ParyavaranHiranyagarbha · Class 11-12
Composting, biogas aur landfill: teen raaste, teen trade-off
Geela kooda compost ban sakta hai, biogas ban sakta hai, ya landfill mein jaa sakta hai — teeno 'galna' hain. Phir inme farak kya hai, aur kab kaun sa behtar?
Socho pehle… phir dekho jawab
Farak oxygen aur niyantran ka hai: composting aerobic hai (khaad, CO₂, garmi); anaerobic digestion band tank mein hota hai aur methane ko biogas ke roop mein pakadta hai; bina niyantran ke landfill mein methane hawa mein nikal jaati hai.
Mechanism: aerobic composting mein oxygen ke saath jaivik padarth → CO₂ + paani + garmi + humus (khaad). Anaerobic digestion teen charan mein hota hai: padarth tootna (hydrolysis), acid banna, phir methanogenesis (methane banna). Gobar-gas plant isi par kaam karta hai.
Methane ek taakatwar greenhouse gas hai: ek tonne methane ek tonne CO₂ se zyada garmi rokta hai, khaaskar 20 saal ke daayre mein. Isliye landfill se bina niyantran ke methane nikalna ek jalvayu mudda hai, jabki biogas plant use eendhan ke roop mein pakad leta hai.
Policy: waste hierarchy (Reduce, Reuse, Recycle, phir recovery, aakhir mein landfill) aur Extended Producer Responsibility (EPR) — packaging banane wale ki zimmedari ki baat Plastic Waste Management Rules mein hai.
Trade-off: composting ke liye saaf, alag kiya hua geela kooda chahiye (plastic mila toh khaad kharab). Biogas plant mein poonji lagti hai aur saaf, nirantar kooda chahiye. Recycling kachche maal bachaati hai par uski bhi urja lagti hai aur mila-jula kooda ise rokta hai. Kooda jala kar urja banana aayatan ghatata hai par dhuen aur raakh ka mudda laata hai — is par bahas hai. Sabse behtar sabke upar Reduce hi hai.
Ghar pe try karo
Ghar ki teen cheezein chuno: sabzi ke chhilke, ek khaali bottle, ek multi-layer snack packet. Har ek ke liye likho: composting, biogas, recycling ya landfill mein se kaun sa raasta aur kyun. Packet ka kya hota hai? Bade ki madad se, khatarnak kooda mat chhuo.
Wow!
Bharat ke gaon ka gobar-gas plant ek chhoti anaerobic digestion machine hai!
3 sawaal
- Anaerobic digestion ka mukhya gaseous utpaad kya hai?
Jawab dekho
Methane (aur CO₂). Anaerobic digestion mein methanogenesis se methane aur CO₂ banti hain.
- Composting ke liye kaun sa input sabse zaroori hai?
Jawab dekho
Saaf, alag kiya hua geela kooda. Plastic ya doosra kooda mila ho toh khaad ki gunvatta girti hai.
- EPR ka matlab kya hai?
Jawab dekho
Packaging banane wale ki apne waste ki zimmedari. Extended Producer Responsibility mein producer apne packaging waste ki zimmedari leta hai.
NCERT se jodo: NCERT Class 12 Biology — environmental issues (solid waste management); microbes in human welfare (biogas)