New photovoltaic system in St. Josephs Hospital

In spring 2017 BBM received the order to support the St. Josephs Hospital in Kitgum (UGANDA) with the installation of a photovoltaic system.

The unsteady electrical power supply and breakdowns handicapped the hospital work enormously.

On November 28th 2017 the PV system was successfully tested and handed over to the hospital. Already on the following day, a Sunday, from 09:00 a.m. on, the hospital was fed entirely by the PV system. On weekdays the feed-in of the PV will be between 25 and 30 %. A first and important step for a smooth, efficient and economic electrical power supply fort the hospital.

This project was financed by a co-financing of EWK Zell (  and the Epiphany mission of the catholic youth (


Technical data:

PV installed: 25.000 Wp

2 inverter modules Aros each 12,5 kW

UPS for solar operation Aros 120 kW bidirectional

Batteries 33x 12V 150Ah C10 of Hoppecke


Procurement and logistics by BBM Beschaffungsbetrieb der MIVA

Installation: BBM  and MECS / Gulu

Time of installation: 16 days including earthwork and tests

Ecological Restructuring by the example of St. Luke Hospital

The St. Luke Hospital in Angal, north-west in Uganda, is for 180.000 people the only place, where qualified medical care is possible. But the infrastructure of the hospital is outdated. The income of the “Community Hospital” can hardly pay the regular costs, like salary, power supply, etc.

To make sure that the quality of medical care is safe a restructuring from parts of the hospital was indispensable – implanted by BBM as the general contractor. The restructuring was made in 2 years (2015 – 2016) in the following sectors:

  • power supply:
    • Training of the staff with involvement of other hospitals (best-practise approach)
    • Renovation of power supply and distribution
  • water supply:
    • procurement and installation of a 50m³ panel-tank additional to the outdated water tank
  • wastewater-management:
    • Restructuring of the wastewater Treatment with various Pre-Treatment Units and a constructed wetland (instead of the old lagoon)
    • Storm-Water-Management
  • waste-management:
    • Implementation of waste separation
    • Renovation of the waste bins
    • Training of the staff with involvement of other hospitals (best-practise Approach)
Ecological Restructuring by BBM

The BBM has been implementing ecological restructurings of Hospitals in East Africa since 1995 with donations of donor organizations. Core sectors are ecological power supply, drinking water supply as well as wastewater and waste Management.

However not the implementation but the human is the important aspect. Together with the Project partner and other involved Partners (e.g. the surrounding municipalities) the Project aims defined and realized. An important component of the implementation is the passing on of the Know-How to the local technicians through Workshops, for which also experts from bordering Hospitals are invited. This makes a best-practise exchange within Africa possible and the support of the local Know-How. Furthermore, besides the improvement of the Health care as well as the ecological thought is transmitted

Solar Power for Radio Wa, Uganda


Project overview:

Country: Uganda


Solar power supply for

  • Radio Wa Studio, Lira Town (20 kWp)
  • Radio Wa Transmitter, Ngetta (12 kWp)
  • Detailed Planning
  • Procurement and Delivery of equipment (PV, batteries, inverter, cables) from Europe
  • Installation of electrical / PV equipment, together with local experts
  • Commissioning
  • Training
Project Partner:



Radio Wa

Duration: July 2014 – October 2015


For more information, please contact the project manager Manfred Pichler:





St. Mary’s Hospital, Uganda – A major order is realized

Around 4000 people are staying in St. Mary’s Hospital in Lacor, Gulu, Uganda per day-patients, medical staff and visitors. The Hospital has water supply facilities, which get their water from a number of wells.  The waste water is collected by a central sewer system and is going to be poorly cleaned in the wastewater lagoons.  Especially this insufficient preparation of the wastewater requires action.

An efficient waste water preparation is important, because without it, it would be impossible to eliminate the pathogens in the waste water.  Since there is the danger that resistant pathogens get from the groundwater into the drinking water. And because of that cause a disease cycle: The bacteria contaminated water is going to be pumped out of the well and gets like this back in the human body. This cycle should be stopped, so that no water based diseases could expand. The supply with clean water and the access to appropriate sanitation systems are the main challenges in this development cooperation.  The enhancement of sanitation and water supply is an important component in the fight against poverty and the destruction of the environment, which is also said in the Sustainable Development Goals of the UN, as well as in the Laudato Si, the environment encyclical of the pope.


Dipl.-Ing. Josef Sperrer, a civilian engineer, planed the order of Horizont 3000 the plants for an improvement of the water supply, the use of rainwater and the preparation of wastewater according to legal requirements.  After solutions were found and the planning was coordinated together with local decision makers, the needed jobs were publicly advertised. The BBM could win this tender as the best and cheapest supplier and was instructed to realize these actions.

