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Ebara Engineering Review No.227

Phosphorus Recovery using a Crystallizer for Sewage Treatment

by Kazuaki SHIMAMURA, Tateki KUROSAWA, & Shojiro WATANABE

A novel phosphorus recovery system, which enables an effective reuse of recovered phosphorus, has been developed for use in sewage treatment. This system constitutes 5 processes, each matching specific sewage characteristics (sewage constituents, concentration, flow rate, etc.). Verification tests carried out using 2 processes which make use of the crystallization effect of MAP (Magnesium Ammonium Phosphate) revealed a phosphorus recovery exceeding 90%. The practicality of these processes can be established from the fact that the recovered phosphorus can be reused as fertilizer. The other 3 processes which make use of the crystallization effect of HAP (HydroxyAPatite) were found to significantly reduce the phosphorus concentration (down to a few milligrams). A study is underway on using the recovered HAP as a substitute for phosphorus ore. All in all, the 5 processes revealed that they effectively contributed for prevention of water contamination, as well as for resource recovery.

Phosphorus recovery, Crystallization, Magnesium ammonium phosphate, Hydroxyl apatite, Sewage, Fluidized bed, Fixed bed, Complete mixing, Scale, Anaerobic digestion sludge

Development of a Serially Cascaded Type, Direct Connecting Booster Pump System

by Yasutaka KONISHI, Kazuhiro KANEDA, & Sachiko MIYAUCHI

A novel booster pump system has been developed for high-rise buildings. This system, approved by the Bureau of Waterworks, Tokyo Metropolitan Government, features easy maintenance and a suppression effect for booster pressure fluctuation. Communicative linkage between 2 differently located booster units works effectively to optimally control pumping to different floors.

Serially cascaded type, Direct connecting booster pump system, Communication system, Booster pump, Communication panel, Pressure fluctuation, High-rise building, Booster pump system

Model EV-S Series Dry Vacuum Pump

by Kazuma ITO, & Katsuaki USUI

An energy-saving and small-footprint dry vacuum pump has been developed to meet the demand in semiconductor and liquid crystal panel manufacturing plants. Such demand includes saving in utility (power, cooling water and nitrogen consumption) costs as well as space-conservation (small-footprint). This pump series features considerable saving in utility costs by compression power reduction and motor efficiency enhancement. A small footprint feature has also been achieved by making the pump compact and improving the instrumentation layout.

Dry vacuum pump, Vacuum, Energy-saving, Small-footprint, Semiconductor, Liquid crystal panel

Power-saving Model EV-S Series Dry Vacuum Pump for the Semiconductor Manufacturing Industry

by Hideo OSATO, & Yoshihiro KASAHARA

Ebara's concern over environmental measures, in particular against global warming, has led to our development of a novel power-saving dry vacuum pump series for the semiconductor manufacturing industry. As this series enables an 83% saving in energy consumption, it is expected to replace conventional models used in this industry. Enthusiastic promotion for this product is currently underway.

Greenhouse effect gas, Semiconductor, Manufacturing equipment, Dry vacuum pump, Energy saving, Replacement proposal

Outline of New Ebara Plant in Futtsu City

by Toshiyuki OGAWA, & Satoshi INOUE

A new plant for manufacturing large-scale and high pressure custom-made pumps has started off in Futtsu City, Chiba Prefecture. This plant has replaced Haneda Plant as the production hub of Ebara's fluid machinery and systems. The main targets in its planning stage had been to enable manufacturing of high-value added and competitive products, as well as reducing running cost and lead-time. These have now become reality in this plant (overall area of 100000 m2) which had been swiftly completed in almost 2 years. Much is looked forward to this innovative plant which carries the legacy of Ebara's expertise in the pump industry.

Futtsu industrial site, Outline of construction and structures, New factory, Large-scale and high pressure custom-made pumps, Improvement in productivity, Large-scale manufacturing facilities, Performance test shop, Partership with regional communities, Futtsu district