Kapitel 1: Umwelt-Mindestkriterien

Kategorie: Water

Wastewater parameters (basic) (E08)

Criteria question

Does the standard include threshold values on basic wastewater parameters?

Guidance

All wet-processing sites are relevant with regard to criteria for wastewater and need to be covered by the standard. In the case of textiles, the basic parameters, at least for direct discharge, are BOD, COD, pH, colour removal, temperature, total phosphor and total nitrogen. As a reference for threshold values that go beyond national legislation, the 2016 Wastewater Guideline ZDHC and its progressive and aspirational limits can be used for comparison:
( https://www.roadmaptozero.com/fileadmin/pdf/Files_2016/ZDHC_Wastewater_Guidelines_Print.pdf).

In the case of leather, the basic parameters are BOD, COD, NH4-N (or TKN), sulphide and chrome (total).

Degree of Intensity (DoI) 

  1. Standard refers to national legislation.
  2. Standard formulates own threshold values that go beyond national legislation.


In order to fulfil minimum criterion E08, the standard has to include an immediate obligatory requirement to demand threshold values on basic wastewater parameters in line with national legislation.

Kommentare (1)

Kristin

ID: 111 17.01.2019 16:08

Die zwei Stufen des DoI können in der Praxis schwierig werden, da in einigen Ländern (wie z. B. Deutschland) die Grenzwerte sehr anspruchsvoll sind, sodass ein Erlangen weiterer Punkte (für Stufe 2) kaum möglich ist bzw. deutlich schwerer ist.
Über diese Stufen sollte nochmals diskutiert werden.