JM Social Icons

    Solar milk pasteurizer improves smallholder farmer profits

    solar pasteurizer.JPG

    Using a solar milk pas­teur­izer, small­holder farm­ers seek­ing to min­im­ize milk losses along the mar­ket­ing chain es­pe­cially in the arid and semi-arid lands has been de­veloped by the Kenya Ag­ri­cul­tural and Live­stock Re­search Or­gan­iz­a­tion.  The new tech­no­logy will help milk farm­ers and busi­ness vendors pro­long the shelf life of milk and hence im­prove mar­ket- abil­ity and gen­er­ate more in­come.

    Milk mar­ket­ing is an im­port­ant in­come earn­ing op­por­tun­ity for people in the arid and semi-arid lands (ASALs) of Kenya. For a long time, farm­ers have been using lim­ited fire­wood to boil the milk hence pla­cing in­tense pres­sure on the forests and des­troy­ing the en­vir­on­ment.

    READ ALSO:  Simple Solar tech­no­logy for ir­rig­a­tion saves water & fer­til­izer costs

    The solar milk pas­teur­izer con­sists of a flat-plate water heat­ing solar col­lector and a stain­less steel cyl­indrical milk con­tainer. Water in the solar col­lector is dir­ectly heated by the sun and the hot water pro­duced used for pas­teur­iz­ing milk.  

    Ac­cord­ing to Marsabit KALRO of­ficer F.​Wayua, the abund­ant solar en­ergy in ASALs can be used to pas­teur­ize milk. A simple solar milk pas­teur­izer can be made loc­ally with the aid of jua kali ar­tis­ans. The ma­ter­i­als re­quired for fab­ric­a­tion in­clude a flat plate solar col­lector, a stain­less steel cyl­indrical tank, con­nect­ing pipes& valves and in­su­lat­ing ma­ter­i­als (fiber glass, cot­ton, wool and saw dust). The ma­ter­i­als can be ob­tained from nat­ive hard­ware shops close to the farm­ers’ res­id­ence.

    READ ALSO: Solar and wind hy­brid drier saves food

    After as­sem­bling and the device is ready for use, it is ad­vis­able to tilt the solar col­lector at 10-15° from the ho­ri­zontal, fa­cing the equator. En­sure you have good qual­ity milk to be pas­teur­ized and a piece of clean sterile (boiled) cot­ton cloth.

    READ ALSO: Solar powered mini silos tames grain loss

    Pro­ced­ure for Milk Pas­teur­iz­a­tion

    • Pas­teur­iz­a­tion should be done between 10 am and 4 pm when there is ad­equate solar ra­di­ation
    • Fill the sys­tem with water in the morn­ing
    • Sieve milk using the cot­ton cloth
    • Pour the sieved milk in the milk con­tainer
    • Water in the solar col­lector is dir­ectly heated by the sun
    • The hot water pro­duced is used for pas­teur­iz­ing milk in the milk con­tainer
    • Cir­cu­la­tion of hot water from the col­lector to the jack­eted milk con­tainer con­tin­ues as long as the sun is shin­ing
    • Let the milk heat to 63°C and hold for 30 minutes or 85°C (when it starts to foam) and hold for 5 seconds.

    The device is re­com­men­ded for pro­du­cers and milk traders in arid pas­toral areas as they have lim­ited ac­cess to grid elec­tri­city but have plenty of solar ra­di­ation. Milk Pas­teur­iz­a­tion makes milk safe for human con­sump­tion.

     For more in­form­a­tion con­tact: Centre Dir­ector, KARI Marsabit P.O. Box 147 – 60500 Tel. 069 – 2040 Wire­less: 020 801 7018 Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

    Comments powered by CComment

    Editor's Pick

    News Feed

    Powered by mod LCA

    Sign Up

    Sign up to receive our newsletter
    FarmBiz Africa © 2020