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Environmental Conservation


Environmental Proposals / Green Procurement

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Chiyoda approaches the design, procurement and construction stages of every project with consideration for the nvironment. Improving on the plans provided by our clients and proactively engaging in environmental proposals, we aim to construct plants with a lower environmental impact.
Over the past five years we have submitted an average of 322 proposals annually. In FY2017, 197 proposals were accepted by our clients. Our project procurement operations are implemented on our green procurement guidelines based on the Ministry of the Environment’s Green Purchasing Law so that we utilize construction materials and construction methods with less of an environmental impact.

Case study of project

CO2 Reduction Through Engineering
-Mega Solar Plant Construction Effectuates CO2 Reduction-

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In December 2017, Chiyoda completed construction of the Shima City Ago Tategami Mega Solar Plant (12.8 MW) for Sanco Real Estate Co., Ltd. The plant is located in Agocho Tategami, Shima-shi, Mie Prefecture. The Japanese government’s Basic Energy Plan positions photovoltaic power generation as a key energy source that is supposed to make up 22-24% of renewable energy by 2030. Chiyoda has been involved in the design and construction of approximately 29 mega solar plants to date, and when the power plants currently under construction have all been completed, they will generate a total of 460 MW. It is estimated that the greenhouse gas emissions reduction effect will be equivalent to approximately 4.5 million tons* by 2040.

We will continue in the future as contractors providing design and construction services to meet the needs of our customers that promote carbon-free projects.

* Value estimated in accordance with Japan Photovoltaic Energy Association Display Guidelines (FY2018)

Shima City Ago Tategami Mega Solar Plant

Initiatives to Industrial Wastewater Reclamation in Water Stress Area
-MODON Wastewater Reclamation System Demonstration Project-

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The Chiyoda Group implemented a demonstration project entrusted from NEDO (the New Energy and Industrial Technology Development Organization) for wastewater reclamation system at the Dammam First Industrial City established by MODON (the Saudi Industrial Property Authority) in Saudi Arabia, which has a high level of water stress*1, after carrying out a risk assessment and feasibility study. As an initiative in the water recycling field, we implemented a demonstration project for wastewater recycling system technology at the Dammam First Industrial City, which is operated by MODON. The project demonstrates a system that achieves an energy saving of approximately 30% over conventional methods of seawater desalination. The project treats approximately 5,000 tons of wastewater per day using membrane technology (MBR*2 and RO*3 membranes), and reuses 3,500 tons of industrial wastewater. The project country has limited water resources, so promoting the recycling and reuse of industrial wastewater contributes to the effective use of water resources. Implementation in other water stress areas is anticipated.

*1: Water stress is an indicator for evaluating the extent of strain relating to water supply and demand, and is expressed as the usable quantity of water resources per capita of population.
*2: Membrane bio reactor
*3: Reverse osmosis

System Diagram

Participating in the Japan Business and Biodiversity Partnership

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Chiyoda Group is participating in the Japan Business and Biodiversity Partnership. Our aim at “harmony between energy and the environment” defined in our corporate philosophy has something in common with the Vision 2050 “Living in harmony with nature” adopted at the Convention on Biological Diversity (COP10).

Chiyoda Group is making the efforts below for conservation of biodiversity.

(1) Efforts in the business operations

  • Steady supply of environmentally friendly LNG and renewable energy
  • Carbon management toward low carbon society
  • Optimizing energy consumption, detoxifying, reducing and recycling emissions and waste
  • Development of eco-friendly technologies
  • Reducing the environmental impact on and around construction sites

(2) Efforts by CSR activities

  • Reducing the environmental impact on and around construction sites
  • A member of Kanagawa Green Trust Foundation
  • “Chiyoda no mori (Chiyoda’s forest),” reforestation in Kamaishi, Iwate Prefecture as part of reconstruction assistance for earthquake-stricken areas
  • The report on this activity is posted on the website of Green Wave launched by the UN Secretariat of the Convention on Biological Diversity.
  • Purchase of CO2 sequestration credit. (We purchase 19.00 t-CO2 every year from FY 2015.)

We will continue with the efforts above while referring to the 20 Aichi targets adopted to halt the decline in biodiversity at COP10.