Industrial Pollution – Chasing Tales

E waste – II: India

India is the world’s third-largest generator of e-waste, after China and the United States.¹ In 2019-20, India generated 1.01 million metric tonnes (MT) of e-waste.² By 2023-24, that figure had jumped to 1.751 million MT- a staggering 73% increase in just five years.³

To put this in context: we’re generating e-waste at a rate that’s nearly doubled in less than half a decade. 65 Indian cities generate more than 60% of India’s total e-waste.⁴ Ten states account for 70% of the national total.⁴ States like Uttar Pradesh, Haryana, Telangana, and Uttarakhand have each collected and processed over 400,000 tonnes between 2016-17 and 2023-24.⁵

In 2019-20, India recycled just 22% of its e-waste.³ By 2023-24, that figure had climbed to 43%.³ Formal collection capacity expanded significantly over this period — though these figures are contested, given documented issues with EPR certificate fraud.⁵ However, 57% of e-waste (equivalent to 990,000 MT) still goes untreated every year.³ CSE’s Siddharth Ghanshyam Singh has said, “The recycling rate for e-waste remains low due to the authorities’ inability to effectively engage the various stakeholders involved.”³

Over 90% of e-waste in India is handled by the informal sector—untrained workers in urban slums who use rudimentary, dangerous processes without protective equipment.⁶ These processes include:⁷

Open burning of cables to recover copper, releasing toxic fumes
Acid baths to extract precious metals, contaminating water and soil
Manual dismantling without safety gear, exposing workers to heavy metals
Heating circuit boards over open flames to melt solder

The workers,often including children, are directly exposed to lead, mercury, cadmium, brominated flame retardants, and other toxins.⁸ The health consequences are severe: respiratory problems, neurological damage, kidney damage, developmental issues in children, and various cancers.⁸ Pollutants leach into surrounding communities’ air, water, soil, and food.⁷ Studies show that e-waste workers experience far greater health impacts than nearby residents, but even bystanders suffer from the pollution.⁸

Yet this informal sector persists because there’s money in it.⁶ Scrap dealers offer cash for old electronics; formal collection infrastructure is limited; and public awareness of proper disposal methods is low.⁹ A 2022 study of consumers in semi-urban Tamil Nadu found that while 76% scored well on a general six-question e-waste awareness composite, only 40.5% were even familiar with the term ‘e-waste’ itself- and 79.4% were entirely unaware of the e-waste legislation and rules in India. The gap between general awareness and specific, actionable knowledge has real consequences.⁹

How do people actually dispose of e-waste? The study revealed:⁹

35% give their e-waste to scrap dealers (who often operate in the informal sector)
21% dispose of it with regular household waste
Smaller percentages engage in proper recycling or collection programs

Anecdotally, I have noticed a fourth behaviour, which is to store old devices at home for lack of a better option to dispose of them properly. I do use my old phone as an alarm clock these days. My mother uses hers as a reading device.

The reasons for this behavior are clear: lack of convenient collection points, insufficient awareness of formal systems, and the absence of economic incentives.¹¹ When people do dispose of electronics, they often choose the path of least resistance- the scrap dealer who comes to the door, or the trash bin.⁹

EPR
If e-waste is valuable, dangerous, and growing, the obvious question is why it’s still handled so poorly. The short answer is incentives.¹⁰ The long answer is that we’ve built systems that reward disposal, speed, and convenience, while making responsible recycling slow, confusing, or invisible.¹⁰

EPR is one of the most interesting environmental policies I’ve worked around, and is based on a simple principle: entities that place products on the market are made responsible for managing those products at end of life.¹¹ Electronics are considered well suited to EPR because producers are identifiable, products are traceable, and end-of-life impacts are significant.¹¹

Electronics contain hazardous materials that impose real public health and environmental costs when improperly handled.⁷ ⁸ At the same time, they contain valuable recoverable materials.¹¹ Without regulation, neither cost nor value is fully reflected in product pricing or business decisions. EPR attempts to internalise these externalities by shifting responsibility upstream- from municipalities and informal workers to producers.¹¹

In theory, a well‑designed EPR system for e‑waste should deliver several linked outcomes:¹²

Reduce unsafe disposal: By making producers responsible for collection and treatment, the policy aims to move waste out of dumps, open burning and backyard acid leaching, and into controlled facilities that meet environmental and occupational standards.
Increase recycling rates: Targets and obligations should push more material into authorised collection and recycling channels, improving national recycling performance relative to the global average.
Encourage better product design: When end‑of‑life costs show up on producers’ balance sheets, they have reasons to reduce hazardous substances, design for disassembly, and extend product lifetimes through durability and reparability.¹¹
Create stable financing: EPR fees, take‑back schemes, and producer responsibility organisations are meant to provide predictable funding for collection, transportation, recycling, and public awareness, instead of leaving municipalities and informal workers to absorb the costs.

