Water Treatment for Food Production
B & V Effluent Services has been providing waste water management services to the food production industry for a number of years. As a result of this wealth of experience B & V Effluent services have a high level of technical expertise when it comes to providing a service to this industry in particular.
The production of food on a mass scale brings about a series of issues regarding the management of waste water to ensure that a producer is not only meeting limits and guidelines set out by their local authority but also ensuring that the highest level of efficiency is being achieved within an organisations process. Pressure can also come from supermarkets and other customers who might have their own environmental audit, which takes into consideration the effluent treatment process. Within the food industry B & V can help food production companies achieve these goals by managing the following key issues:
- Introduction of specialist cleaning programmes which have bespoke cleaning chemicals and effluent plant unable to cope.
- Batch production of specific bespoke products with their own unique formulations
- Frequent changes to formulations in terms of sauces etc.,
- Reduced water usage in cleaning programmes, leading to higher concentrations of effluent
- High pH detergents, which give high COD loading to the effluent
- Changes and restrictions to site’s discharge limits
- Limitations imposed as to site’s water intake
- Limitation of space to build effluent treatment systems
The following case study illustrates a classic example of how B & V Effluent Services have provided a great solution to a european food manufacturer, which solved the issues they were having on site as well as saving them money long term.
Site produces a range of cooked chicken and duck dishes for a range of supermarkets. One of their customers a major supermarket, wished to changed one of their formulations which meant that the colour of the red sauce changed this might seem insignificant, but the result was that whenever the effluent treatment plant was on this particular batch, the effluent treatment process struggled to treat the effluent produced and was close to breaching its discharge consent.
Tests were undertaken with the standard effluent and when site changed to one supermarkets range of sweet and sour sauce. The standard treatment would not work and therefore a number of solutions were debated
- Should site provide a separate tank or sump to collect the residue from the wash-down of this particular product and then try and blend it in with the rest of the week’s effluent
- Should site work with the supermarket to try and produce an alternative to their ingredients in this particular product
- Change the effluent treatment process
Because of lack of space in the factory the first solution could not be used, all the drains from the factory ran into one common interceptor which was then pumped to a small balance tank. Again due to lack of space the balance tank did not hold a day’s worth of effluent and therefore did not buffer out the extremes of a day’s production. Site was under pressure from the supermarket to introduce the new sauce, and therefore the conclusion was to try and change the effluent chemical treatment programme.
It was found that the treatment using an inorganic acidic coagulant was still able to split out the solids and along with pH correction this part of the effluent treatment did not have to change. However the final part of the treatment was to add a polymer to bind the solids together within a DAF cell.
After testing it was found that a completely different polymer was needed changing the polymer from a cationic to anionic, to accommodate this site were provided with an additional polymer make-up system and separate dosing lines into the flocculator pipework.
Working in conjunction with site production staff as to when production were on the problem sauce it became relatively easy to predict when the effluent was likely to change and by ensuring the production runs were only undertaken when the effluent plant was manned the effluent was still treatable. Since the introduction of this relatively easy solution site has always been able to maintain its discharge consent of Chemical Oxygen Demands of less than 1,000mg/l and Suspended Solids of less than 150mg/l
Going forward site are occasionally asked by supermarkets to change their formulations, whenever this occurs then assessment is carried out during trials of batch rinse water to ensure that the chemical treatment programme can still accommodate the discharge effluent to the plant
To find more out about what B & V can do for you please send us an enquiry telling us a little about your company and your waste water problems and we will get in touch about the solutions we can provide. To do this simply fill out the enquiry form in the side bar and we will endeavour to get back to you in the next 2 working days.