I kēia manawa, ʻoi aku ka nui o ka COD wai ʻōpala maʻamau i ka maʻamau e pili ana i ka electroplating, circuit board, papermaking, pharmaceutical, textile, printing and dyeing, chemical and other wastewater, no laila he aha ke ʻano o ka mālama ʻana no ka wai ʻino COD? E hele kāua e ʻike pū. Wai ʻōpala CO...
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