Maarg Manthan · Topic 14.1

Types of Solid Waste and Issues in Solid Waste Management in India

Environment & Ecology › Waste Management · Topic 14.1

Solid waste is any discarded solid or semi-solid material from human and animal activity. Its main types are municipal solid waste (household, market, street and commercial waste, about half of it organic in Indian cities), industrial waste, agricultural waste (crop residue, animal manure), construction and demolition waste, biomedical waste, electronic waste, hazardous waste and plastic waste. India generates well over 1.5 lakh tonnes of municipal solid waste a day, according to Central Pollution Control Board data, and the amount rises with population, urbanisation and consumption; check the latest CPCB figures. Key problems are poor segregation at source, open dumping and burning, overflowing landfills and legacy dumps such as Ghazipur, Bhalswa and Deonar, leachate that pollutes groundwater, methane emissions and landfill fires, shortage of land and funds, weak collection and transport in smaller towns, and the unrecognised role of waste pickers. The Swachh Bharat Mission - Urban 2.0 (2021) targets garbage-free cities and clearing of legacy waste dumps by 2026.

5 min read · UPSC Prelims · Environment & Ecology · Waste Management

At a Glance

Organic share About half of urban waste
Main problem Poor segregation
Famous dumps Ghazipur, Bhalswa, Deonar
Mission SBM-Urban 2.0
Main rules SWM Rules 2016
Exam link UPSC Prelims, Environment & Ecology: Waste Management

Where Does It Fit?

This is the first topic of the macro on waste management. It lists waste types and India’s difficulties before topics on practices, compost policy, the rules and special wastes. Previous topic: Mobile Tower Radiation and Electromagnetic Field (EMF) Concerns. Next topic: Waste Management Practices and Waste-to-Energy Technologies.

What Are the Types of Solid Waste?

Type	Features and sources
Municipal solid waste	Household, market, street, hotel and office waste; kitchen waste, paper, plastic, glass, metal and sweepings
Industrial waste	Process waste, slag, sludge, fly ash and chemical waste from factories
Agricultural waste	Crop residue, husks, manure and pesticide containers
Construction and demolition waste	Concrete, bricks, soil, metal and wood from building work
Biomedical waste	Infectious and sharp waste from hospitals and clinics
E-waste	Discarded electrical and electronic equipment
Hazardous waste	Toxic, corrosive, reactive or ignitable waste from industry and some households

What Are the Issues in India?

Poor segregation: wet, dry and hazardous waste are mixed, which spoils recycling and composting
Open dumping and burning: most waste still goes to dumps, with fires and smoke
Legacy waste: huge old dumps such as Ghazipur and Bhalswa in Delhi are overfull
Leachate and methane: liquid from dumps pollutes groundwater and gas causes fires and warming
Weak collection: smaller towns lack vehicles, transfer stations and treatment plants
Funding: low user fees and weak municipal finances
Informal sector: waste pickers recycle much waste but lack recognition and safety
Land shortage: cities struggle to find sites for processing plants and landfills

What Else Should You Remember?

CPCB data: annual reports give generation, collection, processing and landfilling by state
Per capita waste: urban India generates roughly 0.3 to 0.6 kg per person per day, lower than rich countries
Composition: about half is organic waste, with plastic, paper, glass and metal making up much of the rest
Wet waste: kitchen and food waste, suited to composting or biomethanation
Dry waste: paper, plastic, metal and glass, which can be recycled
Domestic hazardous waste: batteries, bulbs, paint, sanitary waste and chemicals
Sanitary landfill: an engineered site with liner, leachate and gas collection
Dumpsite: an uncontrolled disposal site without safeguards
Ghazipur: a Delhi dump that rose to a height of tens of metres and has seen fires and slides
Deonar: Mumbai’s old dumpsite, with repeated fires
Biomining and bioremediation: mining old waste to recover soil, plastics and fuel and clear the land
Indore model: source segregation, door-to-door collection and composting made Indore India’s cleanest city in repeated surveys
Swachh Survekshan: annual cleanliness ranking of cities
Waste picker numbers: lakhs of people work in informal recycling, and some cities now integrate them
Plastic waste: a large share of dry waste that is hard to collect and recycle
Construction waste: large volume that is mostly recyclable but often dumped
Waste hierarchy: reduce, reuse, recycle, recover, then dispose
Circular economy: designing out waste and keeping materials in use
NGT orders: the National Green Tribunal has ordered action on dumpsites and waste rules
SBM-Urban 2.0: launched in 2021 for five years, aiming at garbage-free cities
AMRUT: urban water and sewerage mission supports related services
Link to previous: see Mobile Tower Radiation and Electromagnetic Field (EMF) Concerns
Link to next: see Waste Management Practices and Waste-to-Energy Technologies
Link to rules: see Solid Waste Management (SWM) Rules, 2016
Caution: waste generation and processing figures change every year, so use the latest CPCB report
Exam hint: connect types of waste with their rules: SWM, e-waste, biomedical and hazardous
Source segregation: separating waste into wet, dry and domestic hazardous at home or business is the base for every later step
Door-to-door collection: regular household collection with separate compartments in vehicles prevents remixing
Waste to wealth: compost, biogas, recycled materials and energy can turn waste into revenue
Health of workers: sanitation workers and waste pickers face infection, injury and toxic exposure
Plastic and packaging: fast-growing packaging waste adds to litter and drains

