Moroccan dairy installs energy-efficient wastewater treatment with water recycling
Ensures compliance with legal requirements, odour suppression and water recycling for irrigation
A wastewater treatment plant with water recycling was installed in a milk derivatives production site in Morocco which mainly processes milk and yoghurt. The objective was to ensure compliance with the legal requirements for discharge into the local sewage system. Moroccan regulations are primarily concerned with temperature, pH, COD, BOD5, fats, and solids content. Build-up of odours is also to be suppressed and the treatment should be designed to be as sustainable as possible.
Processing milk produces large quantities of fat and other organic residues. Some of this ends up in the production wastewater which can lead to unpleasant odours. The resulting sludge gas and decomposition products can lead to damage to the municipal sewage system and its ecosystem.
A wastewater treatment plant is to be planned and built which will safely reduce the very high organic wastewater load to the required threshold values despite the limited available space. It is not unusual for the daily wastewater quantities and loads from production to vary from day to day. In addition to this, there should be no build-up of odours from the plant solution and the sludge treatment should achieve a specified dry matter content.
To meet the objectives, EnviroChemie planned, installed and commissioned a multi-stage plant solution.
A high-performance screen filter removes the solids from the daily wastewater quantities. These solids are subsequently stored in a buffer tank. A Flomar® dissolved-air flotation system then removes the inorganic and organic wastewater components, effectively and economically reducing the wastewater contamination load. Chemical-physical conditioning is provided upstream of the continuously operating flotation stage. This removes up to 98% of the solids and fats and up to 60% COD.
The wastewater is then sent to a Biomar® OKB (Oxygenating Compact Biology) aerobic reactor where the COD and BOD load is reduced further. The Biomar® OKB technology makes use the ability of naturally growing organisms to convert contaminants, pollutants or impurities in the wastewater into biological sludge or to remove them. A fine-bubble diffuser ensures continuous aeration in the activation plant. The necessary oxygen is delivered as atmospheric oxygen by a phased blower station. The warmed air is fed through pipes into the aeration cells laid along the bottom.
The biosludge settles in the post treatment facility which is located in the centre of the activation container. From there, most of the settled sludge is then returned radially to the aeration tank by means of an adjustable hyperboloid stirrer. Some of it accumulates as excess sludge and is removed. The removed sludge is finally dewatered by a screw compactor.
The buffer tank, sludge tank and flotation system are covered. Gases which occur are extracted and fed into the biological process to break down the odour molecules. The plant is completely automated and all the motors have frequency converters to optimise energy consumption.
The recently installed, energy-efficient plant solution for wastewater treatment easily meets all the required purification goals (see Table 1). Odours are also effectively suppressed. A high degree of dewatering is achieved by the sludge treatment process with a dry matter content of approximately 25% TS.
All of the treated water is used for irrigation and cleaning the property or for washing HGVs.
EnviroChemie's subsidiary in Morocco supplies the water chemicals to operate the plant as well as customer service and provision of spare parts, ensuring the customer can always contact a local expert.
In the meat industry, for example, wastewater with a high organic load is produced during the cleaning of production plants.Read more
A food manufacturer has reduced water treatment chemical consumption and sludge disposal costs by using different products in its wastewater treatment plant.Read more
A large dairy uses a tailor-made plant solution from EnviroChemie to recycle its liquid waste and efficiently reduce energy consumption and operating costs.Read more
A multi-national dairy co-operative wanted to treat its vapour condensate sustainably at a German site and thus reduce its fresh water requirements and operating costs.Read more
The Norrmejerier dairies generate energy, conserve resources and reduce operating costs using a Biomar® anaerobic wastewater treatment system.Read more
Dairies use water for many different stages in the production process. There are often potential savings to be made here in terms of resources and energy. To achieve this, however, an integral view is required, since the cycles used in dairies, which have often grown over the years, are highly…Read more
With all-year-round reliability, the resource-efficient Biomar® aerobic technology reduces costsRead more
Ensures compliance with legal requirements, odour suppression and water recycling for irrigationRead more
The necessary process water for production facilities and power plants is supplied by EnviroChemie systems technology.Read more
A global corporation recycles 90% of the wastewater at its Brazilian cosmetics production site and reuses it in its production processes.Read more
ZEISS Sport Optics considerably reduces disposal costs at its Wetzlar site by using a compact Lugan® 20,000 flotation plant from EnviroChemie.Read more
At its Mettlach site, Villeroy & Boch is able to treat and recycle glazes recovered from its rinsing water using an Envopur® microfiltration plant from EnviroChemie.Read more
EnviroChemie provided the plant technology for mine water treatment, including water recycling, for a coal mine operated by SUEK, one of Russia’s largest coal producers.Read more
Energy-efficient and sustainable wastewater treatment and water recycling for laundry CWS-boco at its Solingen site, GermanyRead more
Galvamé opts for water recyclingRead more
General contact+49 6154 6998 100