P.E Articles

  • Train derailment prompts contaminated land investigation

    On March 30th 2015 a long freight train, transporting a variety of goods including lumber and chemicals, wound its way through the state of Mississippi. At around 5pm, part of the train failed to negotiate a curved portion of the track in a rural area near Minter City, resulting in the derailment of nine railcars, one of which leaked chemicals onto agricultural farmland and woodlands. Emergency ...


    By Gasmet Technologies Oy

  • Putrajaya WWTP, Phase I & II, Kuala Lumpur

    Design capacity of 300 000 P.E (phase 1) and 600 000 P.E. (phase II) DEWACO Supplied full package for the sludge dewatering comprise of: 2 nos. BT2025 + 2 nos.SP16L (each hydraulic capacity 45m3/hr), along with peripheral equipment for Phase I Project completion: 1998 2 nos. BT2525 + SP 21L(each hydraulic capacity 64m3/hr), along with peripheral equipment for ...


    By Dewaco Ltd

  • Putrajaya WWTP, Phase I & II, Kuala Lumpur CSS

    Design capacity of 300 000 P.E (phase 1) and 600 000 P.E. (phase II) DEWACO Supplied full package for the sludge removal system of: 4 nos. Chain & Flight type sludge and scum collectors and 4 nos. scum pipes (each 62m long and 9m width) for Phase I Project completion: 1998 10 nos. Chain & Flight type sludge and scum collectors and 10 nos. scum ...


    By Dewaco Ltd

  • Organic matter stabilization in reed bed systems: Danish and Italian examples

    In this study, results about sludge stabilization in reed bed systems (RBSs) after the entire period of operation in two different systems situated in Denmark (Helsinge 42,000 population equivalent (p.e.) – 10 years) and in Italy (La Fontina, 30,000 p.e. – 6 years) were presented. In order to evaluate the process of sludge stabilization, parameters that highlighted the biochemical ...


    By IWA Publishing

  • Cost comparison of wastewater treatment in Danubian countries

    This paper investigates the costs of wastewater treatment (including sludge management) within the Danube catchment countries A, CZ, SK, HU, SL, RO, BG and UA. TK is considered as well. Additionally, the paper compares the total costs of wastewater management (including sewerage) with the incomes in the different countries. The annual costs of wastewater treatment in Austria are about 30 €/p.e. y ...


    By IWA Publishing

  • Cyclic activated sludge technology

    Cyclic activated sludge technology was selected for the Potsdam Wastewater Treatment Plant (90,000 p.e.). The cyclic activated sludge facility comprises four modules integrated into two circular basins. Construction was commenced in February 1998 with seeding of the plant for start up taking place in October 1998. Process performance has been met since Spring 1999 at 80-90 ...


    By Water Experts Germany

  • Fabric Cover Puts Lid on Odor Emission Problems

    The Escambia County Utilities Authority (ECUA) of Pensacola, Fla., was experiencing odor emission problems at its 20 mgd Main Street Wastewater Treatment Plant, which is only two blocks from Pensacola city hall and the regional office of the Florida Department of Environmental Protection. According to Stephen Holcomb, P.E., Water Reclamation Director at ECUA, an 85 foot diameter gravity ...


  • Alpha Septic Tank 2800 litre serving a 2-bedroom cottage – Kent

    Site Description 2- Bedroom cottage, Kent RequirementsA basic septic tank to cater for waste produced from 2-bedroom (maximum 4-persons: P.E equivalent), one shower / bath, single sink, washing machine. Installation dateJune 2005 Product Alpha Septic Tank 2800 litre NotesBeing a ...


    By Kingspan Environmental Ltd

  • BA BioDisc treatment plant serving a 3-bedroom farmhouse – Cumbria

    Site Description3- Bedroom farmhouse, Cumbria RequirementsA packaged sewage treatment plant to cater for waste produced from 3-bedrooms (maximum 6-persons: P.E equivalent), one shower / bath, single sink, washing machine. Installation dateJan 2006 ProductBioDisc BA NotesThe client ...


    By Kingspan Environmental Ltd

  • Use of Mass Balances for the Determination of Oxygen Contribution of the Different Air Sources in a Full-Scale Membrane Bioreactor

    MBRs necessitate two sources of aeration: one for scouring the membranes (coarse bubble, CB) and the other for the biomass requirements (usually fine bubble, FB). In the framework of a in-depth study of a full scale municipal MBR plant (10 000 p.e.) where CB and FB are in the same tank (Biosep®), mass balances were used to determine the OTR of the different combinations of CB+FB at different air ...

