Biogas and Plant Production

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Transcript of Biogas and Plant Production

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    How that powerplant idea developed. First, main issue in organic farming nitrogen.

    Large precentage of it comes from the air, xed by legume bacteria. So every ve-

    six they grove clover grass. arlier it was a habit tu cut clover !-" times a year and

    leave it on the eld. #ut that wrong step-next generation of clover grow bad and

    also nitrogen is wasted by evaporation. $welve years ago they got idea of processing

    clover grass into heat and electricity, and as a residue they have biogas slury as avery valuable fertili%er which they wouldn&t have otherwise. 'nd it&s a good circle-

    thrown into the box, move up by elevator to digester with temperature inside of

    "()*, and it+s full of methanogenic bacteria, i.e. bacteria that produce methane out

    of organic matter. $he biogas contains ( of mathane afterwards stored in rubber

    tent and the engine burns the biogas lie a diesel engine, produces energy with a

    generator and produces lie nusproduct heat that can be used to heat the ob/ects on

    the farm and also to dry grains in summer time when they harvest it.( Material-

    clover and grass cut and putted into the silo). $he second component they put

    is a menure and every day is taen and putted into digestor so there are no big piles

    throghout the farm. First 0-! years they relayd only of these two components but

    they reali%ed it+s not easy to digest it-bery, pumping it di1cult, nitrogen transforms

    into amonia which poisenous for bacteria. so aditionally they are using corn silage-

    the risult very good, great improvement in digesting process so nowadays they put

    abot ( of it into digestor every day. 0 ha of corn on their own farm (silo).$hat+s

    good because otherwise they should buy corn silage, even non organic allowed to

    certain grade, but that permitted percentage gets lower by the regulations every

    year. *arbo-hidrates 2corn34#acteria don+t lie variation in feed- they prefer same

    ingredients, same $, same movement-so every cut get silaged, cut it young because

    digestability than higher abou !(-" ha of clover and grass enough to run the whole

    year, electric power 5( 6, small biogas plant. #ecause in 7ermany can be nd of

    ( or even 896, but they run with corn silage mainly.conomically, they try to produce more grain but if they notice higher infection with

    hisle or ducweed they leave it for 0 years, the more you cut it better ght against

    weeds. #ut grain-sell, feed pigs. *lover grass silage-80 t, manure !-" t

    manure, 0 t of corn silage

    8 of electricity used on the farm, rest sold to public energy system, to the grid.

    $he maintenance payed by sold energy. *ontrators for energy, pipe building were

    present at the beginning but they helped them in construction. :owaydays 5

    percent in feed corn-en%imes;chop grass very small. First cut (-8-th of 9ay, on

    some of elds envieromental programme, payed to cut later, but that is abot ( ha

    and other without care of birdsLittle bit more of half-human consumption. $riticale, beans, peas-pig. $otal 8

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    nitrogen-not on hot, sunny day, special machines tubes, and put rain water to mae

    it more li=uid more available to plants

    6heat ld-one wee ago seeded, before that clover and grass. #ecause wheat and

    spelt have high demands for nitrogen that+s why planted after clover. where the

    wheat is not still germinated to the surface, it is beove the ground against the weeds

    used comb harrow-blind howing.Spelt eld-$hree days ago, with spelt not nude. $hey plow the remainings of clover,

    than prepare seed bed with rotating harrow for the grains. So move remainings to

    prevent it growing further.

    $hree di>erent types of old species-spelt $.spelta , emmer $.dicoccum, einorn $.

    monococcum-the oldest type of these curious, he thins is not high yield but some

    baers lie to put it in the bread and pay high price. :aturland sells to baery they

    mill it byself. Spelt in higher ammounts. mmer at rst used summer, full of wheat-

    they multiply it now on the farm. inorn seed in northern 7ermany bought.

    :ot problem of lodging, and eiorn even more and thay tae care of amount of

    nitrogen.

    Soil compaction usually big issue on the elds-small as possible tractors with wide

    tyres for placing the pressure, for easy wors, but can+t be avoid there is slury tan

    8 cubic meter, combines for harvest,choppers for grass and clover-very heavy. Soils

    vunerable to compaction-wet in under soil, loamy and must tae care. $he clay

    increases with the depth. *ertain share of silt, less silt here. From the olders ice ages

    so share of lime lower. *a bridges mae fractions stabile-bring lime. ?oc fosfate "-(

    " g per ha lie fertili%er, compensation fertili%ation for what is taen. @hosphorus

    in pelates, desolves in ground.

    @ests-beans aphids, not problem, fungi rust sometimes, crop rotation prevents and

    also crop density is not high, air movement, higher varieties away from soil

    :o cover crops, because winter grains. An summer legumes, oat, part of triticalesummer. 'void so much in winter, but eg $riticum in winter more yield. *over crops

    before summer crops-in past years legumes, then had problems with fungi so had

    problems in beans with root fungi because they related. *over c facelia, niger seeds,

    grasses, raddish, sunBower, bucwheat.0(-! max legumes, even if they needed,

    and from slury enough :.

    ?otationC *lover and grass-wheat or spelt-triticale, ruy or oat, not hungry Dbeans or

    peas, after 0-! years-one year of triticale or ruy. So in (-5 years again clover.