Remediation of Soil and
Groundwater Contaminants
Halogenated Organic Compounds (VOCs)
Petroleum Hydrocarbons(BTEX, TPH, etc.)
Cyanides, Dioxane, Heavy Metals
Pesticides, Dioxins, PCBs, etc.

http://www.ecocycle.co.jp

Business Description
Site Investigation
 Provide services for detailed site investigations on the extent ofcontamination and hydrogeology with cutting-edge investigation tools
such as MIP(Membrane Interface Probe) to reduce remediation timeand costs.
(Certified by the Ministry of Environment: 2014-3-17）

Remediation of Soil Contamination
 A group of interdisciplinary scientists and engineers from the fields ofbiotechnology, chemistry, geotechnical and civil engineeringcollectively focus on delivering the best solutions to the client.
 In-situ Bioremediation, chemical oxidation, and heavy metalstabilization, or a combination of these technologies are proposed asneeded, in consideration of the site conditions and target goals.
 Target contaminants: VOCs, SVOCs, Pesticides, Heavy metals,
Cyanides, Petroleum hydrocarbons, etc.

Manufacturing and sales of remediation products We have been developing and manufacturing the remediation products
at our factory.
 We have a lineup of various products such as EcoClean series to purify
VOCs contamination, EcoClean-M for heavy metals contamination, andGreen Clean series for petroleum hydrocarbons and cyanide
contamination.
 We manufacture these remediation products at our factory in Japan by
careful quality control standards and delivered to our customers.
 In addition, we have a wide range of remediation products that are best
suited for site remediation such as chemical oxidants, heavy metalstabilizing products, etc. targeting various contaminants.

Water Treatment
 Provide water treatment technologies for contaminated groundwater,
factory wastewater and wastewater of civil engineering works basedon coagulation precipitation, membrane filtration, adsorption andion-exchange, etc. to meet environmental discharge limits.
 These water treatment technologies are for heavy metals (hexavalentchromium, Selenium, Mercury, Cyanide, Arsenic, Fluoride, Boron, etc.),
Dioxins, 1,4-dioxane and Petroleum hydrocarbons, etc.

Geotechnical Investigation ground improvement
 We asses the ground characteristics accurately by through boring
surveys, surface surveys, soil tests, and in-situ tests.
 The ground improvement is made by injecting the solidified material toobtain the necessary ground strength for the foundation of the building
and liquefaction measures are taken.

333

The Technological Strength of EcoCycle
Awards for excellence in research and technological development in soil andgroundwater bioremediation

Vice Minister
Environment

The Environmental Minister Award (2017)

Kinki Bioindustries Award (2017)

Courtesy: National Institute of Environmental research,
Ministry of Environment, Nikkan Kogyo Shimbun

Patents Awarded in Japan and Overseas（Taiwan, USA and India)

Technical team comprising Engineers and Scientists
We are working on the development of state-of-the-art remediation solutions with our bioremediation products andtechnological applications effective for cleaning various soil and groundwater contaminants. We have a team ofscientists and engineers from various disciplines analyzing the problems with interdisciplinary expertize providing
appropriate site remedial design and implementation.

List of Qualifications：
4 Ph.Ds (Biotechnology, Chemical Engineering), 2 Construction Engineers, 1 Technical Engineer in Applied Science, 3 Technical Assistants, 4Soil Contamination Investigation Technology Managers, 3 Soil Environmental Supervisors, 10 1st Class Civil Engineering Construction
Management Engineers, 6 Secondary Civil Engineering Management Engineers, 4 Soil Environmental Protection Engineers, 1 Site Assessor
Skill Certification Trainer, 3 Soil Environmental Risk Managers, 1 Noise Pollution Prevention Manager, 1 Dioxin related Pollution Control
Manager, 2 Water Pollution Control Managers, 1 Surveyor, 4 Geological Survey Engineers, 1 Ground Quality Test Manager, 1 Geological
Information Manager, 1 Environmental Weighing Engineer, 1 Septic Tank Equipment Engineer, 2 Divers, 2 Ground Protection Engineers, 1Class A Dangerous Goods handler, 2 Type B dangerous goods handlers, 1 type 1 hygiene manager, 2 Organic Solvent Handling Managers, 2Specific Chemical Substances Operation Managers, 3 Oxygen Deficiency Risk Managers, 1 Oxygen deficiency/hydrogen sulfide hazard work
manager, 1 Explosive handling Safety Supervisor, 1 Chief of Ground Excavation, 1 Civil Engineering Operating Officer, 1 Construction of
Scaffolding Manager, 1 Construction Machine (Leveling, Transportation, Loading, Drilling) Operator, 1 Construction Machine operator forfoundation work, 4 Boring Machine Operators5 Slinging1 Mobile Crane Operators, 5 Low Voltage Electrical Operators, 2 Drivers of Highaltitude work machines, 2 Roller Operators, and 2 Gas Welders.

