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Pretreatment Unit Design Services for Sewage Treatment Plants (STPs)

Optimized Solutions for Efficient Removal of Floating Garbage, Grit, and Oil

At Fundametal Technologies, we specialize in advanced pretreatment unit (PTU) design services for sewage treatment plants (STPs) to ensure smooth operation, maximum capacity utilization, and minimal maintenance. Our precision-engineered designs optimize influent screening, grit removal, and oil separation while preventing sedimentation, turbulence, and hydraulic imbalances.

Why Effective Pretreatment Matters

Raw sewage contains floating debris, grit, and oil, which, if not efficiently removed, can clog equipment, increase wear, and disrupt downstream treatment processes. Our cutting-edge designs help:

  • Maximize screening efficiency – Prevent blockages and improve debris capture.

  • Enhance hydraulic performance – Eliminate turbulence and optimize flow conditions.

  • Prevent PTU Overflow & Capacity Loss – Ensure uninterrupted flow into the STP.

  • Extend equipment lifespan – Minimize wear on downstream processes.

Advanced Calculation Methods for Unmatched Precision

We employ state-of-the-art engineering techniques to ensure the highest efficiency in pretreatment unit design:

Assumption-Free Iterated Linear Flow Calculations – Our proprietary approach ensures that screens, gates, and channels are sized for optimal velocity control, eliminating turbulence and preventing debris carryover.

CFD Simulation Verification – We validate our designs through Computational Fluid Dynamics (CFD) to ensure:

  • Accurate hydraulic flow modeling

  • Optimized screen efficiency under variable flow conditions

  • Elimination of dead zones and flow irregularities

This rigorous design approach eliminates outdated assumptions that often lead to poorly sized PTUs, which become the choke point of the STP. Conventional designs frequently cause:

  • Frequent Overflow Issues – Inefficient screening and grit removal create hydraulic bottlenecks, leading to bypasses, untreated sewage discharge, and reduced system reliability.

  • Underutilization of STP Capacity – When PTUs restrict flow, they starve the STP of influent, preventing it from operating at full design capacity and efficiency.

With our advanced methodology, we ensure that PTUs are optimized for continuous, unrestricted flow, preventing capacity losses and ensuring maximum STP throughput and operational efficiency.

Optimized Screening & Grit Removal Technology

High-Efficiency Screening Solutions

  • Precise extraction ranging from 2mm to 6mm for maximum debris removal

  • Maintains low velocity across bars while keeping high approach velocity

  • Reduces sedimentation within the screen channel

  • Enhances debris capture and minimizes clogging

Advanced Grit & Oil Removal Systems

  • Vortex Grit Removal Systems – High-efficiency grit separation with minimal turbulence

  • Aerated Grit and Grease Removal Chambers – Combined system for superior removal efficiency

  • Detritors – Industry-proven grit and sediment separation technology

Superior Grit Washing & Organic Matter Removal
Our systems provide:

  • Drier, cleaner grit with minimal organic matter – Reduces foul odors and disposal cost

  • Optimized washing efficiency – Ensures high separation performance

  • Prevents organic carryover into grit disposal – Improves plant hygiene and reduces secondary pollution

Civil & Structural Design Expertise

A well-designed PTU requires a robust structural foundation to support long-term operation and prevent hydraulic inefficiencies. We provide:

 

  • Complete civil and structural engineering for pretreatment units

  • Optimized channel designs for smooth flow distribution

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