Treatment solutions, biowaste quantities and experiences with separate collection in Latvia, the RECO Tech 21 project experience

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1 3rd Baltic Bio Conference, 23/24 Nov. 211, Vilnius Treatment solutions, bio quantities and experiences with separate collection in Latvia, the RECO Tech 21 project experience Municipal and bio disposal in Latvia tons years Produced MW MW BW Q u a n tity o f w a s t e t Quantity of produced organic and tipe of their utilization years Sorted quantity reused quantity quantity Delivered quantity to other facility Quantity of produced, treated and utilised sludge in Latvia during (tons of dry mass per year) Produced Treated Untreated Used in agri culture Composted Incinerated 1,93 Stored Other Organic quantity disposed in landfills Total emissions from Waste sector in CO2 equivalent (Gg) Type of 25, (t) 26, (t) 27, (t) 28, (t) 29, (t) 1 4. Organic as part of unsorted Different organic Total:

2 3rd Baltic Bio Conference, 23/24 Nov. 211, Vilnius Planed results for bio streams Waste Management Plan for Latvia from 26. till 212. The stated quantities for the disposal and treatment of bio, year Waste type Result to be implemented Bio degradable ( disposed in the landfills) of biodegradable till 75% of biodegradable till 5% of biodegradable till 35 % The forecasting quantity of produced bio, t The amount of bio to be disposed, t The amount of bio to be treated, t Correlation between the disposed quantity of bio and methan gas production in the landfills year bio quantity (planed), t h. T Produced CH 4 Part of produced bio is landfilled, th., t Produced CH 4 according the plan Th., t Produced CH 4 Calculated amount of methan gas produced from disposed organic (Gg), years , , , , , , ,81 5,74 45,9 43, ,38 26,35 28,37 28, ,38 26,35 28,37 24, Planed disposed quantities ,28 44,93 45, ,23 29,66 3, ,1 19,37 16, Data of disposed ,8 46,73 47,3 47,88 48, ,38 3,82 31,25 31,61 32, ,84,12 14,4 13, Reduced quantities according the planed values , , , , , ,59 PILOT PROJECTS OF BIO WASTE COLLECTION AND COMPOSTING Collection of bio using bio degradable sacks and system - container to container The project Treatment of Biodegradable Organic Municipal Waste Using Composting Technologies ( LIFE programme 23-25)promotes the reducing of organic quantities disposed in landfills by introducing the elaborated biotechnologies for rapid and high quality composting for separately sorted and collected biodegradable streams. The main goal of the project was to create an optimal scheme for local municipalities for the separation and collection of the municipal biodegradable and to elaborate and apply appropriate composting technologies on pre industrial scale, as well as to provide the high quality compost from the biodegradable municipal. 2

3 3rd Baltic Bio Conference, 23/24 Nov. 211, Vilnius The treatment method of bio was detected by: Experimental composting of municipal household using windrows and pits Content of ; Type and extent of possible pollution; Economical aspects; Technical and technological possibilities. Composting using closed system (bioreactor) Results of the project % Seasonal variability of collected municipal bio w aste in Kekava and Stopini Municipalities Collected bio quantity in Stopini 5 mynicipality % from 3 teoretically 25 calculated 2 generated 1 municipal bio 5 quantity Collected bio quantity in Kekava mynicipality The main prepositions for bio gas production in Latvia The development of biogas production will increase the part of renewable energy sources in the total energy consumption in Latvia The usage of biogas will support the independence of Latvia in the energy market It will reduce the pollution created by unsuitable disposal of bio and emissions of CO2 and metan gas. (The program for development of biogas production, years ) Potential branch for bio gas production Farming of pigs Waste water treatment plants Disposal of Production of beverages Evaluated biogas production potential in Latvia (25 213) Characterization of facilities 23 biggest farms (>1 pigs) The central treatment plants Landfills with gas collection equipment The biggest factories of alcohol and bear production Quantity of t, Quantity of bio gas, mill.m mill. m , mill.m Planed bio gas production 95 mill.m mill.m 3 25 thousand tons 3.4 mill.m 3 Meat production Slaughter houses mill. m 3 3

4 3rd Baltic Bio Conference, 23/24 Nov. 211, Vilnius The bio gas production facilities from bio in Latvia The total energy production from biogas 7.7 MW per year: Ltd. "Rīgas ūdens" water bio treatment facility "Daugavgrīva" produce 2.96 MW from anaerobic sludge digestion; Sanitary landfill "Getliņi" (Riga district) produces 5.24 MW of energy from landfill gas; Sanitary landfill Ķivites in Liepaja region produces 45 kw of energy from landfill gas (there is planed additional generator of 1 MW). Sanitary landfill Daibe Valmiera region (~1MW) Getlini landfill gas collection station Thevolumeof biogas per year (calculated to CH4) m3 r 7811kWh There are produced 4% of energy as electricity and 46% as heat The maitinance of water sludge ( the real situation, main reasons) Composting of sludge About half of produced sludge (by dry mass) are stored and not used in spite of stated requirements after tree years of storage non used sludge must be disposed in a landfill The main reason for that is the allowance of the regulation to implement as the treatment method the long - term storage which is cheap and simple technology In the same time farmers are not interested to receive smelling and wet sludge (there is less evaporation of humidity as rainfall in Latvia) which is hard to use as fertilizer with common agricultural machines. Composting of sludge in L.t.d. Liepājas ūdens Parameters of sludge compost prepared in Ltd. Eko Terra and Liepājas ūdens Parameters of sludge compost prepared in Ltd. Eko Terra and Liepājas ūdens Parameters Heavy metals Cd, mg/kg Hg, mg/kg Cr, mg/kg Sludge compost from Eko Terra Sludge compost from Liepājas ūdens 1,1,77 54,6 1,5 1,26 75,6 Parameters Agrochemical parameters Reaction of media (phkcl) Content of organic matter in dry mass (%) Sludge compost from Eko Terra Lowest value 6,42 37,1 7,14 45, Sludge compost from Liepājas ūdens 5,68 51,9 7,77 66,3 Pb, mg/kg Zn, mg/kg Ni, mg/kg Cu, mg/kg , ,4 78,1 54,3 58,4 11 Content of nitrogen in dry mass (g/kg) Content of phosphorous in dry mass (g/kg) Dry mass (%) 13, 8, 3,3 29, 19, 5, 19,9 9,44 33,6 27, 16,5 45,7 4

5 3rd Baltic Bio Conference, 23/24 Nov. 211, Vilnius Meliorators - J Ltd. Gaujas 17, Mārupe, Mārupes nov., LV-2167, Latvia Solutions proposed by Meliorators-J within the project Composting of green and biodegradable municipal by, open air composting and composting by supplying additional air, composting in bio-reactor. The territory of composting field,2 ha and whole necessary territory,5 ha Amount of compost to be produced ~8m 3 /year Potential budget till the end of ~75. Composting site of Ltd Meliorators J in Marupe Malpils Biotechnology Center Ltd. Recycling of the sewage sludge and other natural organic using the vermicomposting CONCLUSIONS Composting of organic mater Feeding compost to earthworms Receiving vermicompost/biohum uss Multi- tonnages of municipal, wood processing and water treatment sludge can be considered as perspective organic raw materials for bioconversion as an alternative method to their disposal. The bio composting using windrows were selected as the main method for bio treatment. Till the year 212 there are planed to be built more than 5 new composting sites. ~ 1% of them are created and working at present. There are no direct legislation demands to compost production from bio and its usage. The use of bio as new bio mass resource can facilitate the green energy production in our country and to be one of the possibilities to implement the decision on replacing fossil fuel for renewable materials in the EC. 5