4Overseas Support

 Laws on soil contamination are getting stricter overseas as well.
Support on
 In some cases, site remediation is necessary before the closure or relocation ofremediation of soil
overseas factories.
contamination
 There is a risk of soil contamination when conducting land trading, M & A, etc.
overseas.

Provide Solutions● We have multiple overseas offices and networks.

● We can also support overseas governments by utilizing our locally-trained consultants, who arefamiliar with local environmental laws.
● We can provide on-site remedial solutions by our extensive experience and know-how from a variety
of sites remediated in Japan and overseas.

Business Network<Tokyo> Headquarters<Shanghai>
EcoChem(Shanghai) Environmental Technologies Co., Ltd. （ECET）<Taipei>Nissho Environment Restoration Co., Ltd.

Head Office, Subsidiary

5

Sales OfficePartner Companies

Brownfield Solution
Relocation, closure or partial sales of defunct factories is a bottleneck due to soil contamination
Bottleneck in developing former manufacturing facilities;● Wanting to sell the old factory/land, but not finding the buyer because of soil contamination.
● The remediation cost is too high compared to land cost thus making it difficult to decide.
● Not sure if the land can be sold at market price after the remediation.

Brown-Field Solution
Provide total solutions for site redevelopment from contaminated and abandoned facilities

EcoCycle
Major Real estate
Developer

Major Trading
Company
Demolition Contractor

Buy contaminatedland and factory

Soil contamination
investigation andremediation

Dismantle thefactory

Real estatedevelopment

Guaranteeing Remediation
EcoCycle guarantees remediation of contaminated sites with cost cap insurance

Flow of site remediation guarantee
Grasp the site contamination conditions
Site investigation to discover contamination and hydrogeology

Studies on remediation selection and performance
Selection of remedial alternatives and developing conceptual model

Determine remediation goal, scope of guarantee

Insure for site remediation

On consultation we decide the remedial target. In addition, we clarify the acceptance conditions
and the scope of remedial guarantee

Full-scale remediation and contaminants monitoring
Implement full-scale site remediation followed by groundwater, soil monitoring.

Achieve the target goals within your budget
6

List of EcoCycle Remediation Products

VOCs
Contamination

Tetrachloroethylene, trichloroethylene, trichloroethane, carbon
tetra chloride, dichloroethylene, dichloromethane, vinyl chloride,
chlorobenzene, etc.

Product Name

Application overview

EcoClean and EcoClean-E …
Anaerobic biostimulants for VOCs and effective for siltclay soils, coastal areas, etc.
EcoClean

EcoClean-E

EcoClean-ZVI…

It is a mixture of biostimulant and Zero valent Iron
EcoClean-ZVI

Effective for high contaminant concentrations and as apermeable reactive barrier (PRB)

EcoClean-X

Anaerobic biostimulant for degradation of chlorobenzenes,
chlorophenols, etc.

BioFlush-X

In-situ flushing agent for VOCs, petroleum hydrocarbons

COA-X

In-situ chemical oxidizing agent (sodium persulfate) for
VOCs, 1,4-dioxane, mixture of complex organic
contamination (VOCs and petroleum hydrocarbons), etc.

Heavy Metal
Contamination

Hexavalent chromium, Mercury, Lead, Cadmium, Arsenic, Selenium,
Fluoride, Cyanide, etc.

Product Name

EcoClean-M

Application overview

Biostimulant for heavy metal stabilization of Hexavalent chromium,Cadmium, Mercury, Lead, Arsenic, Mercury, etc.

NanoLite Earth

Heavy metal stabilizing agent for Cadmium, Lead, Chromium,Arsenic, Mercury, Selenium, Copper, Zinc, Nickel, Fluoride,
Cyanide, etc.

