Treatment Technologies at Breweries

Where the brewery does not discharge to a municipal sewer then primary and secondary treatment of the effluent is required. Primary treatment facilities may include: pH adjustment; roughing screens; grit settling chambers; and a clarifier. Choices of processes to remove BOD5 in a secondary treatment stage include:
anaerobic treatment followed by aerobic treatment and activated sludge systems. Sludges from the clarifier are dewatered and disposed through incineration, or to an approved landfill.Where the brewery is permitted to discharge to a municipal sewer, pretreatment may be required to meet municipal bylaws and/or to lessen the load on the municipal treatment imposed on effluent volume, and on the

suspended and BOD51 loads, by the municipality may encourage the brewery to install its own treatment facility. Modern plants using good industrial practices are able to achieve the following in terms of pollutant loads: Water conservation and recycling will allow water consumption to be controlled to a minimum. A new brewery should target on achieving an effluent range of 3-5 m3/m3 beer produced. Provision for recycle of liquors and reuse of wash waters will help reduce the total volume of liquid effluent. A new brewery should target on achieving a treated effluent that has less than 0.3 kilograms (kg) of BOD5/m3 beer produced and 0.3 kg of suspended solids/m3 beer produced (assumes to receiving waters). Odor emissions can be minimized if exhaust vapors are condensed before they are released to the atmosphere or if they are sent to the boiler and burned.

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