AGRO-EKO s.r.o.

Obecni 811,Albrechtice,Czech Republic,Czech Republic

Free Member

EWA Aerobic Fermentor

Czech Republic


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Product Description

EWA Aerobic Fermentor is the certified technological equipment for processing of all types of biodegradable waste (BDW), including sewage sludge and animal by-products in accordance with the EU Regulation no. 1069/2009 EC.


EWA fermentor consists of thermically insulated operation space, system of injectors for intensive airing of the fill, system of fill shovelling consisting of segmented floor and flight-bar conveyor placed on the inside of the fermentor, and integrated device for loading and unloading. All technology points are placed inside ISO 40track container (ALL IN ONE).

EWA fermentor is protected by edict, doc. No. 295922. On November 16, 2005 an application was handed in at European Patent Office (EPO) named The method of conversion of biodegradable hygienically non-stabilized substrate into hygienically stabilized product. Beside this patent, four utility models, also registered by the PV (Industrial Property Office) are used for the production of the fermentor. The fermentor is certified by State test-room of agricultural, forester and food-processing machinery in Prague, Certificate No. 6/2006, dated May 30, 2006.


Mixture of biodegradable waste and structural (liquid-absorbing) biomass is loaded in the operation part of the fermentor. Optimal fill humidity (50-60%) and disposal of air oxygen activate the metabolism of aerobic bacteria. Aeration of the fill is done by airing and shovelling inside the fermentor. High level of metabolic activity and simultaneous reproducing of bacteria is demonstrated externally by rising temperature of the fill. Intensive thermofilic aerobic fermentation runs under the same conditions in the whole fill section. This accelerates composting processes. Complex organic matters are decomposed and transformed into others. Turbulent biological oxidation runs in the fermentor due to ideal conditions. The fill temperature rises above 70ºC and proteins are gradually denatured. High fill temperatures for defined time period cause inactivation of present bacteria and pathogenic organisms (viruses, bacteria, leaven, mould, protozoons, and worms). This process is called thermofilic aerobic stabilization and hygienization of the fill. Due to high temperature the number of microorganisms is decreasing and weed seeds loose their germinating capacity. Continuing fermentation at temperatures around 50ºC and intensive fill airing enable so-called biological final fill drying.Common mixing rate is 30% weight ratio units of sludge component and 70% weight ratio of biomass. If the biomass humidity is low (straw, wood-shavings) the mixing rate can be up to 50:50. The unloading humidity of the fermentate used for compost production is about 40%. If the fermentate is intended for energetic purposes the final humidity is usually below 30%. The time of fill delay in the EWA fermenter depends on the character of the fill and the final product. It takes 48 96 hours.


After the thermophilic aerobic fermentation is finished the fill is stabilized and hygienized. As its qualities have been essentially changed it is further on called fermentate. It can be used as compost for agrotechnical use or compost for energy use (biofuel).

  • Compost for agrotechnical use (mulch-compost)

Mulch-compost is produced by a process of controlled aerobic composting (thermophilic fermentation). It is a mixture of agricultural and forester biomass with compostable waste. Its structure is fibrous even crumby with noticeable undegraded pieces of biomass (straw, wood chips, bark). Its color is brown or brown-grey, at the production humidity it is loose it smells like mushrooms or humid forest. Certification of the product was done by CZ BIOM, Biomass Association Prague.

Compost for energy use (biofuel)

Compost for energy use is a fermented mixture of BDW, made according to company standards, in accordance with Decree No. 5/2007 Coll. consisting of the BDW (see catalog biowaste Decree No. 341/2008 Coll.)


The company standards provides standard production process, the range of s, the maximum values of controlled substances, quality attributes and recommended ways of use.


Fuel is intended for combustion in boilers for solid fuels. It is suitable for biomass boiler systems, but also for coal-fired boilers. Fuel can be used in the grate boilers, but very good results are achieved by burning in boilers with fluidized bed. Incineration may be carried out individually or in combination with fossil fuels. Produced fuel usually comes in bulk form. Compost for energy recovery has crumby, lumpy and fibrous structure; the color is brown to dark brown. In the mixture the components of biomass are obvious - parts of plants, bark, branches, etc. The maximum length of the individual pieces of the biomass is 50 x 50 x 50 mm, very thin twigs may be up to 100 mm length, occasionally up to 200 mm.

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AGRO-EKO s.r.o.

Contact Person

Mr. Petr


AGRO-EKO s.r.o.


Obecni 811, Albrechtice, Czech Republic, Czech Republic,73543




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