7

List of EcoCycle Remediation Products

Petroleum Oils,
CyanidesContamination

Benzene, toluene, ethylbenzene, xylene, gasoline, kerosene, diesel oil,heavy oil, aromatics, cyanide compounds, PAHs, chlorobenzenes,
chlorophenols, vinyl chloride, 1,4-dioxane, etc.

Product Name

Green Clean-PH

Application overview

Biostimulant for aerobic degradation of benzene, gasoline,
kerosene, diesel, light oils, etc.

Biostimulant for Aerobic remediation of cyanide compounds
Green Clean-CN

Green Clean-X

Biostimulant for aerobic degradation of dichlorobenzene,
chlorobenzene, etc.

OleoBact

Effective microorganisms to degrade high concentration of
petroleum hydrocarbons (benzene, kerosene, diesel, light oils),
etc.

HAR-OX

An oxygen releasing agent that release dissolved oxygen
essential for aerobic remediation of contaminants.

COA-X

In-situ chemical oxidizing agent (sodium persulfate) for
petroleum oil degradation (benzene, kerosene, diesel, lightoils), etc.

NitrateContamination

Nitrate and nitrite compounds, etc.

Product Name
EcoClean-N

Application overview

Anaerobic biostimulant for nitrate and nitrate remediation

8

Extensive Site Remediation Experiences
Our clients range from large multinationals to local andcentral governments
Electric and Electronic
Power Plants
Petrochemicals

Automobile

Heavy Industry

Overseas Projects

Precision Tools

Chemicals, Pesticides

Metal Plating, Surface cleaning

India

Textile Cleaning

Representative Clients
MM Building Materials Co. Ltd.
Konoike Group Co., Ltd.
Nippon Steel Sumikin Engineering Co., Ltd.
Takenaka Corporation
Takenaka Civil Engineering Co., Ltd.
Hitachi Plant Service Co. Ltd.
Mitsui Construction Road Co., Ltd.
Mitsui Sumitomo Corporation
Mitsui Bussan Chemical Co., Ltd.

Taiwan>500 Sites
USA

Experience in variety of site conditions

Government Site Remediation Projects
 Adopted as low-cost, environmentally friendly remedial technology for site clean up (Test
Results published, November 2005).
 Site remediation was completed at flower garden area of Fukuoka Kitakyushu Expressway
Corporation(June 2006).
 First of its kind, “Subsidy from soil contamination remediation fund” from the Ministry ofEnvironment, (December 2007). This site was confirmed free of contamination (1st November2011).
 Adopted for contaminated site remediation at illegal dump site at Iwate-Aomori prefecturalborder (March 2009).

9

Site assessment &investigation to grasp theextent of contamination

Obtain additional site
investigation data for remedial
design and development

Site
Assessment••

History of Hazardous Chemicals
Use, Storage, Leakage, etc.
History of Land Usage by
Surrounding Facilities•

What weknow•

Possibility of Sitecontamination
Area mapping forSite Investigation

ImportantDetailed
Investigation•

Understand Contamination & Geological
Features【Contaminant Distribution】•••

Contamination source (Hot Spot) & Pathway
Contamination Distribution Against Depth and at
Vadose Zone, around groundwater level.
Other site conditions【Hydrogeology】

Site
Investigation••

Surface Soil Investigation, Soil Gas
Analysis
Investigation of groundwatercontamination by the existing
monitoring wells•
What weknow•

Extent of contamination(planar)Type of contaminants,
concentrations, etc.

••

Presence of clay lenses & distribution oforganic matter
Soil permeability, hydraulic conductivity, etc.

【Validation of influencing parameters】･ORP, PH, co-contaminant, buried objects, etc.
•
What weknow••

Appropriate remedial
options
Estimation ofremediation cost
Other data required forfull-scale remedial
design and execution

EcoCycle Registered under the Designated Authority.（Ministry of Environment 2014-3-17）● We believe that detailed site investigation is key to successful site remediation ●Why is a detailed site investigation required ?
Detailed site investigation by advanced methods such as MIP provide in-depth
knowledge of contamination distribution and site hydrogeology. This helps us to develop
the best remedial design while minimizing remediation time-frame and total costs.
MIP (Membrane Interface Probe)

3D Distribution of Contamination

MIP is a Real Time Site Investigation Tool

Source: ISS Corporation

10

Feasibility of Remedial
options are evaluated in
the Laboratory

In-situ pilot test for
obtaining site data for fullscale remedial design

Full-Scale Site
Remediation！

Field
Test

Remedial
DesignOptionLaboratory
Test
Soil & groundwaterobtained from the site is
tested in the laboratory
with various remediation
options (2~4months)••
What weknow••