  • Environmental assessment of two small scale wastewater treatment systems: SBR vs CAS

    European Water Directive 91/271/EEC introduced a series of measures aimed at protecting sensitive areas against the emission of nutrients originating from waste water treatment plants. There are, however, environmental costs associated with achieving the required level of water quality, such as greenhouse gas emissions resulting from energy consumption. The goal of this study is to assess ...


    By IWA Publishing

  • Ruzomberok (Slovakia) Industrial WWTP - Case Study

    Number of Tanks: 4 Total Volume: 10,000 m³ Water Depth: 4.0 m SOTR Standard Oxygen Transfer Rate: 5,095 kgO2/h Total Airflow: 61,680 Nm3/h No. of AEROSTRIP® Diffusers: 3,000 Ružomberok is a city in northern Slovakia with around 30,000 inhabitants. The local ...


    By Aquaconsult Anlagenbau GmbH

  • Housing lusk, temporary sewage treatment plant

    Address: Lusk, Fingal, Co. Dublin Client: MMD Consortium (Three House Building Companies) Engineer/Client Contact Details: Michael Fitzpatrick, Fahy Fitzpatrick Consulting Engineers, 2057, City West Campus, Naas Road, Dub 24. Ph: 01 4030171 Completion Date: Ongoing Population Equivalent: 8,000 P.E. On ...

  • French vertical-flow constructed wetland design: adaptations for tropical climates

    The French Outermost Regions are under tropical climate yet still have to comply with both French and EU regulations. French vertical-flow constructed wetland systems appear well adapted to the technical specifics of these regions but their adaptation to tropical climate requires new design guidelines to be defined (area needed, number of filters, type of plants, material to be used, etc.). A ...


    By IWA Publishing

  • Shillelagh sewage treatment works

    Address: Shillelagh, Co. Wicklow Client: Wicklow County Council Engineer/Client Contact Details: Sean O'Neill S.E.E, Environment & Sanitary Section, Wicklow Co. Co., County Buildings, Wicklow. Ph: 0404 20100 Completion Date: September 2001 Population Equivalent: 8,00 P.E. ...

  • Kinetic study of compost liquor nitrification

    This study is a first kinetic approach about the compost liquor treatment by activated sludge. This industrial wastewater is highly loaded in organic and nitrogen compounds (COD≈12,000 mg L−1 and NH4+-N≈4,000 mg L−1). The possibility of its treatment in an urban WWTP is studied measuring ammonia oxidation rate with non-acclimated sludge to the industrial effluent. Compost liquor appears as an ...


    By IWA Publishing

  • Removal of endocrine disrupting compounds from wastewater treatment plant effluents by means of advanced oxidation

    Municipal sewage and WWTP effluents are considered to be a major source of pollution, regarding the occurrence of endocrine disrupting compounds (EDCs) in the environment. Although removal potential of many EDCs by conventional WWTPs is recognised, literature data are not easily comparable. Besides, in order to reach very low concentrations, a further treatment might be sometimes required. ...


    By IWA Publishing

  • Sand, surf and septage (Malibu Beach)

    Onsite systems at 16 beaches on Santa Monica Bay, Calif., had exceeded their useful lives. Most were at risk of overflows and required pumping every two weeks, as sand blowing in through corroded cast-iron lids filled them three-quarters full. Monthly water samples taken by the Los Angeles County Department of Environmental Health confirmed intermittent high bacteria counts. Concern for the ...


    By Geoflow, Inc.

  • Thermal hydrolysis, anaerobic digestion and dewatering of sewage sludge as a best first step in sludge strategy: full scale examples in large projects in the UK and strategic study including cost and carbon footprint.

    Abstract This paper shows that by using thermal hydrolysis process (THP) as a pre-treatment for anaerobic digestion (AD) it is possible to develop a step wise approach to sludge strategy that is cost effective and flexible. By generating a low volume of non odorous, well dewatered and safe digested cake it is possible to recycle sludge directly to agriculture or dry it for fuel use or ...


    By Cambi Group AS

  • Mountbolus sewage treatment plant

    Address: Mountbolus Village, Co. Offaly Client: Offaly Co. Co. Engineer/Client Contact Details: Sanitary & Environment, Offaly Co. Co., County Buildings, Tullamore, Co. Offaly David Hogan S.E.E, Ph: 0506 46800 Completion Date: March 2000 Population Equivalent: 400 P.E. Value: € ...

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