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Fruit & Vegetable Processing Wastewater Treatment
Fruit and vegetable processors generate large volumes of wastewater that require treatment before it can be discharged. It is a unique kind of wastewater due to its composition. Typically, wastewater from these processing plants contains rejected fruit and vegetables, pesticides, fibers, soil, as well as detergents, and other cleaning agents.
Naturally, it requires a specialized treatment process to remove these contaminants. Enduramaxx stocks everything that businesses need for a complete wastewater treatment system. With a good treatment system, it is possible to remove fruit and vegetable wastewater by up to 95%.
Characteristics of Fruit & Vegetable Processing Wastewater
Like many industries that produce wastewater, there is simply no one size fits all approach to any treatment method. This is due to the variability in composition and volume which can be impacted by the type of products being produced, seasonal changes, and other factors.
However, the wastewater from fruit & vegetable processing plants often contains high amounts of BOD, TSS (total suspended solids), FOG (fats, oils, and grease), as well as high Ph levels and varying temperatures. Wastewater from these industries can also have a strong odour, particularly in industries where onions are being processed.
Depending on the business, site location, and budget, some or all the above factors may vary. Enduramaxx is staffed by experts in wastewater management who are happy to discuss options that are tailored to your needs.
What is the environmental impact of wastewater?
Due to the varying composition, the effects on the environment will naturally vary. The key risks are the increased oxygen demand on the water. High levels of BOD can reduce the dissolved oxygen (DO) in the receiving environment and result in a lack of support for aquatic life. The reduction or absence of oxygen can increase microbial decomposition rates resulting in rising methane, hydrogen sulfide, and carbon dioxide levels.
There is also an increased level of turbidity in this wastewater due to high amounts of TSS and this negatively impacts aquatic life. Settled solids can also harm bottom dwellers and reduce oxygen levels.
Fruit & Vegetable Wastewater Treatment Methods
Pretreatment is a necessary part of trade effluent treatment for fruit and vegetable processing. The most common of these involves screening for removal of TSS and other large particles. Rotary screens and vibrating screens are commonly used in the fruit and vegetable industry and are cost-effective options. These screens prevent clogging or damage to pipes and other processing equipment.
There is also the use of DAF tanks (dissolved air floatation) for the removal of particles. DAF involves the addition of oxygen into the wastewater to create flocs which can then be removed from the wastewater. Flow equalization and adjustment of pH levels are often implemented at an early stage. Buffer tanks can assist in this operation and balance potential fluctuations in pH levels.
Lettuce washing wastewater treatment – View our case study here
FOG Reduction in Wastewater Processing
Dealing with (FOG) at an early stage is an important task for fruit and vegetable processing plants. The risk with high FOG levels continuing through the treatment system is that it will cool, solidify, and congeal and can damage pipes and tanks. It can also in turn increase sludge volume which creates problems in flocculation tanks.
Bioaugmentation is an additive process of introducing microorganisms into FOG to break down bonds between fatty acids and glycerol. This requires the regular introduction of new microorganisms. Alternatively, indigenous bacteria can be stimulated to biodegrade FOG. This has a strong impact on the TSS levels: reducing sludge volume and improving settlement.
Enduramaxx – Fruit & Vegetable Processing Wastewater Treatment
Need more details on Fruit & Vegetable Processing Wastewater? Enduramaxx’s expert staff are more than happy to discuss treatment options. Visit Enduramaxx wastewater treatment tanks today to see a full range of products.
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