3) hardly biodegradable organic
生物难降解有机物
1.
The application of the wastewater containing heavy metal, dye, polychlorinated hydrocarbons and hardly biodegradable organics with zero- valent iron was summarized, and the characteristic as well as the prospect of the technology was discussed.
介绍了零价铁的性质及其处理污水的机理 ,概述了零价铁在处理含重金属、染料、多氯化合物、生物难降解有机物等废水的应用状况 ,评述了零价铁处理废水的特点及应用前景。
4) biorefractory chemical organic wastewater
难生化化工有机废水
5) high concentration and refractory organic wastewater
高浓度难生化有机废水
1.
The combined techniques of ferric-carbon microelectrolysis and Fenton reagent for treating high concentration and refractory organic wastewater were studied.
研究了Fenton试剂法强化铁炭微电解工艺对高浓度难生化有机废水的预处理效果。
6) biodegradable organic compounds
难降解有机化合物
补充资料：难夫难妻(难ｎàｎ)
一名《洞房花烛》。故事片。亚细亚影戏公司1913年摄制。郑正秋编剧，张石川、郑正秋导演。一对素不相识的青年男女，经媒婆撮合拜堂成亲，在封建礼教桎梏下开始艰难的夫妻生活。为中国第一部故事片。
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参考词条