Remediation
options
For
Bioremediation：
Microbial growth &degradation rates
For chemical
oxidation：Productdosage,degradation rates
Other factors•

In-situ pilot test is carriedout to know theeffectiveness of selected
remedial technology&and to collect data forfull-scale remedial
design••What we •know

Effectiveness of
selected remedialtechnology
Site cleanup cost
and time-frame
Trouble shootingin the field→ For full-scale
remedial design &cost estimation

Special injection techniques are applied based on the site hydrogeology and•Based on the site
investigation and field pilot
test data, full-scale
remediation design andimplementation plan aredeveloped, including
remedial goals, cost, schedule,monitoring, etc.

Remedial
Implementation

Remediation of
Chlorinated compounds
Page 12〜13
Remediation ofPetroleum
Hydrocarbons, Cyanides

contamination circumstances to distribute remedial agents evenly
throughout the target area for effective remediation

Page 14〜15
Remediation of Heavy
MetalsSpecial Injection TechniquePage 16〜17

Depth（ｍ）•

Explanation to
the Government
authorities

Sorbed Mass

We will carefully
support until
successful Site
Remedial Agent（Image）

11

remediation

Remediation of ChlorinatedCompounds
In-situ Bioremediation (Biostimulation)
Bioremediation is an environmentally friendly remedial technology where indigenous microbes are stimulated by injecting
proprietary biostimulants such as EoClean. These microbes degrade toxic compounds into harmless water and carbon dioxide.
The EcoClean series of biostimulants applied here for bioremediation are made of food materials and consist of amino acids,
vitamins, etc. and are environmentally safe and biodegradable.

Image of in-situ Bioremediation
Bioremediation Products● Short remediation time
● Degrades high contaminant concentration● Environmentally friendly and high safety● Cost is approximately 1/3 that of dig and dispose● Field implementation with simple equipment

MeritsInjection

EcoClean-E

EcoCleanZVI powder with Biostimulants
Purified groundwaterContamination

Groundwater
Flow Direction

EcoClean-ZVI

Nutritional
SourceActive Microbial
Zone
For ContaminantDegradation

Degradation Pathway of Tetrachloroethylene
Tetrachloroethylene

Trichloroethylene

Dichloroethylene

Vinyl chloride

PCE

TCE

DCE

VC

Ethylene

Harmless
byproducts
CarbonDioxide,
Water

Total Cost Comparison Chart of Bioremediation vs Pump and Treat● Target Area: 3,000m2, Target Volume: 25,500m3, Groundwater level: 1.5m bgl● Contaminants: Tetrachloroethylene, trichloroethylene, & dichloroethylene● Concentration: 0.5mg/l (Total VOCs)700

EDC Remedial Method
Cost of Bioremediation With
1 Year Site Cleanup Target

Total Cost Reduced by About 350 Million JPY ！

Total Cost (Million JPY)

600
500

Bioremediation iscompleted here！

400

Cost of Bioremediation With
3 Year Site Cleanup Target(Cumulative)

Pump and Treat is ongoingwith additional costs

Pump & Treat

300
200

Initial Capital
Investment Costs (Cumulative)

100

Equipment Renewal Costs(Cumulative)

0
1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

（Years）

Running Cost (Cumulative)

Even with pump and treat applied for many years, it will be difficult to reach the target minimum environmental standards. With bioremediation the target is easily met.

12

● Representative Target Contaminants
Haloginated organic compounds such as tetrachloroethylene, trichloroethylene, trichloroethane, carbon tetrachloride,
dichloroethylene, dichloroethane, dichloromethane, chloroethylene(vinyl chloride), chlorobenzene, etc.

In-situ Bioflushing
Bioflushing is an appropriate and quick remedial measure targeting high concentration/complex contaminated source areas andadsorbed to soil particles. Injection of bioflushing agents dissolve the soil adsorbed mass and contaminants are then extracted andtreated off-site. The residual subsurface concentration in subsurface is treated by in-situ bioremediation reducing the cost and theremediation time.

Suitable site•

Bioflush injection unit

Water treatment
facility

Sorbed Mass

Permeable layer

Sorbed contaminants(VOCs, etc.)

