Sieving, sedimentation, decantation aur filtration kya hain?

Sieving

Meethi puri ke liye aata goondhne se pehle Valli ki Mami use chhaanti hain. Baarik aata chhalni ke chhedon se nikal jaata hai, aur bade kan, jaise chokar aur chhote kankad, upar reh jaate hain. Ye sieving hai.

Sieving tab use hoti hai jab solid–solid mixture ke hisse alag size ke hon. Ye tabhi kaam karti hai jab chhed ek hisse se bade aur doosre se chhote hon: agar chhed sabse bade hon, to sab kuch gir jaayega. Construction sites pe bhi chhalni se ret se kankad aur pathar alag kiye jaate hain.

Sedimentation aur decantation

Puducherry mein Dada bachchon ko bina chhalni ke chai se patti hataana dikhaate hain. Wo chai ke bartan ko thodi der bina hilaaye chhod dete hain, aur pattiyan neeche baith jaati hain. Phir bartan jhuka ke chai dheere se cup mein daalte hain.

• Liquid mein bhaari, na ghulne wale hisse ka neeche baithna sedimentation hai.
• Bartan jhuka ke liquid nikaalna decantation hai.

Decantation chawal aur daal dhone mein bhi use hota hai, aur tel aur paani alag karne mein, jo milte nahi: tel upar parat banata hai aur nikaala ja sakta hai. Par decantation poora nahi hota, isliye kuch pattiyan cup tak aa hi jaati hain.

Filtration

Chai ki chhalni se saari pattiyan ruk jaati hain. Is tarah pattiyan chai se alag karna filtration hai. Chhalni ke chhed kaafi bade hote hain, isliye ye gande paani ko saaf nahi kar sakti. Kapde ke dhaagon ke beech bahut chhote chhed hote hain aur ye behtar kaam karta hai; log purane zamaane se kapde ko aise use karte aaye hain. Jo paani phir bhi ganda rahe, uske liye bahut baarik chhedon wala filter paper use hota hai.

Laboratory mein gande paani ko filter karne ke liye filter paper ko mod ke cone banao, use conical flask pe rakhe funnel mein rakho, aur ganda paani daalo. Keechad paper pe residue ban ke rukta hai, aur saaf paani flask mein filtrate ban ke ikattha hota hai.

Cotton, charcoal aur ret jaise padarth bhi filter ka kaam karte hain. Chunaav is pe depend karta hai ki hataane wale kan kitne bade hain: filter ke chhedon ka size hi asli baat hai. Tea bags ki kahani bhi yahi dikhati hai: pehle wo silk ke bante the, phir gauze ya malmal ke, aur aaj zyadatar filter paper ke.

Hamare aas-paas filtration

• Machhli ka jaal apne jaal ke chhedon se paani nikal jaane deta hai aur machhliyan rok leta hai, kuch-kuch filter jaisa.
• Hamari naak ke baal saans ki hawa se dhool rok lete hain.
• Mask chhoti boondon aur dhool ko aage nahi jaane deta.

Ye tareeke kya nahi kar sakte

Sieving, sedimentation, decantation aur filtration un hisson ko alag karte hain jo nahi ghulte. Paani mein ghula namak kisi bhi filter se seedha nikal jaata hai. Use wapas paane ke liye paani ko evaporation se hataana padta hai. Aur filter karke saaf dikhne wale paani mein bhi germs ho sakte hain, isliye talab ka paani peene se pehle ubaalna bhi chahiye.

Tareeka chunna

Mixture	Tareeka	Kyun
Aate mein chokar, ret mein kankad	Sieving	Kanon ka size alag
Chai mein patti, tel aur paani	Sedimentation aur decantation	Bhaari hissa baithta hai, ya liquids ki parat banti hai
Paani mein keechad, paani mein chalk powder	Filtration	Na ghulne wala solid filter pe rukta hai

Anaaj chhalni tak pahunchne se pehle threshing aur winnowing se guzarta hai.