digested primary sludge Articles

  • Predicting concentrations of trace organic compounds in municipal wastewater treatment plant sludge and biosolids using the PhATE™ model

    This article presents the capability expansion of the PhATE™ (pharmaceutical assessment and transport evaluation) model to predict concentrations of trace organics in sludges and biosolids from municipal wastewater treatment plants (WWTPs). PhATE was originally developed as an empirical model to estimate potential concentrations of active pharmaceutical ingredients (APIs) in US surface and ...


    By John Wiley & Sons, Ltd.

  • Improving Wet Weather Treatment Capacity by Converting a Two-Stage Activated Sludge Process to a Single-Stage Process

    ABSTRACTThe Western Virginia Water Authority (WVWA) operates a 42 mgd wastewater treatment facility which treats flows from the City of Roanoke and adjoining municipalities. In recent years, the WVWA WPCP has experienced peak wet weather flows exceeding 140 mgd, well above the plant’s existing peak flow capacity. Under these conditions, the plant is forced to rely heavily on flow ...

  • Biosolids management evaluation study for water reclamation facility, Sioux Falls, South Dakota

    The Sioux Falls Water Reclamation Facility (WRF) treats primary and secondary sludges in three primary anaerobic digesters and one secondary digester. Treated sludge is stored in lagoons until disposal by land application. Continuation of the land application process will require significant investment. The primary purpose of this study is to evaluate alternative biosolids handling and ...


    By IWA Publishing

  • Mogden thames water case study

    Plant inputs : 90,000 Tonnes dry solids/annum 5,466m3 combined sludges/day Primary sludge 60% Secondary sludge 40% Digestion plant : 16 x 4,250m3 Mesophilic digesters (68,000m3 loial capacily) Complete refurbishment technology package 16 New Monsal digester heat exchanger systems 16 New Monsal SGM digester mixing systems Complete upgrade • biogas management system ...


  • Pressure-loss computation procedures for non-Newtonian pipe flow

    Wastewater sludge with solids concentrations above about 2 percent exhibit non-Newtonian behavior, i.e., the sludge apparent viscosity changes with the shear rate (flow velocity). To determine pipeline head loss for sludge streams to and from anaerobic digesters, samples of primary, secondary and digested sludge were collected from Orange County Sanitation District Plant No. 1 and analyzed to ...

  • Inhibition of Biogas Production by Alkyl Benzene Sulfonates (LAS) in a Screening Test for Anaerobic Biodegradability

    Abstract  The effect of the inoculum source on the digestion of linear alkylbenzene sulfonates (LAS) under anaerobic conditions has been investigated. The potential for primary and ultimate LAS biodegradation of anaerobic sludge samples obtained from wastewater treatment plants (WWTPs) of different geographical locations was studied applying a batch test system. It was found that only 4–22% ...


  • CS Bioenergia (BRA) Disposal Company - Case Study

    Digester: 2 x 5.000 m³ Post Digester: 3.400 m³ Gas storage: 3.250 m³ Input substrates: primary and secundary sludge, food waste Scope of services:  concept creation, consulting, detail engineering, delivery of equipment, general project supervision, start-up, operational support and service Estimatet completion date: ...

  • The fate and behaviour of organic micropollutants during wastewater treatment processes: a review

    The fate and behaviour of selected insecticides, herbicides, and polychlorinated biphenyls during primary sedimentation and secondary biological treatment of waste water are evaluated. The physico-chemical properties (chemical structure, aqueous solubility, octanol/water partition coefficient and Henry's Law constant) of these compounds which dictate the extent and mechanism of their removal ...


    By Inderscience Publishers

  • Preliminary evaluation of biosolids characteristics for anaerobic membrane reactors treating municipal wastewaters

    This study assessed the characteristics of biosolids of a pilot-scale anaerobic membrane bioreactor (AnMBR) treating municipal wastewater. The production of total solids (TS) and volatile solids (VS) was comparable to that reported for the extended aeration system at solids residence time (SRT) longer than 40 days. The yields of TS and VS were reduced as SRT increased from 40 to 100 days and ...


    By IWA Publishing

  • Great billing anglian water case study

    Plant inputs : 40.000 Tonnes dry solids/annum Wastewater sludge 12.000 TDS Indigenous, 28,000 TDS cake imports Primary sludge 60% Secondary sludge 40% Advanced Digestion Plant : Monsal EEH • High rate hydrolysis  Cake back mixing • 7-8% DS teed plant Heating technology • water and steam 4 x 3,030m3 + 1 x 4,925m3 Mesophilic digesters (17,045m3 ...


