MOE > Environmental Policy > ETV > Water environment improvement technologies for enclosed coastal seas field
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Target Technology Fields Fields Currently Targeted Small hydropower generation technology field Global warming mitigation technology field (lighting energy reduction technologies) Human waste treatment in natural areas: human waste treatment technology field Organic wastewater treatment technology field Water environment improvement technologies in enclosed coastal seas field Water purification technologies for lakes and reservoirs field Heat-island mitigation technology field (technologies for reducing air conditioning loads by using building envelope systems) Heat-island mitigation technology field (heat pump air-conditioning systems using ground source heat, wastewater heat, etc.) Simplified VOC, etc. measurement technology field
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Target Technology Fields

Water environment improvement technologies for enclosed coastal seas field

Outline of the Field
Background and Related Information
List of Verified Technologies
Enclosed coastal seasEnclosed coastal seas
Improvement of water quality and bottom sediment Improvement of water quality and bottom sediment
List of Verified Technologies
Outline of the Field

Outline of Technologies

The target technologies are those directly applicable to the in-situ improvement of the water quality, bottom sediment and biotic habitats of enclosed coastal seas areas.
To be more precise, the target technologies are a range of technologies whose principal purpose is to achieve one of the following effects.

(a) Technologies to improve water quality and bottom sediment in-situ
     [1] “Improvement of water quality” means the improvement of sea-related living environment items
     [2] “Improvement of bottom sediment” means improvement in terms of organic matters, sulfides, etc.,
      and containment of the elution of nitrogen and phosphorous

(b) Technologies directly applicable to seas to improve biotic habitats
     [1] Technologies for the conservation and/or regeneration of seaweed beds and tideland
     [2] Technologies used to contain or eliminate phenomena causing the deterioration
           of biotic habitats such as dysoxic water mass, blue tide and red tide
     [3] Other technologies used to improve biotic habitats

Example of Target Technology

A water quality improvement technology for enclosed coastal seas that is low cost, that can be easily introduced by local governments and that generates few byproducts.

Reference Materials

For users
Enclosed coastal seas have inherent conditions, including susceptibility to accumulate pollutants. Even though total water pollutant load control has been in place targeting COD, nitrogen and phosphorous, such phenomena as dysoxic water mass and red tide have been observed. To improve the situation, the 6th Basic Direction for the Total Water Pollutant Load Control Scheme (Report of the Central Environment Council, May, 2005) calls for the conservation and regeneration of tideland and improvement of the bottom sediment conditions in addition to conventional measures applied to reduce the pollutant load.

The MoE has been continually promoting the steady progress of total water pollutant load control while encouraging the development and dissemination of technologies used to directly purify seas and technologies applied to improve biotic habitats.

The ETV Program assists the selection of technologies suitable for the needs of users by means of disclosing the results of technology verification tests conducted by third party organizations and providing various types of information required to judge the effectiveness of each particular technology.

For verification applicants
The ETV Program assists the dissemination and wider use of useful technologies of verification applicants by means of bringing out the potential needs of users through the introduction of usable environmental technologies to users, disclosure of the results of technology verification tests conducted by third party organizations and provision of various types of information required by users to select technologies.

A questionnaire survey with verification applicants in the past received such replies as “The number of enquiries about the technology has increased since verification” and “There have been certain positive effects on sales promotion and technological development activities”. Another reply concerning the issued logo was that “The logo has been attached to the product pamphlet, technical reports, company brochure, and company website”.

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