Environmental Systems : Sewage Treatment Systems

Every year, the level of environmental damage from rising global populations is increasing. This is attributable to the growing volume of sewage generated and the deteriorating quality of sewage from urbanization and industrialization throughout the world.

In order to address these problems, various processes and systems are being employed, as all wastewater differs in composition and concentration.

Hitachi Plant Technologies offers a wide variety of advanced technologies to remove nitrogen and phosphorus in the treatment of sewage.

Typical System Flow

Our Product Line

Features

As screenings and grit are transported through piping, no foul odors are generated as sewage and filth are safely contained. Waste products are transported while being mixed and agitated with pressurized water. This sanitary method maximizes cleanliness.

By switching the pressure water valve, the jet pump can automatically transport refuse and lift grit from a multiple number of tanks.

Settling Tank Facilities

Collector

• Flight chain type
• Reciplo type
• Circular type

Aeration Tank Facilities

Sludge Dewatering Facilities

• Digestion Facilities
• Thickening Facilities
• Dewatering Facilities

Methane gas is a by-product of sludge digestion. If released into the atmosphere, it contributes to global warming. However it is also a rich source of energy. Our Digestion Facilities incorporates a gas tank which collects and stores the methane gas emitted for reuse in heater boilers and gas power generators, reducing damage done to the environment and lowering your energy costs.

Dewatering facilities mechanically dehydrate concentrated sludge and digested sludge. These facilities considerably reduce the amount of sludge discharged from treatment systems.

• Screw Press type
• Belt Press type
• Centrifugal type

Oxidation Ditch System

The oxidation ditch system performs biological oxidation of organic substances through simultaneous circulation and aeration of wastewater by an aeration unit installed in the circulation ditch. This system can be easily maintained because it is mounted above the oxidation ditch, increasing treatment reliability over time, regardless of changes in the amount and quality of incoming sewage.

Multi-function Building Drainage Tank Aerator

A multi-function machine that simultaneously aerates, agitates and crushes scum, to prevent scum and odors in a building wastewater tank.