42 Gas Detection Sludge AD biogas Analysis in Turkey
At the $150m Antalya wastewater treatment plant, one of the biggest in Turkey, the operator knew what they wanted for anaerobic digestion (AD) biogas analysis. They specified a low maintenance AD biogas monitoring system, with completely automatic operation and remote online support from the manufacturer. In addition they wanted local sales support and service which is provided by the Geotech distributor in Turkey, RAM who supplied a Geotech (UK) AEMS static gas analyser.
At the plant every day over 3,000,000 cubic meters of waste water are treated through 28 units of biological waste water treatment plants, two advanced biological waste water treatment plants, nine waste-water preliminary facilities and 68 pumping stations. The operator is the Kuzu Group and General Directorate of Antalya Water and Wastewater Administration. The Kuzu Group operates all the wastewater treatment plants in Istanbul.
Before the biogas goes to a 2,569 kVA/h CHP engine it is analysed by the Geotech AEMS (Automated Extraction Monitoring System) unit. The biogas analysis data also indicates the stability of the anaerobic digestion process. The AEMS unit was installed and commissioned in a single day by a Geotech service support engineer and since then has run automatically 24/7. A second AEMS unit will be commissioned next.
When the site is fully operational, daily totals of 80,000kg
of water-treatment sludge will be processed by four anaerobic digesters, producing up to 26,400 cubic meters of biogas. Built on top of the four anaerobic digesters is a conference room with panoramic views across the Antalya site. The city of Antalya, with a population if one million, is located on the Turkish Mediterranean coast.
The Geotech AEMS static gas analyser has extensive application options with multiple sampling points, data inputs and 4-20mA local data outputs, PROFIBUS and MODBUS comms options, Ethernet and Internet connectivity, data logging and data transfer.
Users of a Geotech AEMS unit have the option of using Geotech AEMS Data Centre software. With this the user retains their own set of data as the AEMS unit stores audit-trailed readings/data sets for well in excess of six months. The data can be viewed on-line with the password-protected Geotech AEMS Data Centre software globally from any PC and downloaded to spread sheets. Using the AEMS Data Centre, operators can remotely remove data from the on-site AEMS flash disk memory once received by the AEMS Data Centre so the in-field unit need never reach a data capacity limit.
For applications not requiring the extensive capability of Geotech AEMS, the user-installed Geotech GA3000 static gas analyser delivers exactly what many users need and at a very attractive package price. Newly announced for the GA3000 is MODBUS digital output allowing communication with SCADA systems. Simple and robust, MODBUS has become an industry standard, allowing communication between many devices. This means that biogas concentration data from the GA3000 can be readily integrated with flow, pressure, and other instrumentation.
Reader Reply Card No. 109
Perfect Interaction for Maximum Safety
The new G400-MP2 pump from GfG (Germany) communicates with the gas detectors G450/G460. This interaction allows fault indication via the detector display. Low battery, blocked sampling line or interrupted power fault modes are shown on the display and activate different visual and audible warnings.
Gas samples can be taken from distances of up to 100m with considerable low- pressure performance; the safe solution for confined space measurement.
The G400-MP2 is the only attachable pump available which may remain fixed to the detector. When the pump is turned on, the diffusion inlets are covered and the measurement results are not affected by air flows.
An additional filter system in the sampling line protects pump and sensors from dust and moisture. When the pump is turned off, the gas detector can be operated as usual. The diffusion inlets now allow all gases to enter the sensor chamber.
The G400-MP2 is operated on its own power supply, independently from the gas detector; i.e. the pump does not affect the operational time of the G450/G460. The pump power supply allows at least 10 hours of continuous operation.
Reader Reply Card No. 110
All Calibration Gas and Specialty Gas Needs from One Source
UK based Scientific and Technical Gases Ltd (StG) is an independent European supplier of calibration gases in a wide range of container sizes. StG pride themselves on being able to supply the complete range of calibration gases for the gas detection, laboratory, petrochemical and environmental monitoring industries. They are active members of the Council of Gas Detection and Environmental Monitoring (CoGDEM), the British Compressed Gas Association (BCGA) and the Source Testing Association (STA).
StG’s customer services and production are integrated so they can offer short lead- times, same-day quotes and excellent customer service from trained and knowledgeable business managers. StG’s dedicated internal logistics team specialise in reliable shipment of our gases within the UK, Europe or globally. Incoming queries are handled directly through their dedicated customer service and sales term who provide friendly, helpful advice and quotations usually on a same-day basis. StG’s aim is to build long-term working relationships with their clients based on their quality product range and excellent service.
Reader Reply Card No. 111 Reader Reply Card No. 112
IET November / December 2011
www.envirotech-online.com
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