Managing High-Strength Effluent in Food and Beverage Processing

In the food and beverage industry, wastewater is more than just a byproduct; it presents a complex management challenge. From dairies and breweries to large-scale meat-processing plants, the “strength” of effluent produced can be significantly higher than that of standard municipal sewage.

Effectively managing this high-strength effluent is crucial for regulatory compliance, environmental protection, and operational cost-efficiency. We specialise in customised solutions designed to handle complex organic loads.

What is High-Strength Effluent?

The “strength” of effluent is primarily determined by its organic loading. In food processing, this wastewater is often rich in dissolved sugars, proteins, and fats. If discharged untreated, these substances can deplete oxygen levels in local water systems, leading to severe environmental damage.

To manage this challenge, we focus on four critical areas:

1. Reducing Biological Oxygen Demand (BOD)

Biological Oxygen Demand (BOD) measures the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material in a water sample. Food and beverage processes often result in BOD levels that are ten to twenty times higher than those of domestic sewage. Our technology is specifically designed to tackle high BOD levels. By using a “fixed-film” process, the NuDisc® provides a stable environment for microorganisms to flourish, ensuring effective treatment even under sudden “shock loads” or fluctuating production volumes.

2. Managing Fats, Oils, and Grease (FOG) Wastewater

FOG is a significant challenge for any drainage system. In food processing, FOG wastewater can lead to “fatbergs,” pipe blockages, and equipment failures. Traditional grease traps only separate the grease; they do not eliminate it. We offer a more permanent solution with our biological dosing system, which uses enzyme-rich microorganisms to break down FOG into water and CO2, keeping your drains clear and ensuring compliance with trade effluent regulations.

3. Harnessing Anaerobic Digestion for High Loads

For industrial sites with exceptionally high organic concentrations, anaerobic digestion (AD) is a highly effective method. Unlike aerobic processes, which require constant energy-intensive aeration, anaerobic digestion breaks down organic matter in an oxygen-free environment.

• Energy Recovery: One major benefit of AD is the production of biogas (methane), which can be repurposed as a renewable energy source for the plant.
• Sludge Reduction: AD significantly decreases the volume of solid waste, reducing your costs for tankering and disposal.

4. Food Wastewater Treatment: The Multi-Stage Approach

Effective food wastewater treatment is rarely a single-step process. To meet the stringent discharge standards set by the Environment Agency, a multi-stage strategy is often necessary:

• Pre-treatment: Using screens and Dispersed Air Flotation (DAF) to remove suspended solids.
• Biological Treatment: Utilising Rotating Biological Contactor (RBC) or Submerged Aerated Filter (SAF) systems for BOD and nutrient removal.
• Tertiary Treatment: Polishing the effluent through UV disinfection or filtration for potential water reuse.

Why Choose KEE?

With over 70 years of experience and 350,000 installations worldwide, KEE provides a comprehensive solution for industrial clients. Whether you need a complete system, a specialised treatment solution, or ongoing support, our nationwide team of engineers is ready to assist your facility.

Is your wastewater system struggling with high-strength loads? Contact us to book a site visit and ensure your facility remains compliant, efficient, and sustainable.