造纸废水的毒性研究

Research on Toxicity of Paper Industry Sewage

造纸工业是世界上六大污染工业之一。在纸浆漂白操作中相继使用氯、次氯酸盐、二氧化氯等漂白剂降解木素,排水中含大量的有机氯化物,具有很大的毒性。在硫酸盐法和亚硫酸盐法制浆造纸废水中含有较高的硫化物。该类废水在厌氧生物处理过程中,由于硫酸盐还原菌的作用,会产生大量的H2S。

Paper industry is one of the six major pollution industries in the world. The process of pulp and paper bleaching operation successively uses chlorine, hypochlorite and chlorine dioxide as bleaching agent to undergo degradation of lignin, and the drainage contains a large number of organic chloride which is of high toxic. In addition, there are high concentrations of sulfide in the wastewater when using sulfate method and sulfite pulping process. This kind wastewater treatment will release H2 S by anaerobic biological method because of the sulphatereducers existed.