Soil

Magnification

Poorly water soluble
contaminantHigh contaminantconcentration•

Image of soil cross-section
Groundwater flow
Bioflush-X

Aquitard

Bioflush-X

In-situ Chemical Oxidation
This is a method to degrade contaminants by oxidizing agent (Persulfate, Fenton, etc.). Chemical Oxidation is a preferred
method to treat high concentration contaminants and complex contaminants with short-term remediation goals.

Suitable site

Chemical Oxidant

Short-term remediation goal
Good hydraulic conductivity
Complex contamination such as VOCs, Benzene, TPH
Contaminants in vadose zone
Less effective in silty soils & high organic matter

•
•
•
•
•

COA-X

Other Remedial Techniques● Lime mixing treatment● Containment

Here, contaminated soil is mixed with lime to raise soil
temperature and evaporated VOCs are collected and treatedby activated carbon. Additional soil heating enhances theevaporation of VOCs, SVOCs.

A wall is installed in a grout of steel sheet piles in the target areaby shutting down groundwater flow for avoiding health risk.

Suitable site

Suitable site

Vadose zone contamination
To meet short remedition time

•
•

•
•
•

● Soil vapor extraction

Volatile organics in the vadose zone are extracted and treated•

Suitable site•••

Factories and buildings under operation
For vadose zone soils

13

To avoid urgent spread of contamination
Concentration is below the secondary elution standard
When contaminated site is large and not economical toclean
Not able to do remedial works due to factory
circumstances
To prevent external contamination

Remediation of Petroleum
Hydrocarbons, Cyanides, etc.
In-situ Bioremediation (Biostimulation)
Green Clean is a nutrient source for aerobic microorganisms
Green Clean is a nutritional supplement for indigenous microorganisms capable ofdegrading contaminants such as petroleum oils, cyanides, etc. Green Clean is injectedalong with a dissolved oxygen source required for aerobic microorganisms.

Suitable site
•
•
•
•
•

BTEX, light oils, etc.
For low concentration of contaminants and wider plumes.
Overburden saturated zone
Low cost in-situ remedial alternative
Good at active facilities/factories or under the buildings

H2O

Green Clean-PH

BenzeneGreen Clean-CN

CyanideCompounds

Green Clean-CL

Mono, dechlorinatedcompounds

Green Clean-X

1,4-dioxane

H2O

Gasoline Station
High concentration dissolved
oxygen injection unit

Green Clean
nutrients tank

Saturated layer

Contamination

Oxygen releasing
Agent, HAR-OX}

Harmless byproducts

Alternative methods of creating
aerobic conditions are air
sparging, oxygen releasing
agents, etc.

Green Clean＋
Dissolved oxygen

Groundwater flow
Microbial consortium

Microbial activation

Aquitard

Bioremediation (Bioaugmentation)
OleoBact

Oleobact is an effective microbial consortium that is injected into the subsurface
or mix with excavated soil to expedite the contaminated site remediation whereindigenous microorganisms are not capable of degrading high concentrations or
to reach faster remediation goals.
••

Product is registered in US EPA National Emergency Responsive Plan Product
Inventory.
Registered in the Ministry of Land, Infrastructure and Transport, (NETI), Japan■ Case studies

Number of sites：applied at over 100 remediation sites in Japan
Contaminants：BTEX, gasoline, kerosene, diesel, heavy oil, lubricating oil, etc.
Target area：Implementation in the range of 10m2 ~ 2,500m2

14

● Target Contaminants
Benzene, toluene, ethylbenzene, xylene, gasoline, kerosene, light oil, heavy oil, poly aromatic hydrocarbons (PAHs), cyanide
compounds, dichloroethylene, chloroethylene(vinyl chloride), 1,4-dioxane, etc.

Chemical Oxidation
This is a method to degrade contaminants with oxidizing agents (Persulfate, Fenton, etc.). Chemical oxidation is a preferred
method to treat high concentration and complex contaminants with short-term remediation goals.

Suitable site
•
•
•
•
•
•

Petroleum hydrocarbons
Chemical Oxidant
Low to moderate contamination
Applicable for vadose zone and saturated
layersMixture of complex contamination such as
petroleum hydrocarbons and VOCs
Shorter cleanup target
Less organic matter in soils
COA-X

Suitable for
remediation ofgasoline stations,etc.

