Implementation of Sludge Removal and Cleaning of Treatment Tanks at Hitt Station – Riyadh
Project Description
A specialized project for sludge removal and cleaning of primary treatment tanks inside Hitt Station. The objective was to improve operational efficiency and prevent accumulated deposits from affecting station performance.
Client
National Water Company (NWC)
Service Provided
Sludge Tank Cleaning and Sediment Removal
Project Status
Successfully Completed
Before Work
After Work
Objectives & Challenges
/ Project Overview
This project is considered one of the important operational projects that contribute to improving the efficiency of wastewater treatment systems. The work included cleaning primary treatment tanks inside Hitt Station, where these tanks play a key role in separating solids before biological treatment stages.
The project aimed to remove accumulated deposits that affect operational efficiency and raise tank readiness to ensure the continuity of operational processes inside the station without obstacles.
Scope of Work
The scope of work in this project included:
- Removing accumulated sludge inside primary treatment tanks
- Complete cleaning of tanks from sludge and sediment
- Extracting solid waste using specialized equipment
- Cleaning tank surfaces and side walls
- Rehabilitating tanks to improve operational efficiency
- Executing works without affecting station continuity
/ Project Challenges
The project faced a number of important operational challenges, most notably:
- Working inside enclosed tanks (Confined Spaces)
- Handling large quantities of sludge over a long period
- Sensitive operational environment requiring high precision
- Carrying out works without affecting the Permit to Work system
- Possibility of hazardous gases inside tanks
Project Execution and Treatment Methodology
The project was implemented according to a precise operational methodology to achieve the highest levels of quality and efficiency, which included:
- Conducting a comprehensive field inspection and risk assessment
- Preparing an integrated work plan suitable for site conditions
- Preparing and securing the site according to safety requirements
- Carrying out extraction and cleaning works using specialized equipment
- Applying the Permit to Work (PTW) system during all execution stages
- Continuous follow-up to ensure work quality and required results
Safety and Risk Management
The project was carried out according to the highest professional safety standards, including:
- Applying the Confined Space Entry system
- Use of Personal Protective Equipment (PPE)
- Continuous monitoring of gases inside tanks
- Providing suitable ventilation systems
- Preparing a complete emergency response plan
- Full compliance with the Permit to Work system