'Composting' of organic MSW is a process of:
Choose the correct answer
Incineration of waste at 800°C
Controlled aerobic decomposition of organic matter by microbes — produces stabilised compost at thermophilic temperatures
Anaerobic digestion to produce biogas
Chemical treatment with acids
Correct Answer
B. Controlled aerobic decomposition of organic matter by microbes — produces stabilised compost at thermophilic temperatures
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Composting: controlled aerobic bio-oxidation of organic matter by microorganisms → stabilised humus (compost). Temperature rises to 55–70°C (thermophilic phase kills pathogens). Products: CO2, water, heat, stabilised organic matter. C:N ratio input: 25–30:1 (optimal). Final compost C:N ≈ 10:1. Types: windrow (open), aerated static pile, in-vessel (fastest, odour-controlled). Used as soil amendment.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Practice more Civil Engineering questions
This MCQ belongs to JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.