As the rate of municipal and industrial wastewater treatment goes up, the amount of sludge produced in the treatment process increases a lot.

随着生活污水和工业废水处理率的提高，污泥的产量越来越大。

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His idea was to treat industrial wastewater by passing it through the iron filings, and then treat it as municipal wastewater.

他的想法是分两步：先让工业污水通过铁粉处理之后再作为一般市政废水处理。

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The project aims to help improve environmental conditions in Liuzhou by improving wastewater treatment, industrial pollution control, municipal sanitation and solid waste services and management.

本项目旨在通过加强污水处理、工业污染控制、改善城市环境卫生以及加强固体废物服务与管理，从而改善柳州市的环境状况。

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The company is now growing its portfolio from municipal wastewater projects to include industrial contracts, desalination and water-reuse projects.

FORBES: BY ELIZABETH BROOMHALL AND ROBERT OLSEN