Good Practice in Composting Plant - LIPOR
Technical Good Practice The new composting plant has the capacity to treat 60,000 tons of organic waste per year. The waste arrives by truck from separate collection schemes for the organic fraction from large producers (restaurants, supermarkets, markets, and some selective collection at the domestic level) and separate collection schemes of green waste. The careful selection of organic matter for composting and in the production of the compost is very important and is a key aspect for the viability and success of the project. The actual compost plant is closed and in depression. Because of this, all air is sucked inside even when a door is open and the odour problems outside are minimalized. The odour treatment has a capacity to treat 410,000 Nm3/h and consists of two air washers with individual capacity of 200,000 Nm3/h, followed by a biofiltration system with a total area of 3,130 m2, which involves 18 biofilter sections full of wooden roots as a filling material. The treated air extraction system has 3 vertical ducts equipped with axial fans. The conditions of humidity and temperature for each biofilter is controlled to allow the microorganisms to work at an optimal level. Every three years the biofilter material is changed and the roots that are removed are shredded and sent to the composting plant to produce compost as a carbon source. The exchange of the material of the biofilters is made in two phases to allow the treatment system to continue to work and minimize the impact.