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We handle hard-to-treat waste as well as a wide range of other items.

Kureha Ecology Management operates two intermediate treatment facilities: WASTECH Iwaki located in Iwaki-shi, Fukushima and WASTECH Kanagawa situated in Kawasaki-shi, Kanagawa.

WASTECH Iwaki is dedicated to the advanced treatment of hard-to-treat waste, including waste containing halogens and heavy metals, PFAS-containing waste, and low-concentration PCB waste.
WASTECH Kanagawa focuses on thermal recovery, harnessing waste heat generated during incineration to promote energy efficiency. This facility primarily handles infectious waste and waste plastics, contributing to sustainable waste management practices.

Features and Strengths

  • We provide a seamless one-stop service within our group, encompassing every stage of waste management—from collection and transportation to intermediate treatment and final disposal.
  • With a combined incineration capacity of approximately 700 tons per day across two state-of-the-art facilities, we have established a strong track record of managing waste from a wide range of regions across Japan, with a primary focus on eastern Japan.
  • WASTECH Iwaki specializes in the treatment of a wide variety of waste materials, including those containing halogens and heavy metals. The facility is equipped with advanced exhaust gas and wastewater treatment systems, implementing robust and comprehensive measures to effectively control dioxins and ensure environmental safety.
  • WASTECH Kanagawa focuses on thermal recovery power generation, utilizing waste heat generated during incineration to produce energy. This innovative approach contributes to the realization of a sustainable society by promoting energy efficiency and resource conservation.

  • Keeping it all within our own group

    We provide a seamless one-stop service within our own group, covering every stage of waste management―from collection and transportation to intermediate treatment and final disposal. This integrated approach streamlines complex contract procedures.

  • Safe treatment of complex contaminated waste

    By leveraging our advanced engineering expertise, we safely and effectively neutralize hard-to-treat waste containing multiple hazardous substances.

  • Recycling Services Available

    Both WASTECH Iwaki and WASTECH Kanagawa handle incinerated waste recycling (outsourced), and WASTECH Kanagawa also generates thermal recovery power.

Items we can handle

Kureha Ecology Management excels in managing a diverse array of waste types, ranging from general waste to highly challenging, hard-to-treat waste.

This facility is equipped to manage a wide variety of waste, including hard-to-treat materials such as halogen- and heavy metal- containing waste, PFAS-containing waste, and low-concentration PCB waste.

  • Halogen waste
  • PFAS-containing waste, such as foam fire extinguishing agents
  • Low-concentration PCB waste
  • Infectious waste
  • Waste containing multiple types of hazardous substances
  • Reagents and pesticides
  • Dioxins
  • Waste acid and waste alkali
  • Florescent lamps and dry cell batteries
  • Waste containing heavy metals
  • Flammable and water-reactive waste
  • Odorous substances
  • Sludge
  • Waste oil and waste liquid
  • Waste plastics, wood scraps, paper scraps
  • Asbestos-containing waste (Himeyuri Sogyo)

Treatment Facilities

Our treatment facilities are located in Iwaki-shi, Fukushima and Kawasaki-shi, Kanagawa. These facilities are equipped to accept waste from a broad range of areas, with a primary focus on eastern Japan.

  • WASTECH Iwaki

    This facility is designed to handle a wide variety of waste, including challenging materials such as halogen- and heavy metal-containing waste, PFAS-containing waste, and low-concentration PCB waste. Its sophisticated systems ensure safe and effective treatment of even the most hard-to-treat materials.

  • WASTECH Kanagawa

    This facility generates electricity through thermal recovery by utilizing waste heat from incineration. It is equipped with three incinerators -one fluidized bed furnace and two rotary kiln stoker furnaces — capable of treating various types of waste. This innovative approach contributes to achieving carbon neutrality and sustainable waste management practices.

Our goal is to improve environmental conservation and living and production conditions from the perspectives of air and water.

Taking advantage of Kureha Ecology Management's proprietary technologies, we provide exhaust gas treatment and water treatment equipment tailored to the specific requirements of our customers.
Our exhaust gas treatment systems are designed to liquefy and recover VOCs (volatile organic compounds) from exhaust gas, enabling efficient VOCs recycling. These systems are widely utilized in a variety of factories across Japan and internationally, contributing to sustainable industrial operations.
Our water treatment equipments enhance water quality by removing odors and unpleasant tastes, adjusting pH levels, and preventing issues such as red water and corrosion caused by raw water supplied by waterworks. These systems are trusted by numerous water purification plants to ensure safe and clean water.

