sewer pretreatment system

December 8, 2023

• Electric or air-driven pump and control systems
• Water polishing packs for strict effluent requirements
• Ozone systems for odor control
• Ozone systems for odor control
• Additional water treatment systems for differing site conditions

5 Stages Of Oil Water Separation Diagram

5 Stages of Oil Water Separation Diagram

  1. The free oil (150 micron in size or greater) is separated in the inlet quiescent zone.
  2. The settleable solids will flow downward into the hopper section for removal.
  3. The suspended solids and dispersed oil will flow upward through the inclined plates
    section, where most of the suspended solids will slide down the plates into the hopper.
  4. The remaining suspended solids and dispersed oil will flow into the separation
    compartment where the coalescing plates will separate the oil 30 micron or greater to
    the surface for removal .
  5. The flow of water will go over the overflow weir plate into the clean water compartment
    and then discharge to the sewer.

April 22, 2007

Sewer Pretreatment System
Forklift Dealer has an SPT-10 Sewer Discharge System installed.

Location: Springdale, AR

During construction of a new wash bay facility, a forklift dealer/distributor enlisted our help to design a wash bay and install a sewer pretreatment system. While testing the SPT-10 Sewer Discharge System for the initial start-up, we discovered that the wash bay sump pit had a slow but potentially dangerous leak. This leak, if not corrected, would have lead to groundwater contamination with oily waste water and wash water from batteries. This deficiency had to be corrected prior to use of the wash bay.

SOLUTION: The fix needed to be permanent and 100% effective to protect the customer’s interests. If a leak contaminated the ground water and associated soils, clean-up could cost tens of thousands, if not hundreds of thousands of dollars.

Several solutions were developed including lining the sump with a water-proof grouting material, installing a stainless steel liner in the sump, and re-pouring the concrete. After analyzing all of the solutions, they decided that the water-proof grouting option would provide the best protection for the money.


RESULTS: Since the problem was caught before washing operations commenced, no dirty, oily water leaked into the groundwater and no contamination occurred. The customer is very happy with the sewer discharge system which was designed to automatically pull water from the sump.

North Carolina


At, we have been specializing in high tech, custom-engineered solutions to complex washing and wastewater issues since 1991.
+ 1 800-453-8639


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