Sustainable Development
According to the requirements of the 12th Five Year Plan for scientific and technological progress of China's textile industry, textile enterprises must take the road of environmental protection, energy conservation and sustainable development.
The company has been proactively implementing the requirements of the Plan, taking on social responsibility, and insisting on sustainable development of environmental protection, energy conservation and consumption reduction.
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Deyi Printing & Dyeing
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Address: Xixiashu Textile Industrial Park, Xinbei District, Changzhou City, Jiangsu Province, China
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Here is the test results.
Test date: July/12/2016
| Test Items | Wastewater sample of Natural dyeing | Wastewater sample of Chemical dyeing | Test Standard |
| COD mg/L | 118 | 588 | GB/T11914-1989 |
| TPmg/L | 0.373 | 8.38 | GB/T11893-1989 |
| TNmg/L | 15.6 | 53.6 | HJ636-2012 |
| AN mg/L | 1.21 | 6.78 | HJ535-2009 |
It can be seen that all the indicators of vegetable dyeing wastewater is far lower than that of synthetic dyeing wastewater, especially the COD amount is 80% less, which can be concluded natural dyeing is better for our earth.
COD (Chemical oxygen demand) is used to measure the water ecosystem. The higher the index is, the less conducive it is to the growth or even survival of aquatic organisms. The low COD of natural dyes indicates it has little effect on the growth of water-based organisms. It has been proved by experiments that the Chlorophytum and Alternanthera philoxeroides is able to grow well enough in sewage of natural dyes.
Another advantage of natural dyeing is that simplification of sewage treatment. As the dyestuff is natural and can be degraded by microorganisms, the wastewater can be recycled and achieve the goal of near-zero emission, which conforms to the current trend of environmental protection, energy conservation and emission reduction.
With great efforts of promotion, the production quantity of natural dyeing fabric has reaches 5-10% of total annual output now, although this special dyeing technique is with relatively high cost and limited to specific market. The company has been verified as base of vegetable dyeing development by CNTAC.