Rajshree Group provides complete Sludge Management Systems for paper mill ETPs covering sludge thickening, dewatering, drying, and disposal. Proper sludge management is essential for minimising ETP operating costs and meeting hazardous waste regulations.
Product Overview
Our systems reduce sludge volume by up to 90%, making disposal safe and economical.
Key Features
- ✓Gravity thickener for primary sludge
- ✓Dissolved air flotation (DAF) thickener
- ✓Polymer conditioning and dosing system
- ✓Belt filter press for dewatering
- ✓Centrifuge for bio-sludge dewatering
- ✓Screw press as alternative dewatering
- ✓Sludge dryer (rotary or belt type)
- ✓Sludge storage bin and truck loading
Applications
- Primary sludge from ETP clarifiers
- Biological sludge from aeration tanks
- Mixed sludge management
- Sludge co-processing in cement kilns
- Biogas generation from sludge
Our Turnkey Project Process
We understand your requirements, site conditions, and budget to prepare a detailed feasibility report.
Complete process design, P&IDs, civil layout, electrical single lines, and equipment specifications.
In-house and vendor-sourced equipment manufactured, quality-inspected, and dispatched on schedule.
Our engineers supervise erection, electrical, instrumentation, and commission the plant to design parameters.
Hands-on operator training, performance guarantee trial, and ongoing technical support for the life of the plant.
Get a Free Quote
Tell us your capacity requirement and we'll send a detailed technical and commercial proposal within 48 hours.
Request a Quote →Contact Our Experts
📍 Branch Office: 1913 Gunbarrel Road, Suite 105 Chattanooga, TN 37421, USA |
📍 Branch Office: D7, Varsity Chateau, Uniport Road Aluu, Port Harcourt, Rivers State, Nigeria |
Why Choose Rajshree?
- ✅ 20+ years industry experience
- ✅ 22+ successful projects delivered
- ✅ Serving India, Africa & Middle East
- ✅ Complete turnkey — single point responsibility
- ✅ After-sales support and spare parts
- ✅ Competitive pricing and financing options
Sludge Management in Paper Mills: From Wastewater Treatment to Value Recovery
A paper mill's effluent treatment plant generates two main sludge streams: primary sludge (fibre-rich solids from the primary clarifier) and biological sludge (microbial biomass from the secondary aeration tank). Together, these streams can represent 30–80 kg of dry solids per tonne of paper produced — a significant solid waste management challenge if not handled systematically. Rajshree Group's sludge management systems transform this challenge into an opportunity: recovering fibre, generating energy, or producing soil amendment materials.
Primary sludge from paper mill ETPs typically contains 30–50% cellulose fibres — too fine to recycle to the paper machine without quality impact, but an excellent fuel for the bark and biomass boiler. Rajshree designs primary sludge thickeners, belt filter presses, and conveying systems to dewater primary sludge to 30–40% dry solids, then feed it to the boiler as supplementary fuel. This energy recovery can contribute 5–10% of total mill steam demand.
Biological sludge is more difficult to dewater (due to its gel-like microbial structure) and requires polymer conditioning before pressing. Rajshree supplies complete biological sludge handling systems — gravity thickeners, polymer dosing stations, belt filter presses or centrifuges, and sludge conveying to disposal or co-composting facilities. For mills pursuing sustainability certification, Rajshree can design sludge composting systems that convert mixed sludge into marketable soil conditioner.
Rajshree's most advanced sludge management designs achieve near-zero landfill disposal: primary sludge to boiler fuel, biological sludge to composting, and ash from sludge combustion to cement industry as pozzolanic additive. This circular approach not only reduces waste disposal costs but supports ESG reporting and sustainability certification for export market access.
Frequently Asked Questions
Countries We Serve
Rajshree Group supplies and installs our Sludge Management System — and complete pulp & paper mill machinery — for mills across India, Africa and the Middle East, with sea-freight delivery, on-site erection, commissioning and after-sales support in every market we serve.