It is expected that we will start handing out the compost soil (by lifting loads with a loader and weighing the loads) In May 2020. The start date, days of the week and times will be specified on 17th week of April. The information will be added to our website.
Compost soil is only handed out to natural or legal persons holding a required waste permit or a proper registration certificate from the Environmental Board.
According to the Waste Act, the compost soil produced from sewage sludge is regarded as a waste (list of waste code 19 08 05). This imposes additional obligations on the user of compost soil produced from sewage sludge. The first prerequisite is holding of a waste permit or a certificate of registration from the Environmental Board. The certificate is issued free of charge and this takes 10 working days. More information can be found on the website of the Environmental Board, including a link to the application form that needs to be filled in to apply for a registration certificate. Please use the waste code ’19 08 05′ and the waste type ‘sludges from treatment of urban wastewater’ when completing the application.
In addition, the user of sewage sludge must comply with the requirements and obligations laid down in the Minister of the Environment Regulation No. 29 “Quality Limits and Requirements for the Use of Sewage Sludge for Landscaping, Rehabilitation and Agriculture”
Persons who have been issued a registration certificate must submit a report on their waste activities to the Environmental Board once a year. You can also read more about reporting on the website of the Environmental Board.
If you have a registration certificate, please e-mail it to firstname.lastname@example.org at least 3 working days before coming to pick up the soil and, if possible, inform of the time (date and estimated time) of the pick-up.
All quantities of soil to be handed out must be weighed. AS Tallinna Vesi’s truck scales allow weighing trucks with up to 40 tons of total laden weight and those up to 12 meters long. The minimum quantity that can be handed out is 0.5 tonnes. Please note that possibilities of loading the soil on a car trailer are limited (the trailer cover must be completely removed).
Transportation of compost soil can also be ordered from our subsidiary OÜ Watercom, by calling 62 62 620 or e-mailing to email@example.com. The price for the transportation of 1 load of soil (10 tonnes) with a tipper in Tallinn is EUR 55 plus VAT. Outside Tallinn, distance-based charges are applied for driving back and forth (EUR 0.58 plus VAT).
The results of the analysis taken of the produced compost soil can be viewed here.
How is the compost soil made from sewage sludge?
During the wastewater treatment process at the Paljassaare Wastewater Treatment Plant, sludge is removed from the wastewater. For sludge processing, i.e. stabilisation, sludge is pumped into digesters, using heat exchangers. In the digesters, the sludge is anaerobically fermented for approximately 15 days at ~37.0 °C. Then, by using centripresses, the digested sludge is dewatered up to 25% dry matter content. Dewatered sludge is collected in the storage tanks and transported with trucks to the composting fields.
In the composting fields, the stabilised sludge is mixed with a milled peat (in a volume ratio of ca 1:0.7), which then undergoes further aerobic fermentation in simple windrows (composting in piles) for 6 to 12 months. During this time, the windrows are mixed for 4 to 6 times with a special windrow turner. The final product is a so-called compost soil with a specific weight of ca 800 kg/m ³ (specific weight depends much on natural conditions).