Luuk Gollenbeek

Biography

After my Master Soil Science at Wageningen University I worked for a consultancy company (Tauw) as a soil remediation specialist. During this work I dealt with research on soil and water pollution and with remediation technologies (for instance digging, groundwater pumping and water treatment, chemical oxidation, biological remediation). In my current work at the WUR Livestock Research I am focused on manure and water management on livestock farms, and try to contribute to the development of economically and/or environmentally more sustainable systems/technologies. With knowledge and effort of partners in the whole chain manure can be made valuable again.

 

Abstract

Farming and Circular Economy

Manure refinery – solution for closing the mineral cycle

Luuk Gollenbeek

After my Master Soil Science at Wageningen University I worked for a consultancy company (Tauw) as a soil remediation specialist. During this work I dealt with research on soil and water pollution and with remediation technologies (for instance digging, groundwater pumping and water treatment, chemical oxidation, biological remediation). In my current work at the WUR Livestock Research I am focused on manure and water management on livestock farms, and try to contribute to the development of economically and/or environmentally more sustainable systems/technologies. With knowledge and effort of partners in the whole chain manure can be made valuable again.

Manure and beyond

Manure is a valuable fertilizer, a good source of nutrients and organic matter. Because of the surplus and the danger of pollution, regulations by the European Union and the Dutch government put a ceiling on the use of phosphate and nitrogen. Therefore these nutrients must be used efficiently within a closed circle (utopia). In order to do so the manure quality needs of the national and international agriculture must be inventoried, and by refinery needed manure products can be composed. The purpose for the long time is to obtain nitrogen and phosphorus in such a form that they are applicable as (raw material for) artificial fertilizer.

Livestock Research has got experience with:

Pig manure is a good source for making export products (relatively high nitrogen and phosphate content). This is a change to decrease the tension on the Dutch manure market. Stimulating export of nutrients will raise the question to closing the mineral cycles on macro/international scale.

Because the dairy manure is suitable for the national Dutch market (relatively high carbon and low phosphorus content) we believe that initiatives for dairy manure will aim at adjusting the manure to the local needs, at farm or regional level. Separate collection of urine and feces in the buildings, direct removal of the manure, mechanical separation and manure refinery are processes that we have in mind. In that way suitable products for the own farm (with grassland) and the neighbour arable crops are produced from the manure and the mineral cycles are closed as much as possible!

 


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