Integrated bio-waste handling system in Vysoké Mýto
After several months of pilot operation and tuning of necessary operation details of the new fermentation station, the town of Vysoké Mýto launches the integrated system for handling of biological waste in the region. The fermentation station – the key building stone of the entire system will enable evaluating the sofar unused energy potential which is hidden in the production of bio-gas.
At present, the usage of renewable energy sources, including also biological waste and biomass, is a very often discussed issue. Biological waste includes materials which are produced during everyday activities of a large number of companies. They come from the maintenance of public green areas, wastewater treatment, public catering, production of foodstuffs and, last but not least, also from households. Usable waste ends inefficiently on waste heaps, at composting facilities, cafilerias or incineration plants, and they often are a heavy burden for the environment.
The idea to build a bio-gas station in Vysoké Mýto began to be born in 2004. It was inspired by similar biologically degradable waste handling systems working especially in Denmark and Sweden.
The basic aim of the project is to create an integrated biologically degradable waste handling systems in the region, including solution for the communal as well as private spheres. This system ensures collection of biologically degradable waste in Vysoké Mýto, collection and transport of biological waste from businesses and their processing in bio-gas station. 379 special collection bins placed in the residential area will enable collection of biological waste from households. Processing of kitchen waste from restaurants is another important part of the system. Environment-friendly removal of these materials was newly regulated in connection with our accession to the European Union, but the region does not dispose of the sufficient capacity at present. Other facilities will be gradually included in the waste collection system, such as school catering, company catering, restaurants and other entities.
The core of the entire system is the bio-gas station with the capacity of about 8,000t of waste per year. The station is located at the wastewater treatment plant in Vysoké Mýto and it enables narrow inter-connection of both buildings and allows processing of the sludge sediment. In the station, the bio-gas is generated from biologically degradable waste during managed process with barred air access. The bio-gas is then burnt in two cogeneration units, each with a capacity of 160 kW. In this way, power and heat is generated. Electricity will be sold to the electricity grid at the price guaranteed by the state, and the heat will be used in technology. Possible excessive heat will then be used for heating of the wastewater treatment plant’s buildings – replacing an old coal-powered boiler house. Special crushing and sanitation units allow the health-safe procession of waste. The entire technological system is placed in a closed building equipped with air handling technology and odour-absorbing bio-filters. The bio-gas station also produces fermentation residue that will be used in composting, or directly for fertilization of land.
From the beginning, the integrated system project enjoyed a really wide support. In 2005, an application for a subsidy from the Infrastructure for the Environment EU operation program was prepared. The project succeeded and won an EU subsidy covering 75% of total recognizable costs and also a 15% support from the State Environmental Fund. The Pardubice region also financially supported the project. Total project costs amounted to CZK 75 million, of this ca CZK 69.5 million went to the fermentation station. In 2006—2007, a tender for the project’s builder and supplier of the refuse vehicles were in progress. The consortium of companies VCES a.s. and KUNST, spol. s r.o. called “Sdružení Vysoké Mýto“ won the “construction part“ of the tender. The construction began in May 2007 and was completed in January 2008; it was followed by a pilot operation.