Ecothermo flush
Soil contaminated with petroleum hydrocarbons is mixed with Green Clean-X by creating biopile and aerobic condition are met bysucking air into the pile. This process stimulates native aerobic microflora and the temperature of the pile rises steadily. Once thetemperature crosses 50 degrees centigrade, thermophiles kick into action to degrade target contaminants.
Applicable for contaminants that are difficult to degrade at room temperatures.
Thermophilic bacteria
degrades difficult to
Contaminated soil
degrade contaminants
Suitable site
by normal bacteria• BTEX, Fuel oils (gasoline, kerosene, diesel, heavy oil) , PAH, VOCs, etc.
• Contaminants found under vadose zone, and silt/clay soils.
• For higher contaminant concentrations.
Volatile• Site is accessible for excavation & ex-situ treatment.

55℃ ～contamination

Source of nutrition

Aeration

Bioflushing
Cyanide contaminants (ferri and ferro cyanides, etc.) are produced during coal gasification. Most of these compounds are notsoluble in water and are persistent in soils. Bioflushing agents are injected into those soils and in this process soil adsorbed
metal-cyanide mass is dissolved in groundwater followed by pump-and-treating the dissolved phase. Subsequently,
bioremediation is applied to remediate remaining residual contamination in subsurface.

Suitable site•••

Cyanides that are difficult to degradeThose which are difficult to dissolve in water
Other compounds, dioxins, etc.

Extract

Bioflushing
agent tank

Flushing agent

Contamination

Groundwater flow
direction

Aquitard

15

Remediation of Heavy Metal
Contamination
Metal Stabilization Technology
NanoLite Earth is a material that stabilizes ionized and soluble metals in soil and groundwater, making them insoluble in soil-water
systems and preventing the elution of heavy metals into the groundwater. This product is applicable for most metal contaminants.
This material is made from natural minerals, and/or biostimulants. Unlike cement based stabilizing agents, Nanolite Earth doesn't
impact natural soil properties as the pH of treated soil is near neutral.

NanoLite Earth
Nanolite Earth design dosage depends on types of metals and its concentrations

Barrier
建全な地下水砒素等の重金属
含有地下水

不透水層

Surface soil treatment

Barrier application by trenchContainment
Containment enclosures of sheet iron or concrete walls are made in order to shut-off contaminated groundwater flow to thesurrounding areas. Here, a high quality concrete or iron wall is being made around the target area, blocking contaminatedgroundwater flow.

Pavement
Concrete (>10cm)
難透水層
Asphalt (>3cm)

To prevent rain water
infiltration

Impermeable wall

To arrest groundwater flow

Monitoring well

Monitoring well

Contamination

Groundwaterlevel

Make sure there is nowater level rise

Make sure there is no
groundwatercontamination

Groundwaterflow direction
Source：Soil Pollution Prevention Guidelines for SMEs (Environment Bureau,
Tokyo Metropolitan Govt.)

Source：TRD Construction Association Website

Merits of TRD Construction● Effective method of containing contaminated groundwater, useful or waste disposal facilities, etc.
● A low cost TRD wall is made from drilled soil from the site mixed with cement-like materials.
● Construction of homogeneous TRD with hard surface and cobblestone layer with excellent continuity.
● Applicable Soil: N value <100, gravel size <100mm, wall thickness: 450~850mm, and applicable depth up to 60m

16● Target Contaminants
Hexavalent chromium, selenium, uranium, mercury, led, cadmium, arsenic, fluoride, cyanide, etc.

Soil Washing
Most of the heavy metals are adsorbed to fine particles due to large surface area. By separating the fine particles from the soil
contamination with water wash largely minimizes waste disposal volume of soil.
Contaminants areadsorbed to fineparticles of soil

Particle sizeclassification
by water wash

Particles that absorb
Contaminants separated

Heavy Metal Soil Washing Equipment

Contaminants

Soil cleaning with chemicals/solvents
Depend on the type of heavy metal contamination and concentration, the removal rate may vary by water wash and some times
may not reach to target levels. Thus, the contaminant removal rate can be increased by washing soil with chemicals/solvents.

Bioremediation
EcoClean-M is a proprietary biostimulant injected into a heavy metal contaminated subsurface to stimulate indigenous
microorganisms, including sulfate reducing microorganisms . The reduced sulfate forms sulfide which reacts with soluble heavy
metals to form insoluble sulfide minerals. On the other hand, hexavalent chromium is biologically reduced to trivalent chromium.

