In the beverage and spirit industry, the discharges show an extreme irregularity in terms of flows, wastewater composition, contaminants concentration and production seasonality.
Reducing wastewater from beverage manufacturing industry.
Water is the basic raw material to produce beverages, that’s why Salher analyzes the most convenient treatment according to the production volume, manufacturing methods and the required parameters.
These analysis tasks are performed for the production process water and the discharge wastewater.
Wineries water treatment.
The production of one liter of wine requires between 30 and 250 liters of water. Wine discharges are not toxic, however, they have an important pollutant effect due to the high organic load.
The wineries discharges can be variable – contaminant concentration and volume- due to the seasonal nature of the production (water use achieves up to 60% of annual consumption during harvest and wine decanting), its volume of production and according to the other operations performed such as elaboration, ageing, storage and bottling.
There are several stages and solutions for winery wastewater treatment:
Pretreatment and advanced primary treatments.
Liquid-solid separation is required to avoid any risk of clogging in pipes, pumps and other water treatment elements.
Salher recommends screening system to separate coarse and fine particles (larger than 1 mm) such as seeds, peels, branches, etc.
Throughout the primary treatment, we recommend a DAF (Dissolved Air Flotation) equip, as our Vespa, to remove the thinnest solid particles and the floating waste present in the water (oils, greases, etc.).
The dissolved air flotation process will be preceded by a Coagulation-Flocculation treatment known as “flows regulation/contaminating loads equalization tanks” to improve the performance of the separation of the suspended solid. This physical-chemical treatment helps reducing the flows variations and increases the removal efficiency of suspended solids, oils and greases to more than 95%. This implies also a reduction of BOD5 equal or higher than 50%.
Secondary biological treatment.
The biological treatment aims to remove the organic matter (BOD5), suspended matter (SM), as well as the oxidation of reduced nitrogen (NTK) to nitrate (NO³) => nitrification phase.
Salher offers four different types of secondary treatment:
1. Low load activated sludge treatment
With this treatment, the removal of organic matter and colloidal solids present in wastewater is performed in an aerobic environment through the intervention of microorganisms for degradation.
For a better productivity, an oxygen supply and distribution system is added in the biological reactor through a fine bubble diffusers grid. These diffusers (60 microns) achieve high performances in the oxygen transfer processes thanks to their little diameter and slow rise up to the surface.
The clarification stage, which is also called “secondary settling ” aims to separate by density difference the biological solids from water, thus obtaining sludge in the lower part of the reactor and a clarified water through the outlet of the equipment.
2. Moving bed Biofilm Reactor process (MBBR)
It reduces the volume of biological reactors. A settling tank shall be installed for the removal of the sludge in the tank.
3. Membrane bioreactor process (MBR)
The ultrafiltration membranes system substitutes the conventional activated sludge treatment and combines filtration, aeration and clarification in a single operation. Its compactness and modularity are also remarkable. This system is very compact, and if necessary, it can treat bigger flows, it is enough to increase of number of filter cartridges in a quick and easy way. There are the main advantages of the MBR treatment, compared to other options:
- Lower volume in the biological reactor,
- Lower production of sludge, around 50-60% compared to the low load activated sludge treatment,
- Better outlet water quality,
- Possible water reuse,
- Compliance with the strictest environmental regulations.
4. Biological treatment with ultrafiltration system by ceramic membrane.
This system consists of the combination of a biological reactor and an external ultrafiltration with inorganic membranes.
Complementary solutions for winery wastewater management.
To avoid the installation of a wastewater treatment plant with higher volume than the appropriate, the following measures shall be implemented:
- Separate industrial wastewater from the urban wastewater (water issued from sinks) and rainwater for irrigation because they do not have the same contamination values.
- Perform a prior dry cleaning of the equipment to eliminate the sub-products (solids and wine lees). Use pressurized water afterwards.
- Raise awareness and train employees regarding water use.External solutions to reduce the flow and contamination of wastewater in a warehouse.
Havana Club rum factory at Cuba
Complete WWTP with plates tanks.
Morga Txakoli Winery at Spain
Complete WWTP with membrane bioreactor and ultrafiltration ceramic membranes.
Sumesa juicy Factory at Ecuador
EDAR completa con tratamiento biológico por fangos activos de baja carga en contenedor
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Engineering – Wastewater treatment – Purification – Liquid/solids separation equipment for industrial and municipal process applications – Surface water – Groundwater – Water Reuse – Drinking Water – Hydrocarbon and Oil Water Separation