GOTS认证咨询-GOTS对纺织工厂废水处理全流程的COD管控

GOTS Section 4.3.2.6

GOTS第4.3.2.6节

“Wastewater discharges to the environment shall not exceed 20 g COD/kg of processed textile (output)”

“向外界环境排放的废水，平均每公斤加工的纺织品（产出）的 COD 值不得超过 20 克。”

INTERPRETATION

释义

Criteria in this Section relate to compliance requirements for the entire facility.

本节标准与整个工厂的合规要求相关。

The requirement shall be measured downstream of an internal, on-site, wastewater treatment plant and/or an external,off-site, e.g., municipal, wastewater treatment plant receiving wastewater from these wet processing sites.

应对内部（现场）废水处理厂及（或）接收这些湿加工场所流出废水的外部（场外的，如市政的）废水处理

厂下游的要求进行测量。

The applicable test method for COD determination is ISO 6060.

测定COD的适用测试方法是ISO 6060。

The applicable calculation method in this context is as follows:

适用的计算方法如下：

(𝑪 ÷ 𝟏𝟎𝟎𝟎) × (𝑽 × 𝟏𝟎𝟎𝟎) ÷ (𝑾 × 𝟏𝟎𝟎𝟎) = ⋯ 𝒈 𝑪𝑶𝑫/𝒌𝒈

Where;

其中：

C (mg/l) is the COD concentration in water discharged to the environment

after treatment

C（mg/l） 废水处理后排放到外界环境时的COD浓度值

V (m3 ) is the volume of water discharged in the calculation period

V（m3） 计算周期内排放的废水的体积

W (ton) is the weight of textile output in tonnage in the calculation period

W（吨） 计算周期内产出的纺织品的吨位重量

COD requirements for GOTS are measured in g/kg of processed output. Typical COD test reports contain COD values in g/l of effluent/discharge. Inspectors will need to calculate the COD in g/kg of processed output based on the calculation given above in these cases.

GOTS标准下的COD值要求是以每公斤加工产出品的COD克数进行测量，而常用的COD测试报告则以流出/排放升数中含有的COD克数进行计算。在这种情况下，检查员需要按照上述要求计算相应的COD值。