AVFM 5.0 area-velocity flow meter monitors sewage lagoon discharge flow - Case Study
Courtesy of Greyline Instruments Inc.
The Township of South Glengarry in Eastern Ontario discharges continuously from their 72,000 m3 sewage lagoon. But they ran into flow measurement problems when their magnetic flowmeter was unable to detect seasonal low flow rates.
Operations Manager, Shawn Killoran selected a Greyline AVFM 5.0 Area-Velocity Flow Monitor because it was simple to install in a horizontal discharge pipe from the lagoon and because it could accurately detect and monitor the full range of flow rates up to 3,800 m3/D.
Township operators liked the Greyline AVFM 5.0 datalogger reporting system where formatted flow reports (total, minimum, maximum and average) could be downloaded automatically to a USB memory stick without carrying a laptop to the site.
The AVFM 5.0 flowmeter electronics were ACpowered and installed in an insulated shed along with a sampler.
The sealed ultrasonic flow sensor was mounted through a tee section at the invert of the pipe and A stainless steel bracket was screwed into the pipe to secure the sensor in place.
After several months of operation, no algae, sediment or weed build-up was observed on the sensor. But the mounting location was fitted with a removable cover to allow periodic cleaning if required.
Lagoon Discharge Flow Monitoring - Case Study
Open Channel Flow Monitoring without a Flume or WeirTownship operators liked the Greyline AVFM 5.0 datalogger reporting system where formatted flow reports (total, minimum, maximum and average) could be downloaded automatically to a USB memory stick without carrying a laptop to the site.The Township of South Glengarry in Eastern Ontario discharges continuously from their 72,000 m3 sewage lagoon. But they ran into flow measurement problems when their magnetic flowmeter was unable to detect seasonal low flow...
Quarry dewatering compliance - Case Study
Louis W. Bray Construction installed a Greyline Area-Velocity Flow Meter in 2009 to meet Ministry of Environment regulations. Their permit stipulated effluent limits plus monitoring, sampling and flow measurement of wastewater discharged from the site to the South Raisin river. The Ontario Water Resources Act requires flow monitoring for any quarry dewatering greater than 50,000 liters per day.Quarries operating below the water table dewater by pumping from the quarry pit. Some sites are able to reuse water in...
Cloonamahon handicapped residential centre
Address: Cloonamahon, Collooney, Co. Sligo Client: North Western Health Board Engineer/Client Contact Details: Jennings O`Donovan & Partners, Finisklin, Sligo David Kiely, Ph: 071 9161416 Completion Date: March 2001 Population Equivalent: 400 P.E. Value: â‚¬ 138,392 + Vat BMS Design Details: BMS designed and manufactured the entire treatment system to the consultants final effluent requirements. BMS were responsible for the following: screening, pumps, pump sump, sewage treatment plant, ferric dosing...
Algae-X Alarm Helps You Keep Water Out Of Fuel
An article introducing the Watect 550 Water Sensor Alarm Module detailing how Algae-x`s new water sensor`s unique and proprietary measuring method eliminates electrolytic probe corrosion and works with common water probes and sensors.
Improved Open Channel Flow Measurement & Control Using Pulsed Hybrid Flat Bed Magmeters
ABSTRACT This paper introduces Pulsed Hybrid flat bad magnetic flowmeter techniques and how they improve the quality of flow measurement and control over existing art, normally with significant cost savings in operation and installation. The flat bed magmeters have been extensively tested in the laboratory and on-site, with details given for a particular site case. Such tests gave evidence of consistent and successful co-relation between NIST traceable laboratory calibrated accuracy and accuracy found onsite.
Chicago Suburb Saves Nearly $1/2 Million in Annual Water Revenue
A few years after replacing 5,000 residential water meters with a new intelligent water meter, the Village of Tinley Park, Illinois decided to investigate the possibility of replacing its remaining meters. Once the thriving suburb of Chicago learned the extent of revenue lost due to its aging installed base of meters, the decision became a simple one. In 2001, Severn Trent Services developed and introduced the SmartMeter™ SE700, a water meter specifically targeting the North American residential market. Soon...
