Wastewater systems

From urban to alpine. We plan and build sustainable, site-adapted sanitation systems for your Tiny House, your mountain lodge or new urban neighbourhoods.

Vuna presents you with a complete and up-to-date overview of possible systems and technologies for your sanitation needs. We plan and build customized systems and offer the appropriate (waste-) water treatment.

A sophisticated, customized combination of these steps leads to solutions that close water and nutrient cycles. We plan decentralized wastewater systems for remote homes and implement self-sufficient rural sanitation systems.

Are you looking for a decentralized wastewater treatment system?

We recommend separating urine, feces, and greywater and treating them separately. We use the following technologies, among others, to separate wastewater streams:

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Dry and composting toilets

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Dry toilets require no water and are therefore a water-saving solution. In dry composting toilets, urine and feces are treated separately, and the nutrients are reused. Feces and toilet paper are gradually broken down in the compost chamber with the help of composting worms until the volume is reduced by approximately 901 TP3T.
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→ FAQ Dry Toilets
→ Portfolio of dry toilets⠀
→ List of mountain huts with conveyor belt toilets

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Worm, substrate and plant filters

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A substrate filter consists of a vertically flowing tank filled with substrate. The substrate surface retains solids, while the water percolates through a drainage system. Biological purification takes place within the substrate through microorganisms. In a verm filter, composting worms ensure that the solids are broken down as completely as possible. In a constructed wetland, the plants keep the substrate oxygenated and loose.
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→ Explanatory video water purification garden
→ Phytotiny order form
→ Wastewater Treatment Plant Brochure
→ Portfolio: Chamanna Cluozza

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Greywater recycling 

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By treating and reusing greywater on-site, we consume less fresh water and reduce our environmental impact. Due to its low level of pollution, greywater is particularly well-suited for on-site treatment and reuse.
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→ FAQ Water Recycling
→ Portfolio: Phytotiny in Bürchen

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SBR (Sequencing Batch Reactors) 

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In a SBR (Selective Batch Reactor), wastewater treatment takes place in four phases (batches) that run sequentially in a tank (reactor) under electronic control: 1. filling, 2. aerated treatment, 3. sludge settling, and 4. discharge of the clarified water. SBR systems are very compact but require electricity.
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→ Portfolio

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Urine recycling technology

Urine is a valuable resource that, when collected separately, can be used as fertilizer. There are various ways to concentrate or stabilize the fertilizer. For larger buildings (over 500 people), the Vuna process is suitable, which transforms urine in several stages into an odorless, safe, and concentrated liquid fertilizer. We also use this process to stabilize liquid manure, which reduces ammonia emissions. For smaller buildings and individual toilets, our partner company Ogmo is developing a suitable process.
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→ Urine recycling technology
→ Aurin brochure
→ Vuna Nexus

→ Ogmo
→ Portfolio: Nutrient Recycling

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Trickling filter 

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A trickling filter is a biological wastewater treatment system in which pre-treated water trickles over an aerated filter medium. Microorganisms that colonize the filter material break down the dissolved organic substances.
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→ Portfolio: Lidernenhütte SAC

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A sophisticated, customized combination of these steps leads to solutions that close water and nutrient cycles.