典型皮革化学品的环境影响评价.第一部分-加脂剂在活性污泥条件下的生物降解性.pdfVIP

Evaluation Of Environmental Impact Of Typical Leather Chemicals. Part I：Biodegradability Of Fatliquors Under 1 Activated Sludge Sun Danhong，He Qiang ，Zhang Wenjun ，Xin Liu ，Shi Bi * The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education， Sichuan University ，Chengdu (610065) E-mail ：Sibitannin@ Abstract Leather processing is associated with employment of many kinds of chemicals. These chemicals are usually used excessively in tanneries to ensure the quality of leathers. As a result, a part of the chemicals would inevitably remain in the tannery wastewater and form major pollutants of the leather industry. Biological treatment plays a significant role in removing these chemicals from wastewater and, in fact, biodegradability of these chemicals is directly related to their environmental friendliness. Recently, we have been undertaking a systematic evaluation of biodegradability of typical leather chemicals so as to characterize their environmental impact as exactly as possible. In this paper, the biodegradation behaviours of six typical fatliquor components, including sulfated castor, sulfated neat foot oil, sulfated fish oil, lecithin, chlorinated paraffin and alkyl sulfonyl chloride, were investigated. It has been found that four of them, sulfated castor, neat foot oil, fish oil and lecithin, can be effectively degraded by the activated sludge from the wa