effluent weir Articles

  • WPL supplies Farne Salmon and Trout with a substantial new effluent treatment plant

    A new effluent treatment plant designed by WPL is ensuring that Farne Salmon and Trout Ltd in Berwickshire - one of Europe's largest smoked salmon facilities - complies with tighter local trade effluent discharge regulations, whilst significantly reducing its sewer discharge costs. WPL worked with Farne and Scottish Water from an early stage to design and supply a substantial, energy efficient ...


    By WPL Ltd

  • WPL supplies Farne Salmon and Trout with a substantial new effluent treatment plant case study

    A new effluent treatment plant designed by WPL is ensuring that Farne Salmon and Trout Ltd in Berwickshire - one of Europe's largest smoked salmon facilities - complies with tighter local trade effluent discharge regulations, whilst significantly reducing its sewer discharge costs. WPL worked with Farne and Scottish Water from an early stage to design ...


    By WPL Ltd

  • Performance evaluation of a novel open trickling filter for the post-treatment of anaerobic effluents from small communities

    The objective of the work is to evaluate the performance of an innovative design of a trickling filter for small population sizes, which has been implemented for the post-treatment of sanitary effluent from a UASB (upflow anaerobic sludge blanket) reactor. The unit, named open trickling filter (OTF), operates with no side walls, no perforated bottom slab and no secondary settler. The OTF packing ...


    By IWA Publishing

  • Aftermath of the Long-Term Application of Sludge and Water from a Sewage Treatment Plant to a Lemon Tree (Citrus limon) Plantation

    The effect of sewage sludge application to agricultural soils in industrial countries (Raven and Loeppert 1997; Towers and Horne 1997) and that of the treated domestic and industrial effluents on plants (Hooda et al. 1997; Logan et al. 1997; Palacios et al. 1999; Samaras and Kallianou 2000, Weir and Allen 1997) have been ...


    By Springer

  • SaniTEE: an ideal septic tank wastewater screen

    SaniTEE is an effluent wastewater screen (commonly known as an effluent filter) that reduces the gross suspended solids discharged in septic tank effluent. This helps extend the lives of drain fields, reduces clogging of orifices in effluent disposal systems, and allows use of non-solids handling effluent pumps. It is shown in Figure 1. It fits inside a standard septic tank outlet tee by dropping ...


    By Bio-Microbics, Inc.

  • Algae Control Spray System for a southern Nevada Wastewater Treatment Plant

    Nicknamed "NESI" by the facility staff both because of its large size and slight  resemblance to the mythical Lochness Monster, this WeirWasher Automated Cleaning System also has the important ability to submerge, resurface, and telescope.  These motions are necessary to control the prolific algal growth on the weirs and effluent launder in the circular secondary clarifier. The ...


    By GillTrading.com, Inc.

  • Assessomg the Performance of Secondary Settling Tank by Means of Flow Modeling

    ABSTRACTA model of the double-decker rectangular settling tanks proposed for the Wastewater Treatment Plant of Besòs in Barcelona, Spain was prepared using Computational Fluid Dynamics (CFD). The modeling approach used was a three dimensional, multi-phase simulations with solids transport and removal included, and reflected the state of the art in clarifier modeling. Special attention was paid to ...

  • Open Channel Flow - The use of Level sensors for open channel flow measurement

    Open Channel Flow - The use of Level sensors for open channel flow measurement Level sensors from SolidAT are implemented in Open Channel Flow applications. In these types of applications, the level sensor is installed above a special water flow structure and accurately measures level of flowing water or wastewater. The sensor then calculates flow through the structure ...

  • Gem-D Series - Case Study

    Introduction Clean Water Technology, Inc., the creator of the Gas Energy Mixing (GEM) System, introduces their newest in technology The GEM - D Series for municipal water and wastewater applications. The GEM-D Series is a hybrid dissolved air – flotation system. What makes the GEM-D Series better than the rest? Introduction of air through Liquid Solid Gas ...


    By Clean Water Technology, Inc.

