, before the activated sludge system was proposed in this study. Compared with the anaerobic/anoxic/aerobic (AAO) process, the SPRAS resulted in a remarkable decrease in sludge production by 76.6%; sludge ...


    By IWA Publishing

  • Biodegradation of Cypermethrin by pseudomonas in a batch activated sludge process

    The biodegradation of Cypermethrin (20 to 125 mg/L) in an effluent using batch activated sludge was studied. Degradation was found to occur to a great extent only in the presence of Pseudomonas (IES-Ps-1) culture. Under aerobic conditions using mechanical aerators, Cypermethrin (20 mg/L) was almost completely degraded in just over 48 h at ambient temperature. Further loading of organic compound ...

  • Biotreatment of Odors from the Zimpro Sludge Conditioning Process

    Management of odor emissions generated during thermal sludge conditioning is a well known disadvantage of the “Zimpro” process. Traditional methods of using chemical oxidation and high temperature destruction result in the formation of secondary products, such as chlorine gas, organic halocarbons or nitrogen oxides. In this study, biotrickling filter technology was evaluated at the Villa Hills ...


    By PRD Tech, Inc.

  • 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 ...

  • To Do Class A or Not? What To Do To Enhance Sludge Processing?

    This paper describes the review and evaluation of current sludge processing enhancement technologies by the Illinois Institute of Technology, Chicago, Illinois and the Metropolitan Water Reclamation District of Greater ...


  • Application of recycled sludge to stabilize coagulation process

    In conventional treatment of variable quality mountain water, an inability to immediately adjust the coagulant dose to variations in water quality causes overdose or underdose of coagulant in relation to its optimal value. The results of the research showed that the reuse of post-coagulation sludge was an effective method to maintain high and stable coagulation effectiveness under both ...


    By IWA Publishing

  • Land remediation & sludge processing case study

    In late 2009 the company was approached by a London based consultancy on behalf of their clients with oil and gas interests in an Eastern European country. The brief was to supply a technology that could assist in the clean-up of historical oil spills around redundant oil wells in a working oilfield. Our initial meeting led us to believe that this was a viable contract and following several ...

  • OUR Set-Point Control of Activated Sludge Processes

    The OUR Set-Point method is useful for controlling the activity and loading-rate capacity of an activated sludge mixed liquor. In this case, sufficient amounts of a stock substrate are added to a mixed liquor suspension to provide kinetic saturation with subsequent measure of OUR. Once an acceptable substrate is found for a specific wastewater treatment plant, an OUR can be identified that ...


    By Challenge Technology

  • Modeling Microbial Decay in a Cannibal™ Sludge Minimization Process

     ABSTRACT To simulate a Cannibal-EBPR system, a sequencing batch reactor (SBR) operated with anaerobic and aerobic cycles was coupled with an anaerobic sidestream bioreactor, which received mixed liquor from the SBR and returned same amount of treated sludge back to the SBR. A mathematical model of the system was used to evaluate the biomass decay coefficient, b, for a control SBR ...

  • Influence of reactor configuration on reliability of activated sludge process

    The effect of uncertainty in system parameters and the accuracy of the mathematical model used on the design and reliability of the activated sludge process is investigated by Monte Carlo simulations. Simulations indicate that the coefficient of variation for a reactor volume varies from 0.56 for a single mixed tank reactor to 0.44 for a plug flow reactor. The coefficient of variation for ...


    By Inderscience Publishers

  • Complete solids retention activated sludge process

    In a slaughterhouse's full-scale extended aeration activated sludge wastewater treatment plant (WWTP), operating under complete solids retention time, the evolution of mixed liquor suspended solids (MLSS) and mixed liquor volatile suspended solids (MLVSS) concentration, food to micro-organisms ratio (F/M) and substrate utilization rate (SUR) were studied for over a year. Biomass growth phases ...


    By IWA Publishing

  • 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

  • Valuation of OSA process and folic acid addition as excess sludge minimization alternatives applied in the activated sludge process

    The aim of this study was to investigate the ability of the oxic-settling-anaerobic (OSA)-process and the folic acid addition applied in the activated sludge process to reduce the excess sludge production. The study was monitored during two distinct periods: activated sludge system with OSA-process, and activated sludge system with folic acid addition. The observed sludge yields ...


    By IWA Publishing

  • Chopper Pumps: Saeby fish processing plant, sludge tank mixing and pumping

    The sludge is coming from the dewatering unit, includes polymers, and has a dry matter content of 15 %. A Landia dry installed pump type MPTKR-I 18,5 kW pump was installed. The pump mixes the tank contents through a recirculation system and pumps the sludge to a tanker truck. The pump was built with a special feeder propeller to make sure it could handle the high dry matter content. The ...


    By Landia

  • Modeling Greenhouse Gas Emissions From Activated Sludge Processes

    Dynamic simulation of activated sludge process is a common tool for wastewater treatment design and optimization. Most activated sludge models predict only the uptake of BOD and nutrients, however, they can easily be supplemented with further information regarding greenhouse gas (GHG) production to predict the generation of components such as CO2. Many published anaerobic digestion models contain ...

  • Assessment Of Single-Walled Carbon Nanotubes On Activated Sludge Wastewater Treatment Process

    This paper evaluated the impact of 95% purified single-walled carbon nanotubes (SWCNTs) on the activated sludge wastewater treatment process through a batch-scale study. We found that the SWCNTs adsorbed 22% of the soluble COD (sCOD, chemical oxygen demand). One-way ANOVA analysis revealed that only four experimental parameters, i.e., surface charge, sCOD, mixed liquor suspended solids (MLSS) and ...

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