KOTITI provides precise testing and analysis services for biodegradability, disintegration, and ecotoxicity under various conditions, in compliance with domestic standards.

As the shift toward eco-friendly materials accelerates, scientific and reliable verification of biodegradability has become increasingly necessary. Based on accumulated analytical capabilities and testing infrastructure, KOTITI evaluates the safety and environmental impact of biodegradable materials comprehensively, supporting quality assurance and reliability.

What is Biodegradability (Compost·Soil Conditions) Testing?

This test simulates the exposure of biodegradable plastics to different inoculated environments (e.g., compost, soil, marine) and determines biodegradability by continuously measuring the decomposition products or consumed substances generated through microbial activity over a given period and under specified environmental conditions.
Biodegradability
Simulated Environments Industrial Composting Facilities Home Compost Natural Soil
  • Simulates aerobic biodegradation under controlled industrial composting conditions (temperature: 58℃)
  • Simulates aerobic biodegradation under home composting conditions, such as backyard bins or small-scale containers (temperature: 25℃)
  • Simulates aerobic biodegradation under natural or agricultural soil conditions (temperature: 25℃)
Relevant Standards
  • ISO 14855-1, ASTM D 5338
  • AS 5810
  • ISO 17556, ASTM D 5988
Duration
  • 45–180 days
  • Up to 1 year
  • Up to 2 years
Target
  • Biodegradable plastics and textile products (e.g., pellets, fabrics, packaging materials, mulching films)
Required Sample Amount
  • Dry weight: 200 g
  • Dry weight: 200 g
  • Dry weight: 100 g

Biodegradability Test Flowchart (ISO 14855-1)

  • Step 1
    01Preparation of Inoculum (Compost)
    pH ratio, C/N ratio, dry solid content (%), volatile solid content (%)
  • Step 2
    02Preparation of Test Material
    Test Material Frozen and Milled Powder (250–500 μm)
  • Step 3
    03Incubation in Progress
    • Prepare a total of 9 test vessels, thoroughly mix and load the standard material and test material, then connect them to the biodegradability testing equipment.
    • Continuously measure CO₂ generation for 45 to 180 days.
    배양진행 이미지배양진행 이미지
  • Step 4
    04Derivation of Biodegradability Results
    • Biodegradability (%)
    • =
    • [(CO₂)T– (CO₂)B]
      ThCO2
    • X 100
    • (CO₂)T : Cumulative carbon dioxide generated from the vessel containing the test material (g/vessel)
    • (CO₂)B : Average cumulative carbon dioxide from the blank control vessel (g/vessel)
    • ThCO2: Theoretical amount of carbon dioxide generated by the test material (g/vessel)

    Derivation of Biodegradability Curves for the Standard Material and Test Material

    표준물질 및 시험물질의 생분해도 곡선 도출표준물질 및 시험물질의 생분해도 곡선 도출

Residual Microplastics After Biodegradation(In-House Method)

Biodegradable plastics are designed to break down more easily than conventional plastics, which means they can quickly fragment into fine particles during the biodegradation process. Therefore, an in-house testing method has been newly introduced to visually monitor the size and quantity of biodegradable micro-particles generated at different stages of the biodegradation period.
* Analysis is only applicable to biodegradable plastics.
  • 생붕괴 시험 재료 무게 측정
    Conduct biodegradation test
  • n days elapsed
  • 일정 기간 접종원 내 생붕괴 진행
    Collect a specific amount
    of test material
  • Pre-treatment
    (organic matter oxidation and density separation, etc.)
  • 2mm 표준체 이용하여 거름
    FT-IR
    microplastic analysis
Microplastic Distribution Graph
Allows observation of the size and distribution of microplastics at different stages of the biodegradation period
미세플라스틱 분포 그래프미세플라스틱 분포 그래프

Application Procedure

  • 01

    Submit Application

  • 02

    Issuance of Quotation and Tax Invoice

  • 03

    Payment Confirmation

  • 04

    Testing and Analysis

  • 05

    Test Completion

  • 06

    Issuance of Test Report

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