Abin da ya kamata ka kula da lokacin amfani daBOD analyzer:
1. Shiri kafin gwaji
1. Kunna wutar lantarki na incubator biochemical sa'o'i 8 kafin gwajin, kuma sarrafa zafin jiki don aiki akai-akai a 20 ° C.
2. Sanya ruwan dilution na gwaji, ruwan inoculation da ruwan dilution na inoculation a cikin incubator kuma a ajiye su a cikin zafin jiki akai-akai don amfani daga baya.
2. Ruwa samfurin pretreatment
1. Lokacin da ƙimar pH na samfurin ruwa ba tsakanin 6.5 da 7.5 ba;da farko za a gudanar da gwajin daban don sanin ƙimar da ake buƙata na hydrochloric acid (5.10) ko maganin sodium hydroxide (5.9), sannan a kawar da samfurin, ko da kuwa akwai hazo.Lokacin da acidity ko alkalinity na samfurin ruwa ya yi girma sosai, za'a iya amfani da alkali mai mahimmanci ko acid don daidaitawa, tabbatar da cewa adadin bai kasa da 0.5% na girman samfurin ruwa ba.
2. Don samfuran ruwa masu ɗauke da ƙaramin adadin chlorine kyauta, chlorine ɗin kyauta gabaɗaya zai ɓace bayan an bar shi na awanni 1-2.Don samfuran ruwa inda chlorine kyauta ba zai iya ɓacewa cikin ɗan gajeren lokaci ba, ana iya ƙara adadin da ya dace na maganin sodium sulfite don cire chlorine kyauta.
3. Samfurori na ruwa da aka tattara daga jikunan ruwa tare da ƙananan yanayin ruwa ko tafkunan eutrophic yakamata a yi saurin zafi zuwa kusan 20 ° C don fitar da narkar da iskar oxygen a cikin samfuran ruwa.In ba haka ba, sakamakon bincike zai zama ƙasa.
Lokacin ɗaukar samfurori daga jikin ruwa tare da yanayin zafi mafi girma ko wuraren zubar da ruwa, ya kamata a kwantar da su da sauri zuwa kimanin 20 ° C, in ba haka ba sakamakon bincike zai yi girma.
4. Idan samfurin ruwan da za a gwada ba shi da ƙananan ƙwayoyin cuta ko rashin isasshen aiki, dole ne a yi amfani da samfurin.Kamar nau'ikan ruwan sharar masana'antu kamar haka:
a.Ruwan sharar masana'antu wanda ba a yi masa magani da sinadarai ba;
b.Yawan zafin jiki da matsanancin matsin lamba ko haifuwar ruwa, ya kamata a ba da kulawa ta musamman ga ruwan sha daga masana'antar sarrafa abinci da najasar gida daga asibitoci;
c.Ƙarfin acidic da ruwan sharar masana'antu na alkaline;
d.Ruwan sharar masana'antu tare da ƙimar BOD5 mai girma;
e.Ruwan sharar masana'antu mai dauke da abubuwa masu guba kamar jan karfe, zinc, gubar, arsenic, cadmium, chromium, cyanide, da sauransu.
Ruwan dattin masana'antu na sama yana buƙatar kulawa da isassun ƙwayoyin cuta.Tushen kwayoyin halitta sune kamar haka:
(1) Maɗaukakin najasa na gida wanda ba a kula da shi ba wanda aka sanya shi a 20 ° C na awanni 24 zuwa 36;
(2) Ruwan da aka samu ta hanyar tace samfurin ta takarda tace bayan an gama gwajin da ya gabata.Ana iya adana wannan ruwa a 20 ℃ na wata daya;
(3) Tuba daga masana'antar sarrafa najasa;
(4) Ruwan kogi ko tafki mai ɗauke da najasa a cikin birni;
(5) Nau'in kwayoyin cuta da aka samar da kayan aiki.A auna 0.2g na nau'in kwayoyin cuta, a zuba a cikin 100ml na ruwa mai tsabta, a ci gaba da motsawa har sai ƙullun sun tarwatsa, sanya shi a cikin incubator a 20 ° C a bar shi ya tsaya na 24-48 hours, sa'an nan kuma ɗora supernatant.
Lokacin aikawa: Janairu-24-2024