  • Behavior and fate of anthropogenic substances at a Swedish sewage treatment plant

    The behavior and fate of anthropogenic substances during sewage treatment were investigated at a sewage treatment plant (STP) in Sweden which uses mechanical, chemical, and biological methods for sewage treatment and anaerobic digestion of sludge. Influent and effluent water, and sludge from two specific treatment sites were sampled. Mass balances were calculated from measured concentrations of ...


    By IWA Publishing

  • Bristol (Avonmouth), wessex water case study

    Plant inputs : 30,660 Tonnes dry solids/annum Primary sludge 70% Secondary sludge 30% Advanced Digestion plant : Monsal EH - High rate hydrolysis Heating technology - water - from CHP 6 x 2,728m3  Mesophilic digesters (16,368m3  total) Biogas and Bioenergy engineering : Over 33,000m3 /day or 425m3  biogas generated/tonne DS treated 3 x ...


  • Kings lynn anglian water case study

    Plant inputs : 20.000 Tonnes dry solids/annum Wastewater sludge Primary sludge 40% Secondary sludge 60% Advanced Digestion plant : Monsal EEH high rate hydrolysis Hybrid heating technology • water and steam 2 x 5,650m3 Mesophilic digesters Biogas and Bioenergy engineering : Over 390m3 biogas/tonne DS treated 2 MWe CHP installed Heat recovery, steam ...


  • Growth of microalgal biomass on supernatant from biosolid dewatering

    The paper reports the results of an experiment to assess the feasibility of including a photobioreactor within the design of a wastewater treatment plant, growing microalgae on the centrate from anaerobic sludge dewatering. The growth of algal biomass would take advantage of the available nitrogen and provide a substrate for biogas production by anaerobic digestion. Tests were carried out by ...


    By IWA Publishing

  • Success with water-soluble polymers

    An industrial waste treatment system in Texas used AQUACLEAN / ACF-32 in their plant to reduce BOD, Ammonia, TOC, and TSS. This industrial site was processing water-soluble polymers that were proving to be difficult for their activated sludge system. In the existing system design, the influent stream is first treated by a pH adjustment to a level of 12 or higher, and then is later anaerobically ...


    By BluePlanet Labs

  • A critical review of experimental and predicted methane generation from anaerobic codigestion

    Anaerobic digestion is increasingly being considered as a treatment option for an extensive range of waste biomass, due to the potential for energy recovery, in the form of methane production, and lower sludge volumes relative to aerobic treatment processes. Furthermore, when two substrates are codigested (i.e. digested together), added benefits are foreseeable, such as increased methane ...


    By IWA Publishing

  • Life Cycle Assessment of an intensive sewage treatment plant in Barcelona (Spain) with focus on energy aspects

    Life Cycle Assessment was used to evaluate environmental impacts associated to a full-scale wastewater treatment plant (WWTP) in Barcelona Metropolitan Area, with a treatment capacity of 2 million population equivalent, focussing on energy aspects and resources consumption. The wastewater line includes conventional pre-treatment, primary settler, activated sludge with nitrogen removal, and ...


    By IWA Publishing

  • Response of Different Types of Biosolids to Simultaneous Dewatering and Pathogens Inactivation by Electrokinetic System

    Only electrokinetic system and its effect on the inactivation of pathogenic organisms in biosolids were investigated. Bench scale experiments were conducted in a series of electrokinetic (EK) reactors. Ten EK reactors were set up with different types of sewage sludge: primary, secondary (attached growth culture), secondary (activated sludge), and anaerobically digested sludge, coming from Auteuil ...

  • Ashford STC Expansion, United Kingdom

    Southern Water 10.5 tons dry solid per year (TDS/yr) The Client Southern Water provides water supply and sewerage services in the counties of Kent, East and West Sussex, Hampshire and the Isle of Wight, and small parts of Wiltshire, Berkshire and Surrey. The Client's Needs The purpose of the works was to ...


  • Municipal waste water treatment plant case study

    A municipal WWTP in the North of England was experiencing significant problems with accumulations of FOG in the Wetwell at the head of the treatment plant. The FOG would form a solid cap over the well several feet thick. This put considerable strain on the pumping gear, interrupted the performance of the float switches and required regular manual intervention from the staff. High costs were also ...


    By Cleveland Biotech Ltd.

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