Matekiniki ekugadzira sisitimu yekufema kwedziva rehove
Kufefetera ndechimwe chezvinhu zvakakosha mukurima hove, kungave mumadziva evhu, madziva etarpaulin, madziva ekongiri, kana masisitimu akasimba akadai sebiofloc neRAS (Recirculating Aquaculture System). Basa guru reAeration nderekuwedzera huwandu hweokisijeni yakanyungudutswa (DO) mumvura, kubatsira mukuburitswa kwemagasi ane chepfu akadai secarbon dioxide (CO₂) neammonia (NH₃), uye kuchengetedza kutenderera kwemvura kuchengetedza kunaka kwemvura kwakasimba. Pasina dhizaini yakakodzera yekufema, hove dzinokurumidza kushushikana, kuda kwadzo kudya kunoderera, kukura kwadzo kunoderera, uye njodzi yekufa kwevanhu vakawanda inowedzera, kunyanya husiku kana panguva yemamiriro ekunze ane makore kwenguva refu. Nokudaro, kugadzira sisitimu yekufema hakugone kungova nyaya ye "kuwedzera aerator"; zvinoda nzira yehunyanzvi yakagadzirirwa zvinodiwa nedziva.
1. Nzwisisa zvinodiwa neokisijeni mumamiriro ehove nemadziva
Danho rekutanga nderekunzwisisa zvinodiwa neokisijeni yemhando dziri kurimwa uye huwandu hwezvipfuyo. Kazhinji, hove dzemumvura yakachena dzakadai secatfish, tilapia, pangasius, kana gourami dzinoda DO shoma inosvika 3–5 mg/L kuti dzikure zvakanaka, nepo masisitimu akasimba anowanzo tarisa 5–7 mg/L kuti chikafu chishande zvakanaka. Kudiwa kweokisijeni kunowedzera nekuwedzera kwehuremu hwehove (huremu hwese hwehove), tembiricha yepamusoro yemvura, kushanda kwehove, uye huwandu hwakawanda hwezvinhu zvipenyu kubva mukudya nemarara zvasara.
Uyezve, hunhu hwedziva hunoratidzawo nzira yekufefetedza mvura: nzvimbo yepamusoro, kudzika, chimiro chedziva, manyuko emvura, uye kuvapo kwezvirimwa zvemumvura kana matope. Dziva rakadzika asi rakamanikana rine zvinodiwa zvakasiyana zvekutenderera kwemvura pane dziva rakakura asi risina kudzika. Madziva ane tsvina yakawanda yeorganic anowanzoda kufefetedza mvura nesimba nekuti nzira yekuora inoshandisa oxygen.
2. Sarudza zvinangwa zvekugadzira: DO, kutenderera kwemhepo, uye kuchengetedzeka kwekushanda.
Dhizaini yemhepo inofanira kunge iine zvinangwa zvikuru zvitatu:
1. Chengetedza DO yakagadzikana pamiganhu yakachengeteka mukati mezuva rose, kunyanya mambakwedza asati asvika apo DO inowanzova yakaderera.
2. Gadzira kutenderera kwemvura kuitira kuti pasave ne "nzvimbo dzisina mweya" dzisina oxygen.
3. Ine backup uye security: iri nyore kutarisa, ine hurongwa kana magetsi adzima, uye haimanikidze hove nekuti magetsi acho akanyanya kusimba.
Zvakanaka kuti dhizaini yemhepo inotarisa mamiriro ezvinhu akaipisisa: kuwanda kwezvipfuyo, mamiriro ekunze ane makore, kudya kwakawanda, uye tembiricha dzinodziya. Kana mhepo ikadzikama zvakakwana mumamiriro ezvinhu akajairwa, dziva richava panjodzi kana mutoro ukawedzera.
3. Kusarudza rudzi rwemuchina wekufema uye musimboti wekushanda kwawo
Kune nzira dzakasiyana siyana dzekushandisa mhepo mukurima gungwa:
a. Chinofambisa mhepo chine vhiri rekufambisa
Mavhiri emvura anoshandiswa zvakanyanya mumadziva kana madziva makuru. Zvakanakira zvawo zvinosanganisira kuwedzera DO paunenge uchikurunga mvura pamusoro pemvura, kukurudzira kutenderera kwemvura, uye kubatsira kusundira marara kunzvimbo dzakatarwa kana akatungamirirwa nemazvo. Zvakashata zvawo zvinosanganisira katsika kekutambisa magetsi kumadziva madiki uye mukana wekuti mvura ishande nesimba kana ikasatarisirwa zvakanaka.
