Food Processing Wastewater Treatment

Our food processing wastewater solutions help reduce operating costs, improve wastewater treatment efficiency and help recover valuable by-products.

Food processing operations generate wastewater which can have high levels of organic and inorganic material. Pre-treatment before discharging to a sewer system significantly reduces fees, as well as recovering potentially valuable by-products.

Food processing facilities require water for activities that include conveying product, washing, processing and clean-in-place (CIP) operations. As a result, they typically generate a tremendous amount of wastewater, which often has very high levels of Total Suspended Solids (TSS), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), and Fats, Oils, & Greases (FOG).

Our food processing wastewater treatment technologies can help food manufacturers to save money on operations, improve treatment efficiency and recover and reuse by-products.

Our solutions for your sector

To learn more about how we can help specific food processing operations, visit our food processing sector pages:

Olive & Olive Oil Processing

Fruit & Vegetable Processing 

Meat & Poultry Processing 

Secondary & Further Processing 

Industrial silt, sand and sediment removal

Sediment Basin Replacement


Technologies: ultrafine rotating belt filtration

Ever-increasing sewer discharge fees can be a significant operational expense for food processors.  Separating by-product materials from flow streams allows much more cost-effective disposal as clean, dewatered materials may have possible reuse options, energy generation potential or in the very least are ready for landfill. The Hydro MicroScreen™ ultrafine rotating belt filter can reduce - or in some applications eliminate - sewer discharge fees.

In many cases, this dewatered material may have value; belt filtration can provide the opportunity to more cost-effectively sell solids into new markets, create additional product, or create biomass for waste to energy conversion. Dewatered solids also have less volume and weight, which decreases handling and transportation costs.

The Hydro MicroScreen™ is the ideal solution for food processors with residual solids in their flow following conventional screening.  Conventional screening systems typically remove solids 500 microns and larger while the Hydro MicroScreen™ can remove solids as fine as 100 microns.

Capturing much finer particles than conventional screening significantly reduces TSS, particulate BOD and COD.  In many cases, depending on the temperature, the system can also reduce FOG.  Hydro MicroScreen™ produces a clean dewatered output that can be easily transferred to other applications, re-used or more economically sent to disposal. It depends on your site-specific conditions and application but the Hydro MicroScreen™ typically removes up to 70% TSS, 40% particulate BOD, and 40% of FOG.

Protect Dissolved Air Filtration (DAF) systems

The Hydro MicroScreen™ does not require equalisation prior to screening and will reduce the TSS and particulate BOD going into a DAF.  Depending on influent temperature, the Hydro MicroScreen™ can often remove 20-40% of FOG. This reduces the load on an existing DAF system which helps achieve better performance. In new DAF installations a Hydro MicroScreen™ can reduce the size / capacity of the DAF system required.

Capture more solids

Wedgewire drum screens are typically offered in sizes that range from 250 – 1500 micron openings.  This means they will miss the materials that are smaller than that.  The Hydro MicroScreen™ can be sized to capture particles as small as 100 micron and larger. Finer solids are the most difficult to deal with and can contribute to a large portion of the total solids loading.

Additionally, drum screens require a separate compaction / dewatering system.  Compared to drum screens, the Hydro MicroScreen™ provides significantly better performance in TSS and BOD removal, uses less wash water, and does not require a separate compaction system.

Cut your sedimentation / clarification footprint

In addition to materials recovery and solids removal, the Hydro MicroScreen™ offers numerous benefits compared to conventional settling / sedimentation systems:

  • Uses just 15-30% of the energy
  • Provides superior solids dewatering
  • Reduces overall solids handling costs
  • Requires as little as 10% of the overall footprint
  • Reduces retention time
  • Increases plant capacity
  • Often does not require chemicals
  • Capital construction costs are just 20-30% of a conventional settling system

Technologies: sediment and sand removal

Sand and sediment can be abrasive and accelerate wear on washing, sorting, cutting, and pumping equipment - leading to increased maintenance, repair and associated downtime.  Additionally, its presence in water reduces the quality of your product as well as limiting your ability to reuse that water.  Sand and fine particles in your wastewater can substantially and unnecessarily increase sewer discharge fees.

Removing fine particles from your flow streams is one of the easiest ways to decrease your operational costs, increase your plant's efficiency, and increase the quality of your output and improve water reuse. We provide the best-performing liquid-solids systems on the market, and we specialise in creating site-specific solutions that deliver a rapid ROI.

Sand removal benefits

Some of the benefits of sand and sediment removal systems such as the HeadCell®, TeaCup® and Grit King® include:

  • Much smaller footprint than conventional sedimentation 
  • Not subject to thermal short circuiting 
  • Removes finer grit (95% of all grit 75 micron and larger) than other technologies
  • Virtually no detention time required

Technologies: sludge screening 

Removing dry solids from primary process wastewater sludge can reduce the likelihood of blockages and help to protect other treatment processes.

Our Hydro-Sludge® Screen is a superior sludge processing system that is designed for quick, simple and safe maintenance, with a self-lubricating cone to cut maintenance requirements and a discharge section with easy access for servicing and inspection.

Delivering screenings at up to 40 % total solids, the Hydro-Sludge® Screen removes, compacts and dewaters coarse material in sludge to reduce the solids handling burden, cutting the cost of screen solids management, transport and disposal.

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