Enox Sp. z o.o.
ENOX Sp. z o.o. is an engineering and executive company established to develop and implement solar drying technology for sewage sludge. The proposed solution was developed by a team of specialists from the University Research Center of the Warsaw University of Technology (UCB) and is still being developed to meet the market requirements. ENOX Sp. z o.o. can deliver complete technological solution including all equipment as well as realize turnkey projects. The increase in the mass of generated sewage sludge observed over the past years and the prohibition on the possibility of their storage makes the management of municipal sewage sludge a very important ecological, technical and economic problem.
The technology developed at UCB Warsaw University of Technology assumes as a basis the use of sunlight energy in properly constructed halls allowing the greenhouse effect to take place. The halls are equipped with the following installations:
heating installation powered with heat from external sources (option),
automation and control system,
One of the key equipment of the technology is the control system, including the ventilation control system. The ventilation system control algorithm is responsible for switching on the exhaust fans to exchange the air inside the dryer. The control algorithm allows optimal air movement in a solar drying hall regardless of local atmospheric conditions. The key parameter is the potential for moisture collection of the drying air. On the basis of measurements of temperature and humidity of the air outside and inside the dryer, the drying potential of external and internal air is determined. The internal air potential (usually heated but with higher humidity) is compared with the outside air potential (usually cooler but more dry). If the internal air potential is higher then the air should not be exchanged inside the dryer. Otherwise, the exhaust fans responsible for the air exchange in the dryer should be temporarily turned on. Control system is based on programmable controllers that manage the whole drying process.