b. Chinofefetedza mhepo (dombo remhepo, dhisiki redhisiki)
Sisitimu iyi inoshandisa muchina wekufemesa mhepo kana kuti compressor kuti itungamirire mhepo nepaipi kuenda kumuchina wekufemesa uri pasi pedziva. Mabhuru madiki anobuda anowedzera kutamiswa kweokisijeni uye anobatsira kusimuka kwemhepo. Yakakodzera tarpaulin, kongiri, biofloc, uye madziva eRAS. Chinhu chikuru chiri mumhando yemuchina wekufemesa mhepo, saizi yemabhuru, uye nzvimbo yenzvimbo dzemhepo.
c. Chinofefetedza mhepo cheVenturi kana chinofefetedza mhepo chejeti
Masisitimu eVenturi anoshandisa mvura inoyerera kubva papombi kuti "isvete" mhepo uye iisanganise. Sisitimu iyi inogadzira okisijeni uye kuyerera kwakasimba zvakakwana, zvakakodzera kutenderera kwemvura mumadziva ekongiri nemasisitimu emapaipi.
d. Chinofefetedza mhepo pamusoro (tsime kana puropeller)
Rudzi urwu runopwanya mvura iri pamusoro, zvichiita kuti okisijeni ipinde nekukurumidza. Inoshanda kumadhamu anoda okisijeni nekukurumidza, asi kazhinji hainyanyi kunaka pakusanganisa mvura yepasi kana dziva rakadzika.
Kusarudzwa kwemidziyo hakusi kwemutengo chete; kunofanirawo kukodzera chiyero chedziva, zvinodiwa neDO, uye kuwanikwa kwemagetsi. Kune madziva madiki, ane simba, muchina wekufefetera newaya unowanzo shanda zviri nani. Kune madziva makuru, musanganiswa wevhiri remvura nekufefetera kwepasi kunogona kupa mhedzisiro yakafanana.
4. Kuverenga zvinodiwa pakufefetera mhepo
Mumunda, varimi vanowanzoshandisa nzira inoshanda yakavakirwa pakuwanda kwezvipfuyo uye ruzivo. Zvisinei, kuti muve nedhizaini inoyerwa zviri nani, shandisai misimboti inotevera:
– Kana biomass yakakwira, oxygen inodiwa zvakanyanya.
– Kana chikafu chikawanda, oxygen inoshandiswa zvakanyanya nekuda kwekushandiswa kwehove pamwe nekushanda kwemabhakitiriya anoora.
Senzira iri nyore, ronga data:
1. Huwandu hwemvura yedziva (m³).
2. Huremu hwehove hwakatarwa (kg yehove dzese).
3. Chikafu chezuva nezuva (kg/zuva).
4. Chinangwa chidiki cheDO (semuenzaniso 5 mg/L).
Tevere, sarudza kugona kwemuchina wekufema zvichibva pane zvinokurudzirwa nemugadziri (semuenzaniso, kuyerera kwemhepo inofefetera, simba remagetsi, kana nzvimbo inoshanda yekuvhara). Nekuti zvirevo zvinosiyana pakati pemhando, danho rakakosha nderekuyedza DO neDO meter. Kufefetera kwakanaka hakusi kungori "mabhuru akawanda," asi kungori kuwedzera kweDO kwechokwadi uye kwakaringana.
5. Matekiniki ekuisa mhepo zvinobudirira
Kuiswa kwemuchina wekufema kunowanzo sarudza mhedzisiro kupfuura kuwedzera simba. Dzimwe nheyo dzekuronga:
a. Dzivisa nzvimbo dzisina simba
Madziva ane chimiro cherectangular kana kuti chekona anowanzova nenzvimbo dzisingafambiswi zvakanaka. Isa mudziyo wekufema kuti ugadzire denderedzwa remvura, zvichikurudzira mvura kufamba mudziva rese.
b. Isa nzvimbo dzine hove dzakawanda pamberi
Hove dzinowanzo ungana munzvimbo dzakati (dzakadai sepedyo nenzvimbo dzinopinda mvura, nzvimbo dzekudyisa, kana nzvimbo dzinodziya). Iva nechokwadi chekuti nzvimbo idzi dzine mweya wakakwana, asi dzivisa mafungu akasimba anogona kunetesa hove.
c. Kufefetera kwemhepo kwekutanga kuti kukunde kupatsanurwa kwezvikamu
Mumadziva akadzika, mvura inogona "kuumbwa": pamusoro payo pakazara okisijeni, uye pasi payo panopera okisijeni. Kuisa muchina wekudzikisa mvura pasi kunobatsira pakusanganisa mvura yakatwasuka uye kudzivirira kuungana kwemagasi ane chepfu.
d. Musanganiswa wezvishandiso
Kumadziva ane simba guru, musanganiswa wekufefetera pamusoro (kuti mvura ipinde nekukurumidza) uye kufefetera pasi (kuti mvura igare zvakanaka) zvinowanzo buritsa mhedzisiro yakanaka. Semuenzaniso, muchina wekufefetera newa diffuser ndizvo zvinonyanya kufefetera, zvine muchina wekufefetera pamusoro sechitsigiro husiku kana mvura ichinaya zvakanyanya.
