无废少废工艺是消除和减少化学工业污染的有效途径

介绍了无废少废工艺概念的形成和发展，以及它的基本内容和化学工业中的实施途径。指出工业污染控制战略从８０年代起已出现了重大变革，即以污染防止（或预防）战略取代以末端处理为主的污染防治战略。采用无废少废工艺是谋求合理利用资源和有效保护环境的根本措施，是消除和减少化学工业污染的有效途径。

概论钢铁厂给水排水的无废少废工艺

本文重点论述了钢铁企业重复使用水:采用高浓缩倍数循环用水可节约新水2～3%;采用空冷闭路净循环用水可节水4～5%;采和串接供水不仅可节约生产新水、减少水资源的开发量,充分利用水资源,而且可以使循环系统水质稳定,还可以控制排污量,减少外排水处理量,甚至实现零排放。

清洁生产是防治化学工业污染的有效途径

叙述了少废无废的清洁生产的概念和内容,以及它在化学工业中的实施途径。指出工业污染控制必须从末端治理为主,转移到污染预防为重点的战略上来。无废少废的清洁生产是防治化学工业污染的有效途径,是谋求合理利用资源和保护环境的根本措施。

From Less or No Waste Manufacturing and Cleaner Production to Recycle Economy -- A Review on the Theoretical Research and Practice of Ecological Enterprises in China

Based on systematical research on the conception evolution of ecological enterprise, theoretical and practical development of constructing ecological enterprise, the paper makes conclusion that ecological enter- prises are developing into a new stage in which governments are launching some pilot projects about construct- ing ecological enterprises. And after that, governments should make policies to spread construction of ecological enterprises, to construct ecological enterprises in legal system and conforming to the standard as soon as possibly. So that, the basic units of ecological economy that fit to the conditions of China will be set up.