Technology Data

Possible Applications

It treats oil-containing wastewater certainly and stably by the advanced oil adsorption technology. In Japan, we have a track record of delivering the technology mainly for treatment of car wash wastewater at bus and taxi companies, train vehicle bases, hydroelectric power plants, etc. Since the treated water can be reused for car washes, etc., it has led to cost reductions for customers.
In addition to buses and taxis, in developing countries where trains are becoming the mainstream in transportation services, it is possible to secure valuable water resources and lead to water circulation by introducing the technology to buses, taxi car washes, vehicle bases, etc.

Fig. 3 Basic process flow of the treatment of oil-containing wastewater

Competitive Advantage

Compared to the conventional oil-containing wastewater treatment agents made of polypropylene, DiaFellow™ DM is a granular composite of organic polymer and inorganic compound. The adsorption capacity to oil has significantly improved compared to conventional products. In addition, conventional products could not be backwashed because they float in water, but DiaFellow™ DM can be backwashed because they sink in water.

According to the actual operation data of DiaFellow™ DM, the power consumption was reduced by 35% from 79 kW to 51 kW when compared to the conventional process. Furthermore, the amount of chemicals used has significantly decreased by 98% compared to the conventional one.

Performance

In the current situation where oil-containing wastewater is released into rivers by conventional method or without a proper treatment, environmental pollution is easily imagined. On the other hand, compared to the conventional pressurized flotation process, it has been found that the introduction of this system reduces n-hexane extracts such as mineral oil to about 1/10, directly reducing the environmental burden. With this water quality, it can be reused as washing water or released into rivers, contributing to environmental conservation.

Plant specification

Power supply: 2-5kW（Average power consumption）
Treatment capacity: 3 – 40 m3/h
Replacement cycle of DiaFellow™ DM: 1～3years
Auxiliary: activated carbon adsorption tower, pH adjustment tank (hypochlorous acid or sodium hydroxide is required)

Case of introduction

1. Railroad rolling stock base wastewater treatment
   　Capacity：24m3/d　Mineral oil　 Raw water：45mg/L
   　　　　　　　　　　    Treated water≦2mg/L
   　　　　　　　　　　　 Discharge standards：≦5mg/L

2. Bus car-wash wastewater recycling
   　Capacity：5m3/h　 Mineral oil　 Raw water：7mg/L
   　　　　　　　　　　　Treated water：≦3mg/L

3.Automobile maintenance factory wastewater recycling
　     Capacity：4m3/h　 Mineral oil　 Raw water：50mg/L
　　　　　　　　 　　       Treated water：≦3mg/L

4.Compressor drainage treatment
　     Capacity：3m3/h　 Mineral oil　Raw water：100mg/L
　　　　　　　　　　　　  Treated water：≦5mg/L

Technical Maturity / Past record of introduction

The wastewater treatment systems utilizing DiaFellow™ DM are installed at over 1,200 sites in Japan as of December 2020.
・Power plants   684 projects
・Industrial　　  431 projects
・Trains 　　　     72 projects
・Buses　　　      61 projects
・Taxis and, etc.  21 projects

The capacity ranges from 0.9m³/h～25m³/h for our past experiences.

Information on patent related to this technology

N/A

Company Data

International Operation

Modality of business transaction

Partnership
We are looking for a local business partner or a distributor who would actively support promoting and installing our technology and product.
When we find a potential partner(s), we will transfer the technology, necessary for the work above.

Export of product
We can export our products to clients overseas. Even in this case, we will provide necessary assistance through the remote monitoring system.

Schematic illustration of the technology