6. Isa maawa ekushanda: masikati, husiku, uye mamiriro ekukurumidzira
Kukundikana kukuru kurima kunoitika nekuda kwemazinga eDO akaderera mangwanani-ngwanani. Husiku, phytoplankton nezvipenyu zvemumvura hazvigadzirise photosynthesize, saka okisijeni haigadzirwe uye inodyiwa panzvimbo pezvo. Saka, maaerator anofanira:
– Mheni dzinobatirira kwenguva refu husiku kusvika mangwanani, kunyanya 22.00–06.00.
– Wedzera simba kana mamiriro ekunze aine makore kana mvura yatanga kukora uye kuita rima.
– Iine emergency mode apo hove inotanga "kufema" pamusoro.
Kana magetsi achidzimwa nguva nenguva, iva nehurongwa hwekuchengetedza: jenareta, UPS yemabhuroka madiki, kana muchina wekufema unoshanda nebhatiri mumamiriro ezvinhu akaoma. Dhizaini yakanaka yesystem yekufema inogara iine hurongwa hwekuderedza kudzima kwemagetsi.
7. Kubatanidzwa kwemhepo inofefetera pamwe nekutarisira kunaka kwemvura
Kufefetedza mvura hakusi kutsiva kushandiswa kwemvura. Kuti uve nechokwadi chekuti mudziyo wekufema unoshanda zvakanaka, tora matanho anotevera ekutsigira:
– Kudzora kudya: dzivisa kudya zvakawandisa nekuti kudya kwasara kunopedza oxygen.
– Bvisa tsvina nguva nenguva kana sisitimu ichibvumira.
– Chengetedza pH, ammonia, uye nitrite mukati memiganhu yakachengeteka. Kufefetera kunobatsira, asi huwandu hwakawanda hweammonia hunogona kuramba huchinetsa hove.
– Shandisa ma probiotics kana biofilters (mune mamwe masisitimu) kuti usimbise maitiro e nitrification, ayo anodawo oxygen.
Nemamwe mashoko, kufefetedza kwemvura chikamu chehurongwa hwemvura mudziva: mvura painochenesesa uye painogadzikana, mutoro wemuchina unofefetedza mvura unoreruka.
8. Kutarisa nekuongorora: kiyi yekubudirira kwekugadzira
Dhizaini yemhepo haifanirwe kumira kana michina yaiswa. Ita ongororo dzenguva nenguva uchishandisa zviyereso:
– DO meter yekutarisa DO panzvimbo dzakasiyana-siyana (pamusoro nepazasi).
– Thermometer yekutarisa tembiricha, nekuti tembiricha yakakwira inoderedza kunyungudika kweokisijeni.
– Kuona maitiro ehove: hove dzinoungana pamusoro, dzine usimbe, kana dzisingade kudya zvinogona kuva zviratidzo zvedambudziko rekushaya hove.
Edza sisitimu iyi mumamiriro ezvinhu akaoma, senge mushure mekudyisa kwakanyanya kana kuti mvura zhinji ichinaya. Kana huwandu hweDO hwadzikira, funga nezvekuwedzera nzvimbo dzinopa simba, kuronga patsva maaerator, kana kuwedzera simba remabhururu/mavhiri.
Penutup
Kugadzira sisitimu yekufemesa mvura mudziva rehove kunoda kunzwisisa zvinodiwa neokisijeni yehove, hunhu hwedziva, uye kusarudzwa kwemidziyo yakakodzera uye marongerwo azvo. Kufemesa kwakanaka hakufanirwe kuve kwakanyanya kudhura kana kuti kwakasimba, asi kunofanirwa kukwanisa kuchengetedza huwandu hweDO hwakagadzikana, kugadzira kutenderera kwakaenzana, uye kuramba kwakachengeteka mumamiriro ekunze ekukurumidzira. Nekugadzira kwakanyatsoyerwa, kutarisa nguva dzose, uye kubatanidzwa nekutarisira chikafu uye kunaka kwemvura, kufemesa kuchava "moyo" wedziva, zvichikurudzira kukura kwehove nekukurumidza uye kune hutano uye goho rinogara riripo.
Kana muchida, ndinogona kukubatsirai kugadzira muenzaniso wekugadzira mhepo zvichibva padata renyu redziva (hukuru hwedziva, kudzika kwaro, mhando dzehove, huwandu hwezvipfuyo, uye chinangwa chekukohwa).