  • Unique technology

    Our advanced technologies have been developed and refined over decades of experience, leveraging our unique expertise to deliver innovative and reliable solutions.

  • Design tailored to customers' needs

    We carefully design and select the most suitable equipment according to customers' needs, considering factors such as equipment capacities, installation locations, and safety measures to ensure optimal performance.

  • Comprehensive Maintenance support

    We provide systematic proposals and comprehensive maintenance services tailored to your budget, ensuring long-term reliability and efficiency after installation.

Air Environment Business

  • VOCs Exhaust Gas Treatment Equipment

    Our advanced exhaust gas treatment system efficiently removes and recovers VOCs (Volatile Organic Compounds) from exhaust gases, enabling their recycling with minimal energy consumption. This innovative system is designed to achieve zero emissions and support carbon neutrality, making it a revolutionary solution for sustainable air management.

Water Environment Business

  • Water Treatment Equipment

    In response to the increasing deterioration of tap water quality caused by abnormal weather conditions, our proprietary technology utilizes powdered activated carbon and carbon dioxide gas to ensure consistent and reliable water purification. This system plays a critical role in supporting sustainable water supply operations, safeguarding this essential lifeline for communities.

GASTAK:VOCs Exhaust Gas Treatment System Contributing to Carbon Neutrality
GASTAK

The GASTAK system is designed to efficiently collect and recover volatile organic compounds (VOCs) from solvent-laden gas streams. It features a continuous fluidized-bed adsorption column and a continuous moving-bed desorption column, working in tandem to ensure effective VOCs removal and recovery.
At the heart of the GASTAK system is Kureha's proprietary Bead Activated Carbon (BAC), a highly efficient adsorbent. During operation, BAC continuously circulates between the adsorption and desorption columns, capturing VOCs from the gas stream. The purified gas is then released from the top of the adsorption column, ensuring clean emissions.
The recovered VOCs are liquefied to a high standard of quality, making them suitable for reuse or recycling. This innovative process not only reduces environmental impact but also supports sustainable practices and contributes to carbon neutrality.

Summary
  • Utilizes Continuous fluidized-bed adsorption and continuous moving-bed desorption processes.
  • Employs bead-shaped activated carbon (BAC) as the adsorbent.
  • Effectively recovers VOCs from solvent-laden gas streams in liquid form.
Main application results
  • Toluene, ethyl acetate, MEK, xylene, IPA, ammonia, odor components, other VOCs
  • Introduced in various facilities such as those for semiconductors, equipment cleaning, chemical plants, and printing

Features of GASTAK

  • Features of Bead-Shaped Activated Carbon (BAC)

    Our bead-shaped activated carbon (BAC) is manufactured from petroleum pitch, granulated into uniform bead shapes, and then steam-activated. The key features of BAC include:

    1. Large specific surface area and high adsorption capacity
    2. High flowability due to bead shape, making it easy to handle and transport.
    3. Due to its high strength, there is little loss from wear and breakage caused by collisions with pipes during transportation or collisions between BACs.
    4. The catalytic activity is extremely low due to ash content of 0.05% or less, resulting in low regeneration losses.
  • 球状活性炭BAC

    Bead-shaped activated carbon BAC

  • Safe and highly efficient VOCs adsorption using a fluidized bed system

    Inside the adsorption tower, multiple fluidized beds are formed, and the fluid flows through each bed, moving from the lower part of each bed to the bed below.

    Bead-shaped activated carbon (BAC) comes into contact with upward-flowing VOCs exhaust gas evenly and adsorbs VOCs or odor components in the gas.

    The purified gas that has passed through the fluidized bed is safely released into the atmosphere from the top of the adsorption tower.

    • Since activated carbon circulates in a system combining independent fluidized bed adsorption and moving bed desorption, there is no switching between adsorption and desorption, minimizing energy loss.
    • The fluidized bed design eliminates heat storage during adsorption onto activated carbon, ensuring high safety even when handling flammable solvents.
    • Since air and nitrogen gas are used as the removal gases, almost no wastewater is generated.
    • Additionally, the increased gas velocity e the adsorption section allows for a more compact installation area, optimizing space efficiency.

