ADSD Consulting Private Limited
Sulfur Coated Urea
Advanced Coating Technology for
Controlled Release Fertilizer
Sulphur-Coated Urea (SCU) is a slow-release nitrogen fertilizer designed to improve nitrogen use efficiency, enhance crop productivity and support sustainable agriculture.
TECHNOLOGY & PROCESS DETAILS
Continuous SCU Plant — Raw Materials, Product and Utilities Details
Raw Materials
| Material | Specification |
|---|---|
| Urea | 99% · 1.0–2.4 mm · H₂O 0.3% max. |
| Sulphur | 99.93% min. purity |
| Sealant | Proprietary items |
| Conditioner | Proprietary items |
Product & Performance
37%
Nitrogen (min., dry)
17%
Sulphur coating
< 1%
Process wastage
17.5–35%
7-day dissolution
Utilities Per Ton SCU
| Utility | Requirement |
|---|---|
| Steam | 7 bar · 0.180 T |
| Electricity | 9.8 kWh (420/220/110 V) |
| Water | 2 bar, 21 °C, Filtered |
| Air | 8 bar · −30 °C dew point |
TECHNOLOGY & PROCESS DETAILS
Nitrogen Release Profile and Factors Affecting Release
Factors Affecting SCU Release
Conventional urea SCU (continuous SCU plant)
Illustrative curve (ADSD). Actual curve to be established by 7-day dissolution test (TVA method) on pilot samples; typical 7-day dissolution 17.5–35%.
Type of Substrate
Granule/Prills Quality sets the Coating needed
Sulphur Quality
99.93% min. purity
Coating thickness
More coating → Slower Release
Sealant Type & Amount
Seals Cracks and Pores in the Shell
Conditioning Agent
Free-flow; Protects the Coating
Process Temperature
Pre-heat, Spray and Cooling Control
TECHNOLOGY & PROCESS DETAILS
SCU Soil Release & Charging Cycle Overview
Sulphur-Coated Urea (SCU), also introduced as Urea Gold in India, is a slowrelease (controlled-release) nitrogen fertilizer
Because the sulphur shell slows down the breakdown of urea, nitrogen is released gradually over a period of 40 to 90 days in the soil as soil microbes break down the sulphur layer and water penetrates the granule.
Due to this slow-release mechanism, the application cycle (gaps between applications) for SCU is longer than standard urea, and fewer splits are required.
| Stage | What Happens in the Soil | Timeline |
|---|---|---|
| Initial Phase | Water enters microscopic pores in the sulphur shell. Initial dissolution begins. | 0 to 7 days |
| Peak Release | Soil bacteria oxidize sulphur; nitrogen release peaks to match early active vegetative growth. | 15 to 45 days |
| Extended Release | Remaining nitrogen slowly leaks out, supplying nutrients through early reproductive stages. | 45 to 90 days |
About Us
ADSD Consulting Private Limited
ADSD Adsorbents & Specialities
Private Limited
Delivering integrated Engineering, EPC, Consulting, Chemicals & Supply Chain and Activated Carbon solutions to Industries Worldwide.
Engineering & EPC
Chemicals & Supply Chain
Contact Us
- info@adsd.in
- +91 9958582437
-
Anthurium Office Space, 1103-1105, Sector-73, Noida,
Pin 201307, NCR Delhi, India
Download Brochure
About
ADSD Group, headquartered in Noida/Delhi (NCR), India, ADSD Group began its journey in 2017 with the establishment of its flagship company ADSD Consulting Pvt. Ltd.
Engineering & EPC
Supply Chain
Activated Carbon Business
Quick Link
Contact Us
- info@adsd.in
- +91 96506 93468
-
Anthurium Office Space, 1103-1105, Sector-73, Noida,
Pin 201307, NCR Delhi, India
Download Brocher
Copyright © 2026 All rights reserved. Powered by ADSD Group