Company data

Name	Sekisui Aqua Systems Co., Ltd.
Address	1-1-30 Oyodonaka,Kita-ku,Osaka 531-0076,Japan
Capital	200 million yen
Contact person	Name：Yoshiharu Matsubara Telephone/Fax： 06-6440-2601/ 06-6440-2606 E-mail： matsubara006@sekisui.jp
Number of employees	160
Date of company foundation	March 3 ,1964
The type of business	Engineering

International operation

Number of employees for international operation(including overseas operation, if any)		1 staff
Overseas offices*	City , Country	Name of company
	N.A.	N.A.

* Overseas offices of alliance members and/or consortium members are also accepted.

Modality of business transaction

Mark, if applicable	Mode of business	Brief description
	Direct Investment	For local production
	Partnership	J.V. with local company for local production
	Export of product
	Licensing of patent

Technology data

Name of technology	Rotating Biological Contactor and ESROTAE
Field of the technology	Major category B	Sub-category 4, 5
Conceivable applications	Industrial Waste Water Treatment Domestic Waste Water Treatment Lake and River Purification
Performance	BOD removal ratio above 90% Processing capacity: 40m3/day (Raw Water)
Technical maturity	Rotating Biological Contactor was developed in 1980 More than 1,000 units have been installed ESROTAE was developed in 1999 in Japan More than 200 units have been installed
Competitive advantage	Low Power Consumption （less than 60%） Low Sludge Generation （less than 65%） （In comparison with Conventional Activated Sludge Method）
Conceivable risk
Information on patent related to this technology	(Japan) No.3183727 ,No.3851399 ,No.3895818 ,No3593270 (USA) No.6783669 (Indonesia) No.ID0017362

Schematic illustration of the technology

(Rotating Biological Contactor)

(ESROTAE TYPE II)

ESROTAE

Cubic latticed contactor/material: polypropylene (using waste plastic)

Microorganism on the surface of a cubic latticed contactor

Products Introduction

Realizing amazing high microorganism body density

SEKISUI's advance plastic molding technology and long-developed hardware and software technology for rotating biological contactor equipment were combined in order to develop wastewater treatment technology and the epoch-making cubic latticed contactor.
The wastewater treatment equipment ESROTAE provides stable and effective wastewater treatment while conserving space and energy and at a reduced initial cost.

Principles of ESROTAE

This system purifies wastewater using a microbial film adhering to a cubic latticed contactor. The contactor slowly rotates with approximately 40% of surface area submerged in the wastewater. Oxygen is absorbed from the air and pollutants from the wastewater and the pollutants are aerobically decomposed. While new microorganisms continuously increase on the disks, old microorganisms with decreased activity drop off the disks.

Features

Wastewater can be effectively purified due to the large surface area.

• Large surface area during operation

  Because the basic form of the cubic latticed contactor is a small cylinder, as load increases, the biological sludge thickens and surface area increases.

• The projecting structure can provide a large amount of oxygen

  The rotating movement of the projecting structure toward the axis of the cubic lattice creates aeration by crashing into the water surface and the whirlpool phenomenon.

• Large contact effectiveness

  As the whole cubic latticed contactor has permeability, sewage can flow freely toward the axis through the lattice without any dead space. The whole contactor functions effectively.

• Abundant biological sludge along with macro substance transportation
  (Fluctuating biological sludge and fluid biological sludge)
  
  
  

  Loading by crane

  
  
  

  Main unit of ESROTAE type II

  By the lay and direction of the axis, local turbulence is created and only molecular diffusion is needed for substance transportation for fluctuating biological sludge and fluid biological sludge, along with macro substance transportation. Substance transportation to the fluctuating biological sludge and fluid biological sludge formed on ESROTAE is exponentially larger than molecular diffusion and has a high efficiency in wastewater treatment.

• Treatment standard can be freely set

  Since the treatment standard can be freely set, it is ideal for pretreatment in existing activated sludge methods and sewage exempt facilities.

  • Wastewater can be stably treated within the range of 200-600mg/L BOD concentration.
  • Investment (facilities/land) that accompanies increased production can be kept to a minimum and the water treatment capability of an existing facility can be improved.
  
  
  

  Due to the compact structure of the units, space can be effectively used
  by 2 stories arrangements and platforms.

• Quick delivery

  Main parts of ESROTAE are in stock. Delivery can be made in approximately one month.
  
  Some types have deposition tanks. (special edition)