  • Solvent recovery equipment

    GASTAK：SN Type

    GASTAK system offers flexible configurations to deliver efficient and safe results, with designs tailored to meet the specific requirements of each application.
    A key feature of the SN type is its use of a multi-tube heat exchanger in the desorption tower, where bead-shaped activated carbon (BAC) is indirectly heated using water vapor as the heat source. Additionally, nitrogen is employed as the desorption gas, effectively minimizing VOCs degradation and preventing water contamination in the recovery liquid. This ensures the liquefaction and recovery of high-quality VOCs.

    The system operates on a continuous cycle of adsorption and desorption, significantly reducing the consumption of water vapor and nitrogen gas, which helps to keep running costs to a minimum. The SN type has demonstrated exceptional performance across a wide range of industries, including printing plants, paint and ink production plants, tape manufacturing plants, chemical plants, and other facilities.

  • Structure of the GASTAK device

Features of GASTAK SN Type

  • 01

    Ideal for Flammable VOCs

    The desorption section operates in a nitrogen atmosphere, safely positioned well outside the VOCs combustion range. In addition, the system is equipped with a safety device that constantly monitors the oxygen concentration in the nitrogen gas circulating inside the desorption tower, ensuring safe and reliable operation.
  • 02

    Ideal for Water-Soluble VOCs

    Nitrogen is used as the desorption gas, resulting in extremely low moisture content in the recovery liquid. This makes the system highly effective for recovering water-soluble VOCs with superior quality.
  • 03

    Easy Wastewater Treatment

    Activated carbon is indirectly heated with water vapor, ensuring that the heating vapor does not mix with the recovered liquid. This design minimizes wastewater generation and makes it easier to treat the wastewater.
  • 04

    Low Running Costs

    The system recycles nitrogen gas, significantly reducing consumption. In addition, continuous operation requires only minimal amount of steam and cooling water, keeping operational costs to a minimum.
  • 05

    Easy Maintenance

    Since there is no need to switch between adsorption and desorption, no mechanical driving section is required, making maintenance extremely easy.
  • 06

    Optional Extras

    Installing high-temperature regeneration equipment SSR suppresses degradation of BAC caused by high-boiling-point components, enabling stable long-term operation of GASTAK system.

  • Ammonia exhaust gas treatment equipment

    GASTAK：HS Type

    GASTAK offers flexible configurations to deliver efficient and safe results, allowing for designs tailored to meet the specific needs of each application.
    The HS type equipped with specially coated bead-shaped activated carbon (BAC) treated with phosphate to enhance its ammonia adsorption capacity. The desorbed ammonia is concentrated and can either be incinerated in an incinerator or reused as ammonia fuel, providing a sustainable and versatile solution.

    In addition, the HS type has demonstrated proven effectiveness in deodorizing exhaust gases emitted from food factories and fertilizer plants, making it an ideal choice for odor removal applications.

  • GASTAK：HSタイプ

Features of GASTAK HS + Combustion Type

  • 01

    Special Activated Carbon with Phosphate Coating

    • Bead-shaped activated carbon (BAC) with excellent wear resistance and flowability is coated with phosphate using a proprietary manufacturing process. This process ensures a high surface area and uniform phosphate coating, thereby enhancing ammonia adsorption performance.
  • 02

    Multi-Stage Fluidized Bed Adsorption Section

    • The adsorbent BAC forms a fluidized bed with a layer height of 15 to 20 mm, enabling efficient ammonia adsorption and removal across multiple fluidized beds. The purified gas is safely released into the atmosphere.
  • 03

    Moving Bed Desorption Unit

    • In the desorption unit, BAC is indirectly heated and comes into countercurrent contact with upward-flowing steam carrier gas, facilitating desorption. The desorbed ammonia is treated externally as concentrated ammonia gas or reused, supporting sustainable operations.
  • 04

    Air Flow Conveyance Section

    • The regenerated BAC is transported back to the adsorption section via an airflow conveyance system, where it resumes ammonia adsorption, ensuring continuous and efficient operation.