  • The role and control of sludge age in biological nutrient removal activated sludge systems

    The sludge age is the most fundamental and important parameter in the design, operation and control of biological nutrient removal (BNR) activated sludge (AS) systems. Generally, the better the effluent and waste sludge quality required from the system, the longer the sludge age, the larger the biological reactor and the more wastewater characteristics need to be known. Controlling the reactor ...


    By IWA Publishing

  • Algae Control Methods Compared: The Importance of Successful Algae Control for Facilities with UV Disinfection

    In Connecticut, with the change over to UV from Chlorination for disinfection at some of the State’s WPCFs (Water Pollution Control Facilities), it has been observed that an increase in attached algal growth along with a proliferation of a dense population of “tiny” snails (Pouch Snails) is occurring in the UV chamber(s).   The end result appears to cause an ...


    By GillTrading.com, Inc.

  • DLT 2.0 differential level transmitter open letter from a Greyline customer

    The Process: The Municipality of the District of Lunenburg in Whynott's Settlement, Nova Scotia added a septage receiving station to their landfill site. Part of the treatment train is a chlorinated duplex vertical turbine pump station delivering effluent from the sludge processing facility to a field of spray nozzles for dispersion. The pump station has two points of discharge and the ...


    By Greyline Instruments Inc.

  • HS-200 Used in natural gas production

    A unique and proven wastewater treatment system is being used at several natural gas compressor stations. Oil leakage and spills when servicing compressors together with maintenance wash-down water, are being satisfactorily treated with oil removal systems. The systems usually consist of a wastewater holding tank with an oil drain off valve, a coalescing oil/water separator ...


    By Hydrosil International

  • Case study - Industrial ASBR wastewater treatment facility, India

    This two (2) basin ASBR facility near Mumbai, receives a variety of industrial wastewaters collected from many factories and chemical production facilities. The 10,000 m3/d wastewater plant comprises flow metering, chemical treatment,  pH correction, flow splitting, flow equalization with aeration, chemical precipitation and lamella plate clarification, two (2) basin ASBR biological ...

  • Implementation of CFD modeling in the performance assessment and optimization of secondary clarifiers: the PVSC case study

    The water industry and especially the wastewater treatment sector has come under steadily increasing pressure to optimize their existing and new facilities to meet their discharge limits and reduce overall cost. Gravity separation of solids, producing clarified overflow and thickened solids underflow has long been one of the principal separation processes used in treating secondary effluent. ...


    By IWA Publishing

  • Denitrification and Floating Sludge

    What is Denitrification? Denitrification is the conversion of soluble nitrate to nitrogen gas in the nitrogen cycle. For denitrification to occur, three factors are needed: Presence of Nitrate Anoxic conditions (no free dissolved oxygen) A carbon source (soluble BOD) Floating Sludge Denitrification is useful and ...

  • What are the parameters of an extended-aeration activated-sludge system?

    The activated sludge process is the most widely used biological water and wastewater treatment. As is well known, by its means, suspended-growth microorganisms are applied to breakdown wastes. Aeration, the mixing of air and a liquid, is the means used to speed the reactions involved. Aeration methods include spraying the liquid into the air; diffusing air into the liquid or agitating the liquid ...

  • Clarifier maintenance

    Clarifiers are expensive, to buy or repair, and their downtime can be costly in fines imposed by regulatory agencies and in community ill will. Regular maintenance, an annual inspection of the mechanism and an occasional touchup of the paint or coating system are simple and inexpensive proactive steps that will usually prevent most problems. Three components of all clarifiers require maintenance: ...


    By WesTech Engineering, Inc.

  • Hydraulic modeling: The often overlooked factor in treatment plant design

    Treatment plant hydraulics is often overlooked as one of the most important aspects of treatment plant design, especially in plant upgrade scenarios where retrofitting new equipment or processes into the existing treatment train will create additional hydraulic restrictions.  Many existing plants already have a minimal amount of head available for passing peak flows through the system, which ...


    By Innovative Hydraulics

  • Key Operating Strategies for Chlorine Disinfection Operating Systems

    ABSTRACTChlorine has been used as a standard for disinfecting wastewater for many years. While being the standard There are many levels of automation for control of disinfection. To select the best control approach for your facility both control strategies and chlorination chemistry must be understood. Permit conditions must also be fully identified; organism concentrations and operational data. ...

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