On paper, this makes sense. In practice, it’s messy.

In India, producers meet EPR obligations largely through recycling certificates, essentially buying proof that someone, somewhere, recycled an equivalent amount of e-waste.¹³ This has improved formal recycling capacity, but it hasn’t meaningfully displaced the informal sector.¹⁴ Why? Because informal recyclers are faster, cheaper, and embedded in neighborhoods.⁶ They pay cash at the doorstep. Formal systems require awareness, transport, and effort.⁶

(You can also read about the economics of remanufacturing here)

India’s E-Waste Management Rules 2022 cover 106 different electrical and electronic equipment (EEE) products and their components. The 2022 rules recognise the following categories of stakeholders:¹⁵

Producers/Manufacturers: companies that make electronics for sale in India
Importers: those who bring electronics into India for sale
Bulk consumers: public institutions, offices, companies that generate large volumes of e-waste
Collection centers: authorized facilities for gathering e-waste from consumers
Recyclers: certified facilities that process e-waste using environmentally sound methods
Refurbishers: operations that repair and restore used electronics for resale

All these entities must register on a central portal developed by the Central Pollution Control Board (CPCB). Operating without registration is illegal.

Working smarter, not harder¹⁶
Kabadiwalas already operate the country’s most efficient reverse-logistics network. They have neighborhood-level reach, established trust, real-time pricing, and cash-based incentives that formal systems lack. Instead of trying to replace this network, policy should aim to formalize, standardize, and economically align it with safe recycling outcomes.

The core idea is simple: kabadiwalas should be treated as licensed collection and aggregation agents within the EPR framework. Producers would be mandated to route a fixed share of their collection targets through registered informal collectors. In return, kabadiwalas receive predictable payments for verified collection volumes—separate from the resale value of scrap—creating a financial incentive to hand material over to authorised recyclers rather than processing it themselves.

Today, informal workers earn more by dismantling, burning, or chemically processing electronics than by merely collecting them. Any incentive system that ignores this reality will fail. The solution is to decouple income from hazardous processing by paying for collection and safe transfer, not extraction.

This can be achieved through a per-kilogram collection fee, funded by EPR levies, paid directly to registered kabadiwalas once material is delivered to certified aggregation centers. Higher fees can be offered for high-risk items like lithium-ion batteries, CRTs, and circuit boards. Over time, this shifts the profit center upstream—from toxic backyard processing to safe logistics—without destroying livelihoods.

Importantly, traceability should flow forward, not backward. Once e-waste enters a certified channel, downstream recyclers and producers carry responsibility for compliance. Kabadiwalas should not be punished for system failures beyond their control; they should be paid for verified inputs.

Also: incentives alone are not enough. Mandates must close the loopholes that currently allow producers to meet EPR obligations on paper while real waste leaks into informal streams.

Regulations should require that:

A minimum percentage of e-waste collection occurs via registered decentralized collectors
Producers demonstrate geographic coverage, not just aggregate tonnage
Producers fund training, safety gear, and transition support for informal collectors they rely on

This forces formal systems to go where the waste actually is: homes, offices, and small businesses—not just bulk institutional sources.

This approach aligns incentives across the system:

Kabadiwalas earn stable, safer income
Producers meet real, verifiable EPR targets
Formal recyclers get cleaner, higher-quality feedstock
Cities and regulators reduce environmental and health damage without heavy enforcement

Most importantly, it acknowledges a basic truth: India does not lack recycling capacity—it lacks institutional pathways that convert existing economic behavior into safe outcomes. India’s e-waste crisis is not a failure of technology. It is a failure of incentives. Until policy rewards safe behavior as effectively as the informal market rewards unsafe extraction, the system will continue to leak toxicity.

