• As the trees grow they will absorn remaining pollutants

Trees used in new wastewater treatment scheme

Jun 03 2014 Comments 0

A new water reclamation project has been started in Missoula, US, which makes use of hybrid poplar trees. Thousands of trees have been planted on the 130-acre site, which will be watered with treated wastewater. Some of the chemicals in the water will help the trees' growth and in turn the trees will help to filter the wastewater. The project will stop the treated effluent from being released into the river.

So far 72,000 trees have been planted on the property, which has been leased by the Clouse family. The scheme has been 20 years in the making and will see the left over pollution from one in five gallons of wastewater created by the city of Missoula absorbed by the trees. While the trees are currently only saplings, they will grow quickly thanks to the contents of the wastewater.

Around half a million gallons of wastewater will be absorbed by the trees every day during the first 12 months of growth. After this, the irrigation levels will be increased to around 1.5 million gallons a day, which accounts for about 20 per cent of the Missoula Wastewater Treatment Plant's daily average. The plant usually releases around 7.5 million gallons a day into the Clark Fork River.

The lease on the land has been signed for 16 years, with a further 40 acres being planted on next year. In total, around 96,000 hybrid poplar trees will be planted on the site. In order to protect the trees, a wildlife-proof fence will be erected around the site, which will help to avoid damage caused by deer.

Around $2.1 million (£1.25 million) will be spent by the city over the next 15 years to develop the project. The trees will then be harvested in 2029, at which time around 2.8 million board-feet worth of sawlogs will be created, along with about 7,400 tonnes of biomass fuel.

Around 85 miles of irrigation pipe have been laid across the property to ensure that all trees receive the amount of water that is needed to ensure maximum growth and water treatment.

Read comments0

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Digital Edition

International Environmental Technology May / June 2017

June 2017

Gas Detection A Fresh Approach to Natural Gas Network Surveys Environmental Laboratory What’s New in the Analysis of Complex Environmental Matrices? Determination of Natural an...

View all digital editions


UK AD & Biogas 2017

Jul 05 2017 Birmingham, UK


Jul 20 2017 Jakarta, Indonesia

Recycling Expo 2017

Jul 27 2017 Rome, Italy


Jul 29 2017 Tehran, Iran

DXC 2017

Jul 31 2017 Big Sky, MMT, USA

View all events