Bunnik Plants in Bleiswijk , the Netherlands , is recognized as zero drainer . In the public lecture with DCMR Milieudienst Rijnmond , the Waterschap Schieland and Krimpenerwaard , the pot industrial plant companies have been able-bodied to demonstrate they are not draining waste water . Nick van der Berg , cultivation specialist at Bunnik Plants , is closely involved in all talks : " The authorities have let us know in writing that it is believable that we do not run out waste material water . We are happy with this recognition as zero drainer . " By zero draining , the company wants to spare the environment totally , and it fits the aspiration to grow without artificial fertiliser and insecticide , but with more resistivity in 2020 .

Weekly 700,000 plant are grown sustainably on average on more than 25 hectare . The assortment comprise of 50 different kinds of indoor plants , principally light-green industrial plant but also bloom one . Of the six growth locations , three are equipped with drum roll container and three with concrete floors , but all have a low / in high spirits lunar time period system to leave water . The issue piddle is filtered because of constitutional befoulment by a screen bend .

Underground water storageThe irrigation piss is 100 % rain , which is accumulate in basins inside and outdoors . At three locations , the residue piddle is stored underground . The underground water storage happens at four depths : 10 , 20 , 30 , 40 meter . The outgrowth specialist : " In case of urine shortfall , we first pump piss from the deepest layer . When the pumped up water begin too much salt concentrations , we interchange to a higher lever . " The pump up piddle is UV disinfected , and is stored in the rain water basin .

" We aerate both the rainwater water and the grim / high tide return key water . Because of the high oxygen content , there are less pathogens , food oblige better to the water , and alga increase is countered . "

No large adjustmentsVan lair Berg : " Because multiple locations were already closed because of the low / high tide organisation , zero drain was achievable with a few alteration . Because of the system , we did not have to do large readjustment . The most important adjustment was the filter system of the automatic washer for the pealing container . Because of the crop protection agents used in the ontogeny , the rinsing water system of the container washer has to be filter fine to be reused . The screen bend for the constituent pollution has been supersede by a vibrating screen , which can filter up to 20 micron .

Another allowance was the collection of the condense water system of the greenhouses . The growing specialist : " Before , the distil weewee was collected in the silo for the regaining water , but now it is stored in an separate silo , making it traceable " . A few tubes , which run to the ditch , and served for the overflow of basin , have been glue shut . The flood now goes to a silo that was not in use .

Putting everything in writingBunnik Plants has chosen to keep reporting in their own management and not rent a consultancy agency , to get an even better insight in the water rain buckets at the various locations . Per location , the polish specialist has had to roll up an entire book for the sureness , curb everything on zero draining . " They observe run low on the upkeep program . You have to serve questions , what do you do with leaking container or drain gutter ? Has the personnel been instructed ? You have to describe that you first alarm your own technological serving , and only then an international ship’s company "

grow sustainableAt Bunnik Plants they conceive in sustainable and environmentally creditworthy growing . To come across their vim requirements , they use more than 9,000 sun collector , mostly attached to the company building . Together with their own biomass industrial plant , which combust wood chips and crop cutting , the generate electricity is sufficient for 4,000 household . The waste matter heating plant from this , and from the RoCa - plant , heats the glasshouse .

The ontogeny specialist conclude : " In the coming time we are fit to grow more opposition , so we can do without artificial plant food and insecticides . We still have to take a few more step next twelvemonth to see if it is realizable . "

rootage : Glastuinbouw Waterproof