Sludge Handling Articles

  • Sludge Blanket Theory: Digging deeper

    With over 50 years of design and manufacturing experience, we are rightly proud of our British-built environmentally friendly SludgeWatch 715 Sludge Blanket Detector. Our user-friendly design is highly portable, simple to use and along with its low cost has worldwide appeal. Things have changed somewhat since our first Sludge Blanket Detector was made back in 1974. No more messy man-handling of ...


    By Partech (Electronics) Ltd.

  • Wastewater-Solids Dewatering Odor Control - Case Study

    Background The Milan Wastewater Treatment Plant, located just south of Moline, Illinois, is a 1.7 MGD (6,434 m3/day) activated sludge facility with an average wastewater flow of 700,000 gpd to 800,000 gpd. This facility dewaters primary sludge using a belt filter press (Figure 1). The press operates an average of three times per month, 8 hours per day at a pump rate of 100 gpm. The ...


    By Carus Corporation

  • The design and installation of the gas collection system

    The designer of gas collection plants has the task to fulfill optimally the important criteria: stability of gas quality efficiency of collection economic viability of the plant The stabilisation of the gas quality helps to solve the problem between the uneven gas production of the landfill on the one side and ...


    By Hofstetter BV

  • Operational strategy, economic and environmental performance of sludge treatment reed bed systems – based on 28 years of experience

    Sludge treatment reed bed (STRB) systems have been used for dewatering and mineralisation of sludge in Europe since 1988. STRB systems provide substantial environmental, economic, and operational benefits compared to mechanical sludge dewatering solutions such as belt presses and centrifuges. They require less energy, no chemicals, reduce the sludge volume and produce bio solids with dry solid ...


    By IWA Publishing

  • Pump it up: making single-pit emptying safer in rural Bangladesh

    Safe emptying and disposal of fecal sludge from pit latrines in rural areas has become a priority for the Government of Bangladesh. In this paper, we calculate the volume and characterize the hazards of managing sludge to identify technologies for safely emptying rural single pits. In Bhaluka subdistrict, an estimated 15,000 m3 of sludge is produced annually. Physical, chemical, and microbial ...


    By IWA Publishing

  • 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

  • Study of kinetics of degradation of cyclohexane carboxylic acid by acclimated activated sludge

    Activated sludge contains complex microorganisms, which are highly effective biodegrading agents. In this study, the kinetics of biodegradation of cyclohexane carboxylic acid (CHCA) by an acclimated aerobic activated sludge were investigated. The results showed that after 180 days of acclimation, the activated sludge could steadily degrade >90% of the CHCA in 120 h. The degradation of CHCA ...


    By IWA Publishing

  • Sludge reduction performance focus: Lagoon sludge case study

    In-Pipe Technology Pipe Technology® Company, Inc., Company, Inc., Company, Inc., is an effective, environmentally is an effective, environmentally is an effective, environmentally-friendly, and fiscally friendly, and fiscally responsible method to reduce accumulated lagoon solids. By reducing accumulated sludge volumes by 40% to 85%, In- volumes by 40% to 85%, In-Pipe Technology has helped ...

  • Sewer Collection System Bioaugmentation Reduces Influent Load and Improves Plant Performance

    Abstract The effectiveness of In-Pipe Technology (IPT) patented sewer collection system engineered bioaugmentation on i) influent wastewater loads to wastewater treatment plant (WWTP), ii) WWTP performance, and iii) effluent quality, was a demonstrated at a domestic sequencing batch reactor (SBR) WWTP (Sewer District #20) in Suffolk County, Long Island, New York in collaboration with the ...

  • Effect of Enhanced Biochemical Processes in the Sewer Collection System on Influent Wastewater Characteristics and Wastewater Treatment Plant Performance

    Short Abstract (less than 100 words) In-Pipe Technology (IPT) employs sewer collection system bioaugmentation treatment to enhance the sewer biochemical processes by improving the microbiology in the collection system, and provides improved microbiology to the wastewater treatment plant (WWTP). In this presentation, the effect of IPT sewer collection system bioaugmentation on sewer ...

