Izitsha ze-Anaerobic Digester: Ubunjiniyela, Ukuklama, kanye Nokukhethwa Kwezinto
Kwadalwa ngo 2024.12.04
Amadijesta Angenawo Umoya: Ubunjiniyela, Umklamo, kanye Nokukhethwa Kwezinto
I-anaerobic digester (AD) tank iyisiqukathi esivaliwe, esingenamoyaphi esiklanyelwe ukwenza lula ukubola kwezinto eziphilayo. Ngokugcina izimo ezithile zemvelo, lezi ziqukathi ziguqula udoti wezinto eziphilayo (umquba, udoti wokudla, udoti wamanzi angcolile) ube yi-biogas (i-methane ne-carbon dioxide) kanye ne-digestate enothile ngamaminerali. Umklamo we-tank uyisisekelo sesitshalo esiguqula udoti ube amandla, uthinta ngqo inani le-methane, isikhathi sokusebenza, kanye nezindleko zokuba nayo (TCO).
1. Amapharamitha Ayisisekelo Ezingcweti
Ukuklama i-AD tank kudinga ukulinganisa izidingo zezinto eziphilayo nezidingo zesakhiwo. I-tank ayiyona nje imvilophu; iyindawo elawulwayo.
● Isikhathi Sokugcinwa Kwamanzi (HRT): Isikhathi lapho izinto eziphilayo kumele zihlale khona etankini ukuze zibole kahle. Umthamo we-tank kumele ubalele ngokusekelwe emanzini ansuku zonke aphakelwayo aphindwe yi-HRT edingekayo.
● Ukulawulwa kwezinga lokushisa: Izinto zokugaya zisebenza kumazinga e-mesophilic (35°C) noma e-thermophilic (55°C). Amathangi kufanele afakwe uvolo ukuze agcine lezi zingqikithi, ikakhulukazi ezindaweni ezibandayo.
● Ukuxubha nokugudluza: Ukuze kuvinjwe ukwahlukaniswa (izinto eziyigobolondo ezintantayo noma ukuqoqeka kukadaka phansi), ithangi kufanele libe nezinhlelo zokuxubha ezihlanganisiwe ezisebenza ngomshini noma ngamanzi ukuze kugcinwe i-biomass ihlangene.
2. Ukukhethwa kwezinto: Ukuhlola ingqalasizinda yethangi
Ukukhethwa kwezinto kunquma impilo yethangi, umjikelezo wokugcinwa, nokumelana namakhemikhali.
A. Ingilazi-Ehlanganiswe-Nesitimu (GFS/GLS)
Amathangi e-GFS ngokwanda kakhulu ayindlela ejwayelekile embonini yezitshalo ze-AD.
● Izinzuzo: Ukumelana namakhemikhali okungcono kakhulu kumvelo ye-acidic ye-digestate, ukufakwa okusheshayo ngenxa yomklamo ohlanganisiwe, ohlukanisiwe, kanye nomhlaba ongabonakali ovimbela ukuqoqwa kwe-biofilm.
● Isimo Sokusebenzisa: Sifanele imfucuza kamasipala, imfucuza yokudla, nezindawo zokwelapha amanzi adingeka emizini.
B. Ukhonkolo Olunqotshiwe
Ukhonkolo uvame ukusetshenziselwa izindawo ezinkulu, ezisemhlabeni, noma izindawo ezinkulu zokugaya.
● Izinzuzo: Ubuqine obukhulu besakhiwo, amandla amahle kakhulu okugcina ukushisa, nokufaneleka kwamamitha amakhulu kakhulu.
● Indlela Yokusebenzisa: Amadijesta ezolimo anomthamo omkhulu noma izindawo lapho ithangi lizongcwatshwa kancane noma ngokuphelele.
C. Insimbi Engagqwali
Isetshenziswa ikakhulukazi ezinhlelweni ezikhethekile kakhulu noma izingxenye zangaphakathi.
● Izinzuzo: Ukuqina okuphezulu kokugqwala kwezinto ezithile eziyingozi.
● Indawo Yokusebenzisa: Ivamise ukusetshenziselwa amathangi amancane esibili noma amathangi aphatha imifudlana kadoti enesibindi/enomuncu kakhulu.