Use of Barley Straw for Algal Reduction in Sewage Lagoons – Operational Considerations
Pecos began use of barley straw as a clarification aid in June 2005 to determine its effectiveness as part of a phased treatment plant replacement. Phase I includes construction of a new UV system that will disinfect effluent received directly from Lagoon No. 3. However, this phasing would place a heavy TSS loading on the UV system. As barley decomposes, a chemical is emitted that inhibits algal growth and provides clarification of the lagoon treatment system effluent. Little is known about the actual mechanism...
InfoWorks RS models Mexican river flooding
Untitled Document The CNA Chiapas regional office, part of Mexico’s Water Commission, has been undertaking a major river modeling exercise using InfoWorks RS from software solutions provider Wallingford Software. The role of the CNA Mexico’s National Commission of Water (CNA) is heir to a great tradition of hydraulic engineering, and during the course of its existence has been fortunate in having outstanding professionals and specialists from various disciplines within its ranks. The...
Model success for Melbourne Water
Untitled Document Melbourne Water has been successfully using InfoWorks CS from software solutions provider Wallingford Software to create a macro model of its sewerage network that will enable it to ensure it meets all its environmental targets. Melbourne Water is owned by the government of the state of Victoria, in the south east of Australia. It manages Melbourne’s water supply catchments, removes and treats most of Melbourne’s sewage, and manages rivers and creeks and major...
The Otay Mesa Trunk Sewer: helping development in southern San Diego County
Untitled Document The City of San Diego in California is the state's most southerly conurbation, sited just a few miles from the Mexican city of Tijuana – so close that a trolley bus runs every ten minutes down to the busy border at San Ysidro. A sprawling, pleasant mix of ultra-modern medium-rise blocks, wide palm-lined boulevards and Spanish-style dwellings, San Diego is experiencing the same inexorable population pressures as most Californian cities. One area that remains relatively undeveloped,...
This is a collection of various cases where the 2D resistivity imaging method pioneered by Advanced Geosciences Inc have been successfully applied. Click on a section below and you will be shown a full 2D resistivity imaging brochure detailing the case in question. Acknowledgement: These cases have been submitted by satisfied customers whom we thank for permission to publish their data on the web. Each detailed brochure will have a citation for the source of the...
CMOM Workshop, Austin, Texas - Capacity Assurance by Metering and Modeling
Untitled Document Why is flow metering important? There are two fundamental reasons for the importance of flow metering and measurement. First, information, either for direct management needs - “You can't manage what you can't measure” - or indirectly for further analysis, including modeling. The second is its role in operational control. SCADA measurement for example is often directly linked to system controls, tracking trends and changes in system characteristics, just like a blood...
Recovery of Precious Metal Catalysts - A New Process Using Supercritical Water Oxidation
Up to now, the recovery of precious metals used as catalysts in chemical processes has involved the use of incineration. Now, however, a British-Swedish joint venture has developed a process which uses supercritical water oxidation instead, which provides many economic and environmental advantages. Precious metals are used extensively in catalysts in a wide range of industrial chemical processes. Sometimes they are used in a homogeneous form, but more often fixed to a solid support for ease of handling. In many...
Sludge Disposal that’s Sustainable, Safe and Economically Viable
The Kemwater Recycling Process – KREPRO for treatment of sewage sludge is based on a completely new separation technology, which uses existing knowledge in an innovative way. It reduces both the organic and inorganic content of the sludge. The organic content is re-duced by about 30% and the inorganic about 70% if digested sludge is treated. All metals and salts are dissolved; the remaining undissolved inorganics are mainly silicates like sand and grit. In constast, most sludge treatment technologies used today...
Management of Waste Generated by Mobile Offshore Drilling Units in the Timor Sea
Woodside Energy Ltd is recognised as a major Australian resource company committed to quality and protecting the environment. Woodside actively manages their exploration activities so as to avoid environmental impacts. As part of their Timor Sea exploration activities, they produce a significant quantity of waste that includes a hazardous and industrial non-toxic component. In recognition of the potential pollution problem that improperly managed waste can produce, Woodside operates under a comprehensive Ocean...