  • Life cycle assessment comparison of activated sludge, trickling filter, and high-rate anaerobic-aerobic digestion (HRAAD)

    This paper conducts a comparative assessment of the environmental impacts of three methods of treating primary clarifier effluent in wastewater treatment plants (WWTPs) through life cycle assessment methodology. The three technologies, activated sludge (AS), high rate anaerobic-aerobic digestion (HRAAD), and trickling filter (TF), were assessed for treatment of wastewater possessing average ...


    By IWA Publishing

  • Griffin Industries, Inc. rendering plant, 4` severe duty Crisafulli flump-case study

    Application: Dredging settled rendering sludge from discharge ponds. Customer: Griffin Industries, Inc. Contacts: Windel Stracener, Director of Operations, Michael Grosskopf, Special Projects Manager. Type of Facility: Rendering Plant. Griffin Industries uses its Crisafulli FLUMP on a rotating basis to ...


    By SRS Crisafulli, Inc.

  • Process optimization for solvent salvaging from sludge - Case Study

    Manufacturers of paint removers are now obliged to take back used and contaminated paint remover due to environmental laws and market pressure. AVA supplies thermal vertical evaporation plants in order to reduce the disposal costs created by this and to salvage the solvents contained in the sludge. This offers the advantage that the contaminated paint remover sludge is dried to a residual ...


    By AVA - Huep GmbH u. Co. KG

  • Fate kinetic coefficients and correlation models for tetrabromobisphenol A (TBBPA) in membrane bioreactors and conventional activated sludge process

    Tetrabromobisphenol A (TBBPA) is a fire retardant with endocrine disruption properties, which unfortunately has been detected in trace amounts in various environmental samples. Studies have shown that TBBPA enters the aquatic environment, sediments, soils and biota predominantly through the wastewater treatment process. The dominant contributor to the fate and transport of TBBPA in wastewater ...


    By IWA Publishing

  • Determination of greenhouse gas emission reductions from sewage sludge anaerobic digestion in China

    Sewage sludge is a considerable source of greenhouse gas (GHG) emission in the field of organic solid waste treatment and disposal. In this case study, total GHG emissions from sludge anaerobic digestion, including direct and indirect emissions as well as replaceable emission reduction due to biogas being reused instead of natural gas, were quantified respectively. The results indicated that ...


    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

  • NDMA formation potential removal in treated effluent by UV/H2O2 process

    NDMA formation from treated wastewater is one of the concerns in water reuse. This study focused on NDMA formation potential (NDMAFP) removal in wastewater treated effluent by UV/H2O2 technology. A UV/H2O2 system was tested for the removal performance on both organic precursors and NDMAFP. The system consisted of a low pressure ultra-violet (LPUV) with an intensity ...


    By IWA Publishing

  • Nitrite reduction and methanogenesis in a single-stage UASB reactor

    In this study, nitrite reduction and methanogenesis in a single-stage upflow anaerobic sludge blanket (UASB) reactor was investigated, using high-strength synthetic domestic wastewater as substrate. To assess long-term effects and evaluate the mechanisms that allow successful nitrite reduction and methanogenesis in a single-stage UASB, sludge was exposed to relatively high nitrite loading ...


    By IWA Publishing

  • Sorption of microconstituents onto primary sludge

    The presence of microconstituents (MCs) in the environment has become an emerging concern to scientists and engineers. Sorption is one of the important removal mechanisms for MCs in wastewater treatment plants (WWTPs) since there is significant sludge production. The purpose of this study is to explore sorption kinetics and isotherms of MCs onto primary sludge. Three MCs, bisphenol-A (BPA), ...


    By IWA Publishing

  • Statistical validation of the CLARA Simplified Planning Tool

    The CLARA Simplified Planning Tool (CLARA-SPT) supports economic planning of water supply and sanitation system alternatives by applying life-cycle cost (LCC) principles. The cost functions used in the tool were developed based on standard designs, bills of quantities and a database of country-specific unit rates. In order to make reasonable economic comparison among system alternatives, the ...


    By IWA Publishing

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