Cambi AS delivering technology to the new sludge treatment plant for Lindum aS in Drammen, Norway

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Source: Cambi Group AS

”This is an important contract for Cambi”, says Per Lillebø CEO in Cambi. Main contractor for the process plant is division Purac at Swedish Läckerby Water. “Cambi’s process is based upon Thermal Hydrolysis (THP), and this is the key to securing a high production of biogas and a fertilizer of good quality. Cambi has development a compact solution for the THP which has a large international potential for treatment of sludge,”states Lillebø.

Cambi has so far built 20 THP-plants worldwide with 5 new plants currently under construction. Several of these contracts were achieved in direct competition with large international companies within the environmental technology sector.

The plant in Drammen is designed to treat approx. 20,000 tons of sludge from municipalities in the Drammen region, together with some grease and septic. The biogas produced at the plant, will have an energy content of 16 GW per annum. The energy could be used for either cogeneration or as fuel in vehicles. The digested sludge containing both food substance and organic material is dewatered into a high-class pasteurized fertilizer for direct application to agricultural land.

The total contract cost is 80 million NOK, including civil work and process elements. ENOVA will support the project with 8 million NOK. The groundwork will commence at the end June, and the plant is scheduled to be finished in the second half of 2011.

Swedish Purac will be delivering the receiver unit as well as digester equipment. They are also responsible for post treatment of the digested sludge. Cambi will be delivering the main elements in the process as part of the patented thermal hydrolysis process (THP). The process involves pre-heating the sludge for a fixed period of time before the sterilized sludge is passed rapidly into the flash-tank resulting in cell destruction from the pressure drop. The sludge is then cooled before being fed into the digesters, where it is more easily digested due to cell destruction. The high temperature of the THP process eliminates all pathogens and the end product is a fertilizer suitable for use on agricultural land.

With this new plant in Drammen, Lindum will achieve their goal of producing biogas from sludge and waste. The plant will be a solid fundament in Lindums emphasis on the treatment of bio-waste and sludge in the region. This is due to the fact that you achieve a sustainable and environmentally friendly solution, that both treats waste and sludge producing energy and nutrients for recipients in the region.

Cambi AS is a Norwegian company located in Asker. Lindum and Cambi see great potential in forming a closer working relationship, something that has been made possible through this project.

The THP process is especially suited for used in large projects such as the water treatment plants in Brisbane, Brussels, Dublin and Manchester.

The latest innovation to the Cambi THP range is the development of a compact version of the THP aimed at medium sized waste water treatment plants. This compact version makes the Cambi THP technology very competitive for treatment plants as low as 100,000 inhabitants. The addition of the compact THP opens up a whole new market for Cambi both in Norway and internationally.

Cambi proven THP technology customer base has had another boost, recently securing large contracts in both England and South America. Cambi plants worldwide now treat sludge and biowaste for over 19 million people. The plants produce biogas equal to 1,200 GWh of thermal energy which is used to produce approximately 480 GWh of electricity. This is an important contribution for the renewable energy supply.

Alternatively the biogas could be used as an alternative fuel for vehicles. Sweden has already established a network of over 100 bio-fuel stations. The use of biogas in vehicles results in much lower emissions of harmful exhaust gases than gasoline or diesel; in addition it is CO2-neutral. Biogas today is recognized as the most environment friendly fuel.

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