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.

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

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.

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.

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.

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

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.

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).

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.

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.