Tsurumi's new range of TRN submersible aerators can be used, among other things, to oxygenate biological waste-water-treatment-tanks. They also conform to the new EN 12255-15 European Standard. This new standard requires oxygen transfer rates to be measured under defined standard conditions that specify oxygen should pass through an aeration tank filled with clean water, at a temperature of 20˚C and at sea level altitude.
"The new aerator series offers a large number of improvements in comparison with the previous range," says Tsurumi product manager Carsten Bode. "There is now no need for a separate blower for installation at 6 m and below; the longevity of the machine has been increased; and every single conductor – not just every cable – has waterproof moulding."
Oxygen input rates measured using old standards are often higher than those with EN 1225-15 specifications. Some manufacturers are still using the old method, so customers buying a new piece of equipment should ensure it conforms to the new regulations to compare like-with-like.
As well as being fully EU-compliant, Tsurumi's new submersible aerators have many design features that will increase the lifespan of the equipment. These include an over-sized oil chamber and leading-edge inhouse developed oil-lifter to provide some of the best lubrication around. In addition there are bevelled aerator-casings, which reduce rust by ensuring no water rests on the machine when it is not in operation. The aerators are also made from highly-robust cast iron.
Installation has been made easier as the aerators can easily be put in place with a mobile crane without the need to empty the basin. They also offer a practical advantage as their design means the plant does not need to be totally shutdown while maintenance to the aerators is carried out.
Other advantages of the new aerators are that they can be used to pre-aerate and therefore pre-treat heavily polluted sewage water, and they have the ability to aerate activated sludge basins or neutralise sewage water with C02 or flue gas.
Extensive testing shows the aerators can also deal quickly with algal blooms caused by the eutrophication of lakes, ponds and other natural waters. And the aerators will be an important tool in the flotation process that involves the physical separation of fine-grained solid conglomerates.
The new TRN series will consist of ten models with motor outputs between 0.75 and 40 kW and the first model will be available from autumn 2008, when the production of the old TR/TRN-series will cease.
เครื่องเติมอากาศใต้น้ำ Submersible Ejector TSURUMI BER Series
Submersible Self-Aspirating Jet Aerators Air-inlet Bore(mm) 25 - 50 Motor Output(kW) 0.75 - 5.5 The BER-series is a submersible self-aspirating jet aerators combined a submersible pump with a venturi-jet based diffuser. The liquid flow generated by the submerged pump causes negative pressure to form around the nozzle, whereby drawing in air from above the water's surface. With this jet injector mechanism, the aspirated air mixes with water and is ejected through the diffuser, simultaneously agitating and aerating the ponded water. The mixed air-water is ejected powerfully in one direction, which effectively agitates the water across a wide area.
เครื่องเติมอากาศ Diaphragm Aerator TSURUMI TLD Series
Diaphragm Aerators Discharge Bore(mm) 18 ･ 26 Motor Input(W) 17 - 270 The TLD-series is a diaphragm aerator designed for aerating wastewater or aquarium water. It operates on AC single-phase. The compact but well-built unit offers a high and stable performance, quiet operation, low energy consumption, and excellent durability. Since no oil is used even in the mechanical parts, the aerator requires no lubrication and discharges air without any contamination. A thermal protection device is built in the electromagnets, which ensures a safety operation. The TLD-series is suitable for wastewater aeration (Johkasou or septic tank), aquaculture, Koi pond, and medical equipment, etc.
การเลือกใช้เครื่องเติมอากาศ ให้เหมาะสมกับระบบบำบัดน้ำเสีย สภาพการทำงานของระบบบำบัดน้ำเสีย จะมีค่าความต้องการออกซิเจนแตกต่างกันขึ้นอยู่กับ อัตราการไหลและปริมาณสารอินทรีย์ที่อยู่ในระบบบำบัดน้ำเสีย เครื่องเติมอากาศจะทำหน้าที่เติมออกซิเจนลงไปในบ่อบำบัดน้ำเสียให้มีประสิทธิภาพสูงสุด และทำหน้าที่ในการกวนน้ำเพื่อกระจายออกซิเจนให้ไปทั่วถึงบ่อเติมอากาศไม่ให้เกิด Dead zone