The best part? Formal-informal partnership pilots in Delhi, Bangalore, and Pune, documented by GIZ in 2017, established that integration is operationally feasible. The document also reveals why this setup keeps failing: without mandatory EPR-linked financial flows from producers, these partnerships depend on goodwill and donor funding, and collapse once the initial support ends. The lesson isn’t that the model doesn’t work. It’s that it can’t be left to voluntary agreements.¹⁶

I worked on an e-waste project in 2013, and then on another one around 2018. The conversations hadn’t changed. The problems hadn’t changed. Even the language hadn’t changed. Everyone knew what wasn’t working — but the problems persisted. Incorporating the informal sector into the formal setup is one of the most inclusive and forward-looking steps the government can take, and it’s beyond time this was taken care of.

Sources

Emissions control technologies

What is Pollution?
“Pollution” is anything harmful or unwanted that has been added to the environment. Pollution makes the environment unsafe or unhealthy for living beings. It can take many forms: smog in the air, polluted rivers, plastic waste on beaches, excessive noise, or too much light that doesn’t allow us to see the night sky unhindered. Interestingly, pollution need not only be anthropogenic¹, although it usually is- examples of naturally originated pollution are ash from volcanic eruptions¹ ² exploding into the air around it, wildfires¹ ³ ignited by lightning causing smoke, ash, and burnt soil (in fact, air pollution can help wildfires create their own lightning and rain!!), dust storms⁴, sea spray (salt aerosols)⁵, pollen from plants⁶, radioactive gases from the earth like radon⁷, or even just the natural decay of organic matter⁸. A substance is categorised as a pollutant not by its origin, but by its effect- if it overwhelms nature’s ability to process or neutralise it, it is a pollutant.

Industrial vs. Natural Pollution
Industrial pollution comes from factories, power plants, and other places that make goods or energy. When these places take in raw materials (like oil, coal, metal, or chemicals) and turn them into products, the act of converting one product into another creates waste or toxins which are often released untreated into the environment in quantities the planet cannot naturally digest, and thus are left to infiltrate the natural world instead.

The planet has ways to cleanse itself—think forests soaking up CO₂⁹, wetlands filtering water¹⁰ ¹¹, or microbes breaking down organic matter¹²¹³. But when industries release more pollutants than the ecosystems can handle, several things happen¹⁴:

Bioaccumulation: Heavy metals and persistent toxins build up in soils, water, and living organisms, threatening animals and humans over time.¹⁴
Eutrophication: Nutrient pollution (nitrogen, phosphorus) from factories causes massive algae blooms in water, choking aquatic life.¹⁵
Smog and Acid Rain: Sulfur and nitrogen emissions react in the atmosphere, causing acid rain that harms forests and water bodies, and smog that damages lungs.¹⁶
Climate Change: Industrial greenhouse gases overload natural carbon sinks—heating the planet faster than forests or oceans can reabsorb emissions.¹⁷ ¹⁸ ¹⁹ ²⁰

Industrial pollution is quite different from pollution of a natural origin. For one, it’s caused directly by human activity, which means it often contains complex mixtures of artificial chemicals, persistent organic pollutants (POPs)²¹, heavy metals²³, synthetic compounds²², and engineered nanoparticles²². Many of these substances do not exist in significant quantities naturally and can remain toxic or disruptive for decades or centuries.¹⁸²⁴ Industrial pollution tends to be constant, widespread, and cumulative, with sustained emissions over years or decades (e.g., daily smokestack releases, persistent wastewater discharge), building up in our air, water, and soil to levels far beyond our home’s natural processing capacity, all of which creates long- term, regional, and global problems (e.g., acid rain, climate change, ocean acidification).¹⁸²⁴ Industrial pollutants are novel and often have no natural analogs, and can result in chronic overexposure for living systems.²²

In contrast, natural pollution, while hazardous, is typically more easily integrated or remediated by environmental processes, is episodic in nature, is naturally occurring and thus can be eventually reabsorbed by the Earth that produced it.²⁵¹

Treatment Technologies
There are a number of methods used to treat industrial pollution. Here’s a brief rundown:

1. Particulate Matter Control Technologies
Electrostatic Precipitators (ESPs)²⁶

How They Work: ESPs use strong electrical fields to “charge” tiny dust particles in factory exhaust. The charged particles are then attracted to plates with the opposite charge, sticking to them and leaving the air much cleaner.
Effectiveness: ESPs can remove up to 99.9% of dust and fine particulates—making them a powerhouse for cleaning industrial air, especially in power plants, steel mills, cement factories, and chemical works.
Variants: Dry ESPs: plates are shaken mechanically to dislodge and collect dust, Wet ESPs: Plates are sprayed with water, which continuously washes away dust.

