The characteristics of tannery wastewater are the high level of contamination of organic substances and poisonous elements like Cr and S.

• 制革废水污染负荷高,废水成分复杂,不仅味嗅、色度、悬浮物、耗氧物污染大,含有重金属离子和有毒物质,而且有较多的氨氮含量。