Lettuce Farmer

Green Gas from Green Waste

B-Four Agro is a company that grows different kinds of lettuce for supermarkets in the Netherlands. With the building of ‘B4-Energy’, it aims to produce two million Nm³ green gas per year. In due time, 1,500 Dutch households in the area can benefit from it. B four-Agro consists of an anaerobic digester and an upgrading plant on its property in Warmenhuizen. For input and feedstock, the digester will use 16,000 tons of biomass per year, coming from agricultural waste streams from B-Four Agro and agricultural companies in the area. After digesting, which takes about twenty days, the biogas will be upgraded by a Carborex®MS biogas upgrading system to pure biomethane. This green gas will be injected in the local grid to provide households, as well as greenhouses and the B-Four Agro systems at the end of 2016. Fun Fact: ‘Warmenhuizen’ stands for ‘warm houses’.