Why Does It Matter for the Exam?

Organic share: About half
Problem: Segregation
Model city: Indore
Current affairs link: Legacy waste
Common errors: mixing sanitary landfill with dumpsite

As an analytical point, waste management fails first at the household, where mixed waste cannot be composted or recycled. Segregation, door-to-door collection and fair treatment of waste pickers are the base of every successful city system.

Why Is This Topic Important?

Root Mixed waste
Result Dumps, fires
Fix Segregate

What Came Next?

The next topic covers waste management practices and waste-to-energy technologies. Next topic: Waste Management Practices and Waste-to-Energy Technologies.

Key People and Terms

MSW Municipal solid waste
Leachate Dump liquid
Legacy waste Old dumped waste
C&D waste Construction debris
Biomining Mining old dumps
SBM Swachh Bharat Mission

Exam Corner

Points to Remember

Half of urban waste is organic.
Segregate into wet, dry, hazardous.
Landfill liquid: leachate.
Cleanest city model: Indore.
SBM-U 2.0 began 2021.

Do Not Confuse With

Dumpsite and sanitary landfill Uncontrolled versus engineered
Reduce and recycle Prevent versus reprocess
Wet and dry waste Compostable versus recyclable

Memory Hook

Mix it, dump it, burn it, leach it; segregate first.

Mains Angle

Questions ask for types and problems. These points help.

Types Many
Problems Mixing, dumps
Way Segregation

A Question You May Face

An original practice question, not a past paper question.

“Discuss the types of solid waste and the main challenges of solid waste management in India.”

How to Answer

Types List.
Problems Dumps.
Cases Ghazipur, Indore.
Way Segregate.

GS Relevance

Prelims: waste types, problems, missions. GS Paper 3: solid waste management.

Frequently Asked Questions

What are the main types of solid waste?

The main types are municipal solid waste from homes and markets, industrial waste, agricultural waste, construction and demolition waste, biomedical waste, electronic waste, hazardous waste and plastic waste. Each type has its own risks and, in India, its own set of rules for collection, treatment and disposal.

How much solid waste does India generate?

Central Pollution Control Board data show that India generates well over 1.5 lakh tonnes of municipal solid waste per day, and the amount is rising with urbanisation and consumption. A large part is organic. Only part of the waste is processed, while much still goes to dumpsites, so the latest annual CPCB report should be consulted for current figures.

What are the main problems in solid waste management in India?

Major problems include mixing of waste at source, open dumping and burning, overfull landfills and legacy dumps, leachate and methane, limited collection and treatment capacity in smaller towns, weak municipal finances, shortage of land for facilities and lack of recognition and safety for informal waste pickers.

What is leachate?

Leachate is the liquid that drains from solid waste in landfills and dumps as rainwater passes through it, carrying dissolved organic matter, heavy metals and other pollutants. If it is not collected and treated, it contaminates soil, groundwater and nearby water bodies, which is why sanitary landfills have liners and leachate collection systems.

What is the Indore model of waste management?

Indore in Madhya Pradesh became India's cleanest city in repeated national surveys by combining door-to-door collection with strict source segregation into wet and dry waste, composting and biomethanation plants for wet waste, community involvement, user charges and fines, and the integration of waste pickers into the formal system.

PYQ Practice — Statement Analysis

1 About half of urban solid waste in India is organic.

True

Suited to composting.

2 Leachate is gas released from landfills.

False

It is a liquid.

3 Indore is known for source segregation.