● An Image of Groundwater remediation by EcoClean-M

EcoClean-M
Heavy Metals Soluble in
Groundwater

Insolubilized Heavy
MetalsSoil Particles
Filtered by
Soil
Particles

Groundwater Flow
Minerals Present in Soils

Activation & Propagation
Of Microorganisms
Precipitation

CleanedGroundwater（Example）
Hexavalent chromium
Water soluble Lead
Water soluble Cadmium
Water soluble Arsenic
Water soluble Selenium(VI)Biological
Reduction

Trivalent chromium
Lead Sulfide
Cadmium Sulfide
Diarsenic Trisulfide
Iron Arsenate
Selenium（0）Solubility Products

6.3x10-31
8.0x10-28
8.0x10-27
2.1x10-22
5.7x10-21（The solubility product is smaller, watersolubility of metal is more difficult）

17

Metals are further
covered by minerals
resulting very strong
metal stabilization(Co-precipitation)

Water Treatment Technology
EcoCycle provides wastewater and groundwater treatment plants for various hazardous substances and supports the client basedon their various water treatment needs.

Some of the Water Treatment Examples
Factory Wastewater
Treatment

Demolition of theIncinerators

Sludge Dredging

Provide water treatment plantinstallation, operation andmaintenance services

Equipment for concentration of
DXNs wastewater from thedemolition of incinerators

Equipment for sludge dredging
and water treatment.

Groundwater
Treatment

OthersEquipment for groundwater
pumping and treatment ofVOCs, Heavy Metals, Pesticides,
and oils

Provide demonstration units
for field testing

Please contact us for your water
treatment needs

Process Flow
We provide water treatment plants for groundwater contaminants, cyanides, VOCs, petroleum hydrocarbons, heavy metals,
dioxins, etc. and also for turbid water generated by factories and civil engineering works.

Consultation onclient issues

Laboratory testing ofwater samples

Collect contaminated water samples and select best treatment option based on the laboratory
testing.

Plant design

Water treatment plan is designed based on the client requirements selected from coagulative
precipitation, sedimentation, filtration, adsorption or ion-exchange, etc. depend on thewastewater or sludge characteristics.

Plan supply andoperation

We also provide all types of water treatment plants in cooperation with our partner companies.
We will submit the water treatment plant operation and maintenance manuals upon plantinstallation and demonstration at the client site.

18

http://www.ecocycle.co.jp

E-mail：information@ecocycle.co.jp■ Tokyo Head Office and Laboratory
Nihonbashi Hamacho Building, 2-28-1 Nihonbashi Hamacho
Chuo-ku, Tokyo 103-0007, Japan
FAX: +81-3-6661-1876
In charge: Reddy Mobile: +81-90-5688-2502
E-Mail: reddy@ecocycle.co.jp

TEL：+81-3-6661-1875■ West Japan Sales Office
Wakasugi Osaka Station front building 14 F, Sonezaki Shincho 2 - chome TEL：+81-6-6342-0441
3 – 13, Kita-ku, Osaka 530-0002, Japan■ Nagoya Sales office
Wistori Building 3F, Osu 4 chome-13-46, Nagoya 460-0011,
Aichi Prefecture, Japan

TEL：+81-52-269-1675■ Kyushu Sales Office
Tofuku 1st Building 4F, Hakata Station 2 chome-9-13, Hakata-ku,
Fukuoka 812-0013, Fukuoka Prefecture, Japan

TEL：+81-92-477-5100■ Hokkaido Sales Office
Frontier Odori Nishi 3F, Odori Nishi 19 chome-2-1, Sapporo
060-0042, Hokkaido, Japan

TEL：+81-11-213-9281■ Joint Venture in China
EcoChem (Shanghai) Environmental Technologies Co., Ltd. （ECET）

TEL: +86-21-5093-6668

Room 504-506 Building E, Poly Plaza No. 18, Dong Fang Road, Pudong, Shanghai 200120, China
In charge: Ma
Mobile：+86-138-1690-3890
E-Mail: majie@eco-chem.com.cn■ Thailand Office OKAYA(THAILAND)CO.,LTD.
TEL：+66-2163-6333
173/25 Asia Centre Bldg, 23rdFl.,South Sathorn Rd.,
Thungmahamek, Sathorn, Bangkok 10120, Thailand
E-Mail：yoshioka@okayabkk.com
In charge: Yoshioka

2019.8