Environmental Technology Adoption Track Record

Environmental Technology Adoption Track Record

The METAWATER Group develops and provides many technologies and products relating to water treatment and sludge treatment. We promote the development of technologies that not only ensure product safety and quality, but that also contribute to reducing environmental impact. As an industry leader, we contribute to society by providing products that meet the needs of the times. This section introduces the track record of adoption of our major products as of the end of March, 2021.

Environmentally-Friendly Product Development

Water treatment technology Safe water treatment systems that have also been designed to fight climate change

Ceramic membrane filtration system

Ceramic membrane filtration systems account for the largest share of water treatment system at water treatment plants in Japan that use membrane filtration systems. Since the risk of membrane rupture is extremely low, and these systems are also capable of eliminating protozoa, the safety of filtered water is high, and systems can be installed in tight spaces.
The extremely long membrane life keeps membrane replacement frequency to a minimum. In fact, the first unit of this system has been running for 20 years without replacing the ceramic membrane.
In addition, the ceramic material can be reused after the membrane is no longer used, leading to a significant reduction in waste.
Moreover, the pressure required to filter raw water is low, allowing water to be filtered using the difference in water level. This reduces the amount of power consumed by equipment such as pumps, which also contributes to energy saving.

Mobile water treatment plants that are active even during disasters

Ceramic membrane filtration system

In-vehicle ceramic membrane filtration system mounted on truck has a simplified ceramic membrane filtration system which is easy to operate and maintain. It can be moved from one place to another, allowing operators to manage operation even in areas where skilled technicians are not available. In areas where no water pipes have been laid, the system can be moved to various sources of water, such as lakes, rivers, or wells, where it can be used for treatment to produce safe drinking water.
Transporting water using water pipes requires a lot of energy, but this system itself can be moved, contributing to reduced energy required for transport.
And by leveraging the ceramic membrane's ability to stably filter high-turbidity raw water, the system is also used following disasters such as torrential rain or earthquakes.

Water treatment technology Water treatment system that reduces pollution of rivers and seas during rainy weather

High-speed rainwater treatment system

Combined sewer systems discharge primary effluent and untreated wastewater into public waters such as rivers during rainfall, which has a negative impact on water quality and public health at the discharge destination. As a result of revisions in 2004 to Ordinance for Enforcement of Sewerage Act, the "Combined Sewer System Emergency Improvement Project" was launched with the goals of (1) reducing pollutant loads, (2) ensuring public health safety, and (3) reducing the amount of gross solids, and measures to improve combined sewer overflow are being promoted all over Japan.
This system employs a specially-developed filter medium as small as 7.5 mm to filter primary effluent and untreated wastewater at high speed. By installing this system in the primary sedimentation tank of a sewage treatment plant or in a relay pumping station, gross solids and pollutants such as oil balls and plastics can be filtered (removed) at a filtration rate of 1,000 m/day.
In addition, since the existing primary sedimentation tank can be installed following modifications, and is easy to operate and maintain, it has been adopted as a measure to improve combined sewer overflow nationwide, contributing to the environmental conservation of public waters.

Water treatment technology No. 1 selling system boasting significantly reduced power consumption

Air diffusion system with highly-integrated configuration

Wastewater systems, which collect and treat domestic wastewater, consume 0.7% of Japan's total electricity consumption (equivalent to annual electricity consumption of 2.11 million households).
About 50% of this is used for sewage treatment in wastewater treatment plants (WWTP).
Wastewater treatment involves breaking down pollutants in sewage with microorganisms and removing them by allowing them to sink together with fine dirt. However, a large amount of air must be blown into wastewater (diffused air) in order to activate the microorganisms.
METAWATER has developed a system for diffusing ultrafine air by applying ceramic technology, enabling high oxygen transfer efficiency. In addition, by reducing pressure loss during air injection, the amount of power required can be reduced by approximately 30% compared to conventional systems.
This system is maintenance-free and has a long service life, and boasts the largest share of the Japanese market.

Thermal processing technology Thermal processing technology that converts waste into fuel

Wastewater sludge fuel system

Sewage sludge in urban areas is typically dewatered to reduce moisture before being incinerated. Ash generated after incineration is used effectively in materials such as raw material for cement.
METAWATER's "wastewater sludge fuel system" is a technology used to manufacture fuel products (charcoal) by steaming, burning, and then carbonizing sewage sludge. Manufactured fuel products have sales value, and are effectively used as an alternative fuel to coal at thermal power plants.
There are high expectations for fuel from sewage sludge to be a new effective application for sewage sludge.

Resource and environmental technologies Improved sorting efficiency and accuracy for plastics

Non-industrial waste recycle treatment system

The amount of waste plastic generated in Japan is said to be more than 9 million tons per year, accounting for approximately 2% of all waste. China and other countries have imposed import restrictions on waste plastics, and marine pollution caused by microplastics has gained much attention as a major social and environmental problem. As a result, the importance of recycling and reusing waste plastics as well as controlling discharge has increased. However, in order to recycle waste plastics, it is necessary to separate lightweight items, such as plastic shopping bags, and heavy items, such as detergent bottles, as well as to remove gross solids by hand.
In an effort to improve the recycling rate of plastics, the METAWATER Group has for many years been developing equipment that uses the difference in specific gravity to improve the efficiency and accuracy of manual sorting.
In crushing and sorting facilities, the risk of explosion and ignition has been increasing due to contamination by spray cans and lithium batteries. In response to this, the METAWATER Group has developed a system for preventing the spread of fire (Patent no. 6148910 acquired in June, 2017) that quickly detects and extinguishes flames in the event of fire, thereby contributing to the safety of facilities. As of fiscal 2020, METAWATER had shipped approximately 300 non-industrial waste recycle treatment systems.