CHAKR Marjak

India's First Pneumatic Assisted Sludge Evacuation Machine
Certified by IIT Delhi and Nation Physics

Indigenously developed Sludge Evacuation Machine for Indian Railways’ bio-digester chambers, engineered through detailed Root Cause Analysis (RCA) to ensure uninterrupted sludge removal.

Smarter Biodigester Cleaning Without Disrupting Bacterial Colonies

चक्र मार्जक™ is an indigenously developed pneumatic-assisted, vacuum-based solid–liquid evacuation system designed for the efficient removal of heterogeneous, non-biodegradable waste from bio-digester reservoirs in Indian Railways rolling stock.

Developed through extensive Root Cause Analysis (RCA) of conventional Bio Tank Evacuation Machine limitations, Chakr Marjak uses advanced pneumatic-assisted technology to deliver clog-free operation, zero dependency on external power supply, and effective sludge evacuation while preserving the microbial ecosystem required for efficient waste decomposition.

Built for sustainable railway sanitation, Chakr Marjak features a lightweight, modular, and user-friendly design that reduces maintenance time, operational risks, and manual effort. It enables faster, safer, and environmentally responsible bio-digester maintenance, supporting reliable and modern railway sanitation operations.

SMARTER CLEANER, LESS EFFORT

Chakr Marjak delivers a smarter approach to bio-digester maintenance with no external power requirement, zero direct human contact with sludge, and safe, hygienic cleaning. Its innovative design reduces operational downtime while ensuring sustainable and efficient sludge evacuation.

Smart Cleaning. Safe Biology.

Chakr Marjak follows a simple three-stage process to ensure safe, efficient, and sustainable bio-digester maintenance

Extract

Pneumatic vacuum technology safely evacuates sludge, plastics, fibrous waste, and other blockages from the bio-digester chamber without manual handling.

Separate

A perforated sheet filtration system separates Non Biodegradable solid waste from the liquidBio degradable fraction, ensuring effective sludge removal while preventing clogging.

Recirculate

The filtered liquid is recirculated back into the bio-digester, preserving beneficial microbial activity and maintaining efficient waste decomposition.

why Chakr Marjak is the only complete solution

Chakr Marjak outperforms conventional bio-tank evacuation machine (BEM) with a lighter, power-free design that eliminates choking, reduces maintenance, and improves operational reliability.

Parameter	BEM	Chakr Marjak
Weight	High	Low
Residue Compartment	Low	High
Compatibility with Media	Chokes / seizes with clothes, fabrics, plastics, large solids, diapers, foil packets etc.	No choking or seizure. Handles all suspended waste materials along with sewage media.
Moving Parts in Suction Line	Lobes, Motor	Nil
Diagnosis	Cumbersome and expensive. Involves mechanical and/or electrical intervention.	Easy and inexpensive. Involves only mechanical intervention. Operates on compresses air
Traceability	None	Smart Monitoring
Failure Frequency	High	Very Low
External Electrical Power	3 ph AC – 1.5 kW	0 W
Inoculum in Discharge	Retained with some losses	Enriched during discharge

Frequently Asked Questions

What is a pneumatic-assisted sludge evacuation machine?

A pneumatic-assisted sludge evacuation machine uses compressed air to create powerful suction for removing and discharging thick sludge and solid-heavy waste. Chakr Marjak is designed to make this process faster, safer and more efficient, especially in demanding cleaning environments.

What types of waste can Chakr Marjak handle?

Chakr Marjak can handle thick faecal sludge, mud, industrial slurry, stones, plastic, cloth and other debris. It is designed to manage waste containing up to 80% solids

Does Chakr Marjak clog like traditional pumps?

No. Unlike conventional pumps, Chakr Marjak has no rotating impellers or internal blades in the waste flow path. This clog-free design allows it to handle solid-heavy sludge and debris without frequent interruptions.

Does Chakr Marjak require electricity

No. Chakr Marjak runs entirely on compressed air, so it does not require an electrical-grid connection or battery hookup. This makes it suitable for locations where electricity is unavailable or unsafe to use.

Where is Chakr Marjak primarily used?

Chakr Marjak is suitable for Indian Railways coaching depots, municipal septic-tank cleaning operations, chemical-plant sumps and other locations where thick, difficult-to-pump sludge must be removed.

Why is Chakr Marjak preferred for railway bio-toilets?

Railway bio-toilets often contain plastic, cloth and other debris discarded by passengers. Chakr Marjak can quickly evacuate sludge from the first chamber without getting clogged by these materials, helping maintenance teams complete cleaning more efficiently.

Are a pneumatic-assisted sludge evacuation machine and a sludge dewatering machine the same?

No. They are completely different machines used at separate stages of sludge management. Chakr Marjak Pneumatic-Assisted Sludge Evacuation Machine: This is a collection and evacuation system. It uses compressed air to suction and discharge wet, thick and solid-heavy sludge from tanks without clogging. Sludge Dewatering Machine: This is a sludge-processing system. It uses mechanical pressure, such as a screw press or belt press, to separate water from wet sludge and convert it into a drier solid cake.