Kernel Export Plant Inauguration Ceremony – HRS Digestate Concentration System

April 14, 2016 Categories: Environmental
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On 11th April, the President of Murcia, Pedro Antonio Sánchez, attended an inauguration ceremony for the Kernel Export biogas plant installed in Los Alcázares, Murcia (Spain).

The President praised the significance of the efficient biogas plant and commented: “Kernel Export is a modern company that has grown within the traditional agricultural sector and has become a true example of the Vanguard Group.”

Kernel Export, a leading producer of vegetables and salads, grows and produces over 27,500 tons of crops to include 440 tons of organic vegetables on more than 2,000 hectares of land.

The biogas plant processes more than 21,000 tons of waste annually via the anaerobic digester and will create 5,950 tons of spreadable digestate. The new AD plant already generates enough heat and electricity for 50% of Kernel Export’s on-site storage facilities. Aside from the significant financial energy savings, it is estimated that the plant will save more than 2,200 tons of CO2e each year, which is the equivalent energy used by 200 homes. The innovative system will recover 40% of the company’s energy consumption.

The plant’s biogas is created through the process of anaerobic digestion, aided by digestate processing, successfully achieved by the HRS Digestate Concentration System (DCS). The HRS DCS uses a multi-effect concentration process using forced recirculation to process the digestate, while ensuring that all the valuable crop nutrients are retained in a more concentrated form. The HRS DCS promotes environmental advantages by converting agricultural waste into energy and producing a highly valuable fertilizer.

The system will utilize the biogas generated from the AD plant for two functions: electricity production for the CHP engine and hot water generation for the boiler. The evaporator will use thermal energy from the CHP engine during the daytime (backed up by the boiler) while thermal energy will be solely obtained from the boiler in the evening.

Under local rules, unprocessed digestate cannot be applied in Murcia. However, the HRS DCS overcomes this obstacle and is a key part of utilizing the nutrient rich digestate effectively. The innovative system has been designed to reduce the volume of material to be stored and transported (55 tons per day) while maintaining its value as an organic fertilizer. Concentrated digestate will be used as a biofertilizer, while the water removed from the process will be cleaned and utilized to irrigate suitable crops such as salads and vegetables.

The project truly demonstrates how important it is to invest in the production of environmentally clean energy whilst delivering financial savings, jobs and growth for the agricultural market.

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