• 2.4 billion people live without improved sanitation (WHO/UNICEF 2015).

  • One in ten people have no choice but to defecate in the open (WHO/UNICEF 2015).

  • Where compost type of toilets are used, indecent and pathogenic transportation methods cannot be avoided

  • Disease transmission at work, mostly caused by poor sanitation and hygiene practices, causes 17 percent of all workplace deaths (ILO 2003).

  • Diarrhoea caused by poor sanitation and unsafe water kills 315,000 children every year (WASH watch 2016).

  • Poor sanitation costs Kenya, Kshs 27 billion annually, equivalent to US$324 million (WSP 2012), This sum is the equivalent of US$8 per person in Kenya per year or 0.9 per cent of the national GDP.

  • Open defecation costs Kenya US$88 million per year, yet eliminating the practice would require less than 1.2 million latrines to be built and used (WSP 2012).

Nominate toilet-less people for RaHa Solutions. The nominees MUST be 5 or less. The nominees MUST be staying together in a home or a school.

Nominate adolescent children, especially girls, to increase their opportunities, access to quality services and capacity to lead their own development.

We intend to provide the nominees with one unit of SANI SOLAR. SANI SOLAR is hygienically, technologically, financially, socioculturally, and environmentally friendly option to dispose of human excreta.

If the 5 nominees are in a school, we intend to install the toilet in the school. It will be used by the nominees for the time the nominees will be in the school. When your nominees leave the school, the toilet is assigned another 5 people.

Soon after we install your nominees’ toilet in the school, every 5 of others in the school will also get a SANI SOLAR. This depends on available space in the school. If the school is on a small piece of land, the school may not qualify for multiple units of SANI SOLAR.

If the 5 nominees are staying in one home, we intend to install the toilet in the home. Soon after the installation, every 5 of others in the village will also get a SANI SOLAR.

SANI SOLAR consists of urine-diverting user interface that automatically separates urine and faeces.

SANI SOLAR has a comfortable seat.

Just above the seat is a lever (see picture), which users turn after every long call.

Whenever a person is using SANA SOLAR (for long call), faeces fall into one of four containers, which are installed on a turntable located in a drying chamber located below the toilet seat.

By turning the lever (before leaving the toilet cabin), the user moves the turntable to position another container for subsequent user or use.

The faeces in the containers are quickly dried and stabilized by a combination of directional airflow and solar radiation in the drying chamber, see video

Considering daily use by the 5 persons, the 4 faecal containers are emptied every 5-months only. The emptying can be done easily and hygienically safely by a single person without any special equipment. The disposal of the dried and stabilized residue does not generate a negative environmental impact.

The urine is conducted out of the cabin into the external drying unit where it is converted into a stable, high-quality plant fertilizer. This fertilizer is recovered by the user with the help of a spatula, see video


  • dry & stable plant fertiliser

    1,320 LB (601 kg) of human excreta are naturally converted into 36 LB (16 kg) of dried and stabilized residue and about 20 LB (9 kg) of plant fertilizer. All this without one drop of water, no electrical energy and no operational costs.

    In contrast, the 601 kg of urine and faces generated yearly by one human being is, in some cases, converted to sewage by using 11, 000 litre of drinking water [through the common flushing toilet (WC)]. In many of the semi-arid regions of the world, this not only is a waste of precious resources, but often also leads to environmental pollution and health hazards.

  • Designed for warm arid or semi arid climate

    SANI SOLAR is suitable as decentralized sanitation facility for all rural areas with warm arid or semi-arid climate (areas in map marked in yellow and in green). For best performance it requires:

    • Low humidity
    • Intensive solar radiation
    • High evapotranspiration rate

  • hygienic

    There still exist a large number of locations where the human right for access to improved sanitation facilities cannot be guaranteed. 960 Millions people still practice open defecation (UNICEF 2015). In its latest report on progress on sanitation and drinking water (2015), WHO and UNICEF stated that worldwide 2,4 billion people still lack access to improved sanitation facilities.

    Health hazards caused by germs and parasites are the consequences of such circumstances which mostly affect children living in rural areas. RaHa gives a hygienic and humane solution to improve the sanitary situation in rural areas, not only regarding the use but also regarding the safe disposal of the residues.

  • Robust & Durable technology

    SANI SOLAR is sustainable due to its robust and durable technology. This singular drying toilet was specially designed to resist over a long period under the extreme climatic conditions characteristic for arid and semi-arid regions.

  • zero operational costs

    Financially, SANI SOLAR is sustainable. This means that SANI SOLAR is a complete sanitary solution that neither generates operational costs nor requires external service regarding maintenance or disposal of residues.

  • socioculturally accepted

    Sociocultural Tests and surveys on SANI SOLAR found that women and men of any age acceptance it excellently

  • environmentally friendly

    SANI SOLAR is environmentally friendly: The unique system is not only a conventional dry or waterless toilet, it solves the sanitation problem beyond a hygienic usage up to the treatment and sanitization of the residues. It works without water and electric energy, reducing residues to a minimum.

    Furthermore, it generates a hygienic fertilizer which is easy to handle and applicate.

    In contrast, process involved in common water toilets would look like this.

  • 5 in 1

    RaHa is giving all these 5 steps in one facility!

    Usual water toilets systems are such that the 5 necessary steps, which assure safe handling and disposal of human residues, are done in 5 different facilities.

    In order to guarantee efficiency of decentralised sanitation concepts, not only are toilet facilities needed, but also a range of measures, which assure safe handling and disposal of the residues and if possible, the recovering of nutrients.

    Based on this standard, SANI SOLAR is here.

    All 5 steps in one facility!

    Innovative, autonomous, 5 in 1

    SANI SOLAR merges all 5 steps of the sustainable sanitation chain in one single on-site facility. The system works without water, electricity or chemicals, so it can be run easily and safely by the users only.

    Notice the more than 95% of mass reduction (see in photo container below toilet seat, before and after drying).

  • prevents pollution

    How SANI SOLAR compares to conventional water or compost toilets

    The operation of conventional water and compost toilets leads to considerable amounts of waste or residues, apart from the consumption of the corresponding resources. Treatment of faeces by SANI SOLAR does not only prevent pollution of the environment, but also the dissemination of diseases by flies, as those vectors cannot reach the faeces within the system.

    The sustainable operation of SANI SOLAR does not need any additional aids, the system does not require maintenance or technical service.

    It does not only improve substantially the health parameters of rural populations, but represents also a decent and hygienic alternative towards the frequently precarious conditions of existing makeshift solutions.

  • logistics

    For the successful implementation of sanitation projects in rural areas, logistics are of crucial importance. SANI SOLR is based on the LEGO principle, allowing installation without failures.

    In only 3 hours a unit can be mounted ready for use by no more than 2 persons. All system components are delivered to the final destination on a pallet. 16 pallets can be transported by a truck or inside a 40” sea container.

Alternatively, we repurpose shipping containers as illustrated below.

Depending on the demand, a number of these

in shipping containers