AN OVERVIEW OF STRATEGIES FOR REDUCING THE ENVIRONMENTAL-IMPACT OF BLEACH-PLANT EFFLUENTS

被引：0
|
作者：
KINSTREY, RB
机构：
来源：
TAPPI JOURNAL | 1993年 / 76卷 / 03期
关键词：
BIBLIOGRAPHIES; BLEACHING; BLEACHING EFFLUENTS; DELIGNIFICATION; ECOLOGY; MULTISTAGE PROCESS; POLLUTION CONTROL; PULPING; STANDARDS;
D O I：
暂无
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
Concern about the hazards of chlorinated organic materials has led to imposition of strict limits for emission of total organic chlorides (TOCl), adsorbable organic halides (AOX), and dioxin in bleach-plant effluents. Several states also have imposed stringent standards limiting discharge of colorants. The pulp and paper industry is responding by reducing its reliance on elemental chlorine as a bleaching agent. This report outlines the various strategies for reducing chlorine usage. The available strategies fall under two general headings: (a) increased delignification of pulp before delivery to the bleach plant and (b) alternative bleaching sequences and bleaching chemicals.
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页码：105 / 113
页数：9
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