Fabric Filters and Baghouses²⁷

How They Work: Picture a giant vacuum cleaner with hundreds of long, sturdy bags acting as filters. Dirty air passes through these bags; dust sticks to the fabric and forms a “dust cake.” It’s actually this cake that does most of the filtering.
Effectiveness: Baghouses trap over 99% of dust and even extremely tiny particles, outperforming most other dust controls for submicron pollution.
Cleaning Methods: Shaker: Bags are gently shaken to dislodge dust, Reverse Air: Air is blown backwards to release the dust, Pulse-Jet: Bursts of compressed air blast dust off the bags.²⁸

2. Gaseous Pollutant Control Technologies

Wet Scrubbing Systems²⁹

How They Work: Exhaust gases are washed or “scrubbed” with water or chemicals. Harmful gases dissolve in the scrubbing liquid or react to form “captured” compounds, which can then be removed.
Uses: These systems remove acid gases like sulfur dioxide, nitrogen oxides, and hazardous vapors in industries ranging from chemical plants to steel works.
Configurations: Venturi Scrubbers accelerate dirty air and spray it through water at high speed to trap both gas pollution and dust, Packed Bed Scrubbers pass polluted gas through a tower packed with materials (plastic, ceramic) to maximize contact with the scrubbing fluid, Spray Towers: Sprinklers ensure the widest possible liquid-air contact.
Benefits: Not only do wet scrubbers clear harmful gases from air, but they can also remove dust, cool hot gases, and help prevent fires.

Selective Catalytic Reduction (SCR)³⁰³¹

How They Work: SCR is the gold standard for cleaning nitrogen oxides (NOx) from exhaust. It injects ammonia or urea into hot industrial gases, which then react on a special catalyst to turn NOx into harmless nitrogen and water vapor.
Effectiveness: Can cut NOx pollution by 70-95%, which is crucial for power plants, ships, and large boilers.
Key Features: Requires careful temperature control (typically 180°C to 450°C) for best results, uses advanced catalyst materials (like titanium, vanadium, tungsten) for durability and performance in tough conditions.

Technologies for Volatile Organic Compound (VOC) Destruction
Thermal Oxidation Systems
How They Work: VOCs (volatile organic compounds) and other hazardous pollutants are destroyed by burning them at very high temperatures (around 1400–1600°F). The process breaks down harmful chemicals into carbon dioxide and water vapor.³²

Direct-fired oxidizers: Simple units that rely purely on heat.³³ ³⁴

Recuperative oxidizers: Use heat exchangers to recover energy for improved efficiency.
Effectiveness: When properly run, these systems can destroy over 99% of the target pollutants.
Safety & Control: Advanced thermal oxidizers continuously monitor temperature and emissions, shutting down automatically if anything goes wrong.

Regenerative Thermal Oxidizers (RTOs)³⁵

How They Work: RTOs take thermal oxidation a step further—they use beds of special ceramic material to trap and reuse heat, slashing energy costs.
Process: Air is directed through different sets of ceramic beds that absorb heat from outgoing clean air and transfer it to incoming dirty air, minimizing additional fuel requirements.
Effectiveness: Modern RTOs achieve up to 97% thermal efficiency and can sometimes run “fuel-free” if incoming air is rich enough in VOCs.

There are now also biological ways to treat the menace:

Biofilters: Air is pushed through beds filled with soil, straw, wood chips, or compost. Microbes living in the filter “eat” bad chemicals and smells (like VOCs—volatile organic compounds—from paint factories, food plants, or sewage treatments). The result is clean air and harmless byproducts.³⁶
Biotrickling Filters: Polluted air moves through towers packed with plastic or rock, sprayed with nutrient-rich water. Microbes grow on these surfaces. As the air flows, microbes capture and sponge up pollutants.³⁷ ³⁸
Bioscrubbers: Air is washed in tanks containing water and bacteria. Pollutants dissolve in the water, and the microbes digest them over time.³⁶
Industrial Wastewater Treatment with Microbes: Factories often create dirty water full of chemicals, oils, or heavy metals. Specialized treatment tanks use bacteria to eat these contaminants. Through activated sludge processes, millions of microbes clean water effectively before it’s released back to rivers or reused.³⁶

Industries often use layered strategies: A scrubber might remove much of the pollution, but a biofilter finishes the job, catching what remains.

Sources

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