3. I-Matrix Eqhathaniswayo: Ukufaneleka kwezinto zethangi
Isici | Ingilazi-Ehlanganiswe-Nesitimu (GFS) | Ukhonkolo Oqinisiwe | Insundu Yokuhlala |
Ukumelana Namakhemikhali | Kubalulekile (Akunabungozi) | Kulinganiselwe (Idinga i-Liner) | Kuphezulu |
Isikhathi Sokufaka | Okusheshayo (Okuyimodular) | Okuhamba kancane (Ukuthulula Nokuvumela Ukuqina) | Okulinganiselayo |
Ukugcinwa | Kuncane Kakhulu | Okulinganiselayo (Ukulungiswa Kwezikhala) | Kuncane |
Isikhathi sokuphila | Iminyaka engu-30+ | Iminyaka engu-40–50+ | Iminyaka engu-30+ |
Ukukala | Okuphezulu (Okunwetshwayo) | Phansi (Kumi-beke) | Phakathi |
4. Izici Ezibalulekile Zokuklama
Kungakhathalekile ukuthi yiluphi uhlobo lwezinto ezisetshenzisiwe, ithangi le-AD elisebenza kahle kumele libe nalezi zinhlelo:
1. Uhlelo Lokubamba Igazi: Uphahla lwethangi kumele lungangeni moya ukuze lubambe i-methane. Imiklamo eminingi yesimanje isebenzisa i-Double-Membrane Gas Holder efakwe phezu kwethangi ukugcina igazi ngenkathi futhi inikeza isitembu somfutho.
2. Izimbobo Zokudla Nokukhipha Amanzi: Zakhelwe ukuvimbela ukuminyana. Izinhlelo zokudla kumele zikwazi ukubhekana nokuqukethwe okunamalulwane (Total Solids noma i-TS%) we-substrate.
3. Ukuphepha Nokukhulula Umfutho: Ngoba i-biogas iyavutha futhi inomfutho, amathangi kumele afakwe izivalo eziphindwe kabili zokukhulula umfutho/i-vacuum (PVRVs) ukuvimbela ukugoba ngaphakathi noma ukuqhekeka.
5. Imibuzo Evame Ukubuzwa (FAQ)
Q: Kungani ithangi lami lokugaya likha isikhumba phezulu?
A: Ukwakheka kobumba ngokuvamile kubonisa ukuxubeka okunganele noma ukungalingani ku-feedstock. Uma uhlelo lokuxuba (i-agitator) lungafinyeleli kuwo wonke umthamo wethangi noma lingenamandla ngokwanele ku-viscosity ye-substrate, ama-solids organic azogeleza, adale ungqimba olungaphezulu oluvimbela ukukhishwa kwegesi.
Q: Yini umehluko phakathi kwamathangi okugaya ayisisekelo nawesibili?
A: Ithangi lokugaya eliyisisekelo yisithuthukisi esisebenzayo lapho kwenzeka khona iningi lokuhlukana kwe-organic nokukhiqizwa kukagesi. Ithangi lokugaya lesibili (ngokuvamile ithangi elivulekile noma elilula) lisetshenziselwa ukugcina, ukuzinza kwe-digestate, nokukhipha okokugcina kukagesi osele.
Umbuzo: Ingabe "Ivala igesi" ifana "Nokuvimba umoya"?
Impendulo: Yebo. Ukugcina imvelo engenawo umoya ngokuphelele kubalulekile. Noma ukuvuza okuncane kungangenisa umoya-mpilo, okuyovimbela amagciwane akhiqiza amagesi (izilwane ezincane ezikhiqiza i-methane) futhi kudale ingozi yokuqhuma.
Ukukhetha ithangi elifanele lokugaya okungenawo umoya kuyisinqumo esihlakaniphile esithinta ukusebenza kahle nokukhiqizwa kwemali yesikhungo samagesi ezinyathekazi. Noma ngabe ubeka phambili ukuthunyelwa ngokushesha kwamathangi e-GFS noma ubukhulu nobude bamathangi okhonkolo, okubalulekile ukufanisa izakhiwo zamathangi nezinto ezikwazi ukuxuba nokudala ukudla kwakho okukhethekile kanye nombuso wokushisa wokusebenza.
Ngabe njengamanje uhlola imininingwane yezinto ezisetshenziswa ethangini esikhungweni esisha sokuguqula udoti ube amandla, noma ngabe ufuna ukuxazulula izinkinga zokuxuba/zokubumba ethangini elikhona?
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