MUNICIPAL WASTE WATER TREATMENT Reductions of costs and environmental impacts purification of wastewater achieves a quality which allows it to be reused represents what is today not only an essential step in the cycle of water usage but also a means of protecting the worlds lakes, rivers and seas. Our technological skills cover mechanical, biological and physico-chemical processes in such innovative combinations that plant effluent can be reused or that the requirements for its discharge into receiving waters can be reliably met. Ecology and economy are not longer contradictions in this process. Technologies: