Chriwa Wasseraufbereitungstechnik GmbH - Waste Water Treatment, Caribbean

SBR technology for aerobic treatment of bevarage production waste water


On behalf of a beverage bottler for beer and soft drinks, CUSS built a waste water treatment plant on a Caribbean island in 2011. The mixed waste water discharged from the production facility was to be completely cleaned as part ofthe waste water treatment so that it could then be returned to the receiving waters with confidence. When designing industrial treatment plants, one particular challenge is often on how to cope with the fluctuating input of varying substances - this was also the case here.

The biological treatment stage forms the core of the treatment plant. The SBR technology (sequencing batch reactor) is often used for this kind of task. This technology is also ble to clean complex, highly polluted production waste water cost-effectively and reliably. For tasks of this kind, CUSS has developed processing concepts that take into consideration the project-specific conditions that ensure the reliable operation of the plant also in cases of extremely high peak flows.

These processes have been used in many cases and been optimised for a variety of conditions. The CUSS process engineers have been using this and other methods for more than 20 years. Based on the accumulated experience of our employees, the methods we use are constantly optimised and enhanced so that we are able to provide our clients with state-of-the-art technology.


IMG 2784 Karibik-webWaste water content

  • Sugar, yeast, brewers grain
  • Production residue from storage, processing and bottling
  • Glue and solids as well as cleaning solvents and acids from bottle cleaning
  • Mineral-based grease


Processing steps

  • echanical separation
  • Homogenisation and neutralization
  • SBR activation
  • Treatment of sludge

 AP Karibik web

Process description

Waste water from soft drink production is first directed into a mechanical separator. Oil and fat as well as particles capable of sedimentation are separated here. Apart from the main stream of waste water, yeast from beer production requires particular attention. Yeast can cause problems if it is fed untreated into the treatment plant. This partial waste stream is therefore pre-treated before it is added to the waste water stream in a controlled manner.

After primary treatment, homogenisation and neutralisation of the entire volume of waste water takes place. Then pre-treated waste water is given into biological treatment-executed as plant. The main task of the biological treatment is the elimination of the organic load, which is characteristic of waste water from this industry. Dissolved substances are synthesized by the activated sludge bacteria. Harmless metabolic products, primarily CO2.water and new biomass are the results.

The last phase of the cycle takes care of the separation of the water and sludge phase. Whilst the Clearwater phase can take place following the next cleaning step, it is possible to remove excess sludge at the same time.

Owing of sludge thickening .it can be disposed costeffectively and safely. The technology optimised by has proven to be extremely effective and  operationally more reliabie. This is achieved not only through the accurate calculation but also sizing of all plant components.

As a result of the multistage treatment and all considered substance streams, all client requirements have been met. and furthermore also the required BOO (biological oxygen demand) discharge value was well below required levels.

The scope of supply for the project characterizes by plant engineering and the entire planning and implemen tation by CUSS. A turnkey plant was handed over to the client after completion in 2011. From construction to a fully functional plant all from a single source. Since then, the plant has been operating without problems and to the client's full satisfaction.


Customer benefits

  • Low reactor volume required
  • High process reliability
  • Simple and low-maintenance treatment technology
  • Low investment and operating costs
  • Accurate control ofthe cleaning process
  • Variable process sequence possible if required


Figures - Data - Facts


Plant performence:
Waste water quantity approx. 450 m³/d
ongoing BOD reduction > 98%
BOD inflow: approx. 2.000 mg/l max.

Treats of production waste water from a beverage production plant

Scope of supply:
Turnkey project implementation: Design and implementation of construction, building supervision, process engineering and detailed engineering, supply and installation of the plant, personnel training, commissioning.

Completed 2011