High-quality wastewater treatment with overgrown soil filter

So far the wastewater in St. Mary’s Hospital was directly brought to the wastewater lagoons without any preclearing, so that they silted as a result. From now on the wastewater is mechanically cleaned in a sedimentation tank with a usable volume of 300 m³. The sludge, which is settled down in the tank, is going to be pumped away and used for agriculture.

Coarse materials are hold back in the sedimentation tank

The wastewater lagoons clean the water only insufficient. To clean the 200 m³ wastewater per day according to legal requirements an overgrown soil filter with approx. 850 m² patch surface was constructed. This soil filter is a combination of biological sewage plant, trickling filter and a solid reactor.  The wastewater is gets intermittently to the biological level and is sprayed by an extensive laid piping on to the surface.

Underground Rainwater storage tank

In the hospital the rainwater is used for the lab and the washing facilities. For the storage of the rainwater underground tanks per 50 m³ usable volume were built.The plants were built very professional by local experts.

Norbert Demmelbauer: „We have worked with Dominic Ocaka and his employees since years. Because of his great competence, he makes the realisation of this project a lot easier.”

Water supply – Priority: Leak removal

The check at the water supply network showed that around 30 % of the transported drinking water gets lost because of various leaks. Mainly dripping fittings, old sealing but also regular leaks could be found. Alain, an Austrian plumber, trained the local plumbers. From now on local plumbers could do the necessary work themselves.

Completely renewed sanitary rooms

Due to the efficient use of available materials, a sanitation area could be completely renewed. For the first time built in cisterns were used. And also the partly corroded iron pipes were renewed.
The experts of BBM set together with Josef Sperrer new standards for the wastewater cleaning. The newly developed overgrown soil filter can clean large amounts of wastewater with a high quality and is suitable to upgrade insufficient plants.



Development of hybrid energy management

ASIC (Austrian Solar Innovation Centre) is a research partner of BBM. Within a new project the ASIC could help the BBM for the development of a hybrid energy management to support energy systems.

Especially in developing countries the quality of the power network is not really satisfying most of the time. Failures and fluctuations of the operating parameters make the supply of vital devices, e.g. in a hospital, to a complex task.  As a substitution expensive diesel motors are used. From now on they try to integrate PV plants, which make the power clearly cheaper, into the energy systems. A variety of configurations were tested with simulations, to find out, which is the best combination of PV and diesel generators. A core element was the development of an optimised energy management system regulating the interaction of the individual components during operations and collects at the same time data for an automatic review of the system for the error detection. In the next step the energy management can be integrated into the efficient control system (PLC), because of the knowledge gained. It also can be used in affected areas and plants.

In the meantime this PCMS (Power Control & Monitoring System) is used in two radio stations and one hospital

St. Clare Children’s home


Location: Aber, Uganda (Lira Diocese)
Task: Planning and construction of three major buildings and three outbuildings, planning and implementation of infrastructure (water, sewage, energy)
Duration January 2009 to November 2011
Project partner: Seraphisches Liebeswerk (SLW) of the Capuchin and Lira Diocese


BBM was commissioned by SLW with the planning, the coordination of construction and installation of all technical equipment. A BBM staff member from Uganda was responsible for supervising the local construction and the on-site coordination of companies. BBM experts from Austria supervised the progress of work via regular business trips to the project.

First, the relevant plot of land was purchased, cleared and fenced-off. Additionally, an access road to the building site had to be created. Next, a well was dug, feeding a 20,000-litre water tank via a solar-powered pump. Three main buildings were constructed: the accommodations for girls and boys, each with 108 beds and a central service building with assembly hall, kitchen and offices. There were three outbuildings: a sisters’ house and two guest houses for short-term or long-term guests. All rooms were furnished and included complete plumbing and electrical installations. BBM were also responsible for landscape development and the creation of access roads.

Ecological Concept

The complex of buildings in St. Clare was constructed according to an overall ecological concept. Greywater from hand washbasins, showers and sinks is treated in a horizontal soil filter and reused in water-efficient flush toilets. Rainwater is collected in two 20-foot containers and used amongst others for laundry. Blackwater is collected in a three-chamber plant, pre-cleaned and fed via a solar pump to a two-tiered constructed wetland, at which the second soil filter (size: approximately 100sqm) is fed by a mechanical lifting mechanism entirely without the use of electricity. The treated wastewater is collected in a tank and used for the irrigation of the plantations and green spaces.

Sensor lights with integrated motion detectors and energy-saving lamps reduce energy consumption. Various photovoltaic systems provide the electricity for all three pumps, the emergency lights within the buildings, the street lamps and three freezers. Twelve solar heating systems with a 300-liter tank provide hot water for showers, sinks and washing.



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