|Frequenty Asked Question:||Response:|
|What industrial processes are included in the assessment scope?||All industrial processes starting with the input of fabric quality water to the plant through finishing of the fabric. This includes all components of the dyeing process, various finishing processes, humidification, cooling tower, and steam production.|
|What water uses within the mill are excluded from the assessment scope?||
Domestic water used for human consumption or toilets are excluded, as well as water used for steam production required to generate energy in the power plant are excluded.
Normally some portion of power plant steam is reused in fabric production so that portion of the steam is included as production water as well.
|“Steam condensate and/or “cooling water” that is reused in a separate process, how it will be treated?||Water that is reused in a separate process can be counted as reused water and counts towards a mill’s overall freshwater use reduction. Here we are aiming at technology or process changes that lead to a major reduction in freshwater use without adversely affecting the final product properties or characteristics.|
|What is the standard that freshwater reductions are measured against?||
For process improvements, mill performance in the year 2018 is considered the baseline, so the average water use per meter of fabric in the assessed period is compared to the water used in 2018.
All water recycling, regardless of when first implemented is considered a reduction in freshwater use.
|How is the freshwater savings calculated?||
Following is the list of steps that we perform to calculate total freshwater savings:
|Are there any other parameters beyond the 30, 60 or 90% reduction in water use levels that is required for each performance designation?||
There are a few:
|Are there any other parameters beyond the 90% reduction in water use that is required for Indigood® Gold designation?||Overall freshwater use must be less than 5 liters/meter of fabric for all industrial processes|
|How is raw water treatment process of external source water considered if it is required to make the water usable within the mill?||In this case, if the water is not suitable for typical industrial use without treatment, we are only considering the water treatment output quantity received that meets required parameters for source water to the mill. Such water treatment processes could be resin softening, ion exchange, membrane filtration (RO/NF) etc.|
|If untreated municipal sewage is treated by the mill so that it is usable as input to industrial processes, how is the water considered in the Indigood® Program analysis?||Here it is expected that the water is a waste from other municipal or industrial processes and is not suitable for any use prior to the mill treating it. In this case, the mill gets credit for recycling the water as long as it is returned to the watershed or municipal treatment meeting all regulations for its output.|