Baseline Projections of Selected Waste Streams
Abstract Waste represents an enormous loss of resources both in the form of materials and energy. Indeed, quantities of waste can be seen as an indicator of the material efficiency of society. Waste generation is increasing in the European Union, and amounted to about 3.5 tonnes of solid waste per person in 1995 (excluding agricultural waste) 1 Excessive quantities of waste result from: inefficient production processes low durability of goods unsustainable consumption patterns. Solid waste is also increasingly...
Worldwide Coastal and Oceans Woes Continue.
`The oceans are in trouble and so are we,` oceanographer Sylvia Earle, National Geographic explorer in residence and researcher for the Smithsonian, was quoted as saying in an article on the web by Seth Borenstein writing for the Philadelphia Inquirer and San Jose Mercury News Washington Bureaus. Citing a study by the Harvard Medical School`s Center for Health and the Global Environment covering 1976 to 1996, Borenstein reports a greater than fourfold increase in harmful algal blooms (74 to 329). `stranding of...
Investigation of High Temperature Pyrolysis as a Recycling Method for Plastics
Abstract The possibility of high temperature pyrolysis for gasification of plastics as a thermal recycling method has been investigated. A laboratory apparatus for high temperature pyrolysis was built up which consists of an inductive furnace with an equipment to collect the products of pyrolysis and to allow pyrolysis to take place in various gas atmospheres, e. g. argon and oxygen and mixtures of nitrogen and oxygen, which have been used in fact. The plastic material could be dipped below the surface being...
KPDES Permit Compliance: Metals in Wastewater Effluent at Fort Knox
ABSTRACT Prior to constructing a new FOTW, Fort Knox had a history of exceeding KPDES effluent limitations for ammonia and BOD. The new 6 MGD FOTW solved the problem, but metals exceedances became an issue. The exceedances could be linked to several factors: low water-quality based effluent limitations (WQBELs) on the new KPDES permit, high background concentrations of some metals, and high metals in some waste streams. Fort Knox adjusted its operating practices and negotiated with the agency to achieve...
The Monitoring and Pre-treatment of Brewery Trade Waste Prior to Discharge: Carlton & United Brewery
Carlton United Brewery installed a Trade Waste Monitoring System to analyse the temperature, flows, pH and chemical compounds in their trade wastewater. This cleaner production initiative was a licensing condition of the Northern Territory`s Power and Water Authority (PAWA). As a result of the pretreatment, CUB is able to discharge their brewery wastewater to sewer. Background Carlton and United Breweries purchased the Darwin Brewery in October 1996 and commenced operations in November 1996. The Brewery is...
A Multi-Sensor Piezometer for Shallow Marine Sediments in Coastal Environments
A multi-sensor piezometer has been developed to measure dynamic excess and ambient pore pressures in shallow marine sediments under the effect of surface waves, tides, and currents. The probe consists of a shaft (1.5 m long with five porous stones at subseafloor depths ranging from 0.10 to 0.93 m) and two upper chambers (one that is hermetically sealed for the transducer electronics and another that is hydraulically connected to the free water column). Pore pressures in the sediments under the effect of surface...
Pressures on the environment may occur through chemical, physical and biological agents. The subject of this study is physical agents, where physical fields are examined. Physical fields are part of the natural environment. Depending upon their properties and the surrounding conditions, physical fields are transmitted through the spaces in which we live, potentially affecting human health and nature. Human activity can add to, modify, and enhance and reduce the intensity of these fields. Furthermore, changes in...
The Asbestos Management and Maintenance Program
STEP ONE: ASSESSMENT AND SURVEYThe first step of the Asbestos Management Program is to do an asbestos survey to assess the location, identify the type of asbestos, the condition of the asbestos and identify a maintenance record. This asbestos inventory or assessment is usually carried out by an independent consulting firm. This assessment or survey will include: Identification and location of the Asbestos Containing Materials (ACM) Assessing the condition of asbestos and its accessibility. Preparing a long term...