Food industry wastewater treatment

In this section, we will discuss selected anaerobic treatment systems that are in use for food industry wastewater treatment. 

Aerobic treatment systems can be used for the food industry wastewater treatment as well. However, if the organic strength is very high, the use of aerobic systems may not be effective. A combination of anaerobic/aerobic treatment may be necessary. 

Apart from the conventional technologies, there are several emerging technologies for the food industry wastewater treatment. 

Rajinikanth Rajagopal (sustainable agro-food industrial wastewater treatment). Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Quebec, QC... 

Pretreatment is necessary for the treatment of the food industry wastewater. Pretreatment options such as flow equalization and neutralization, screening, FOG separation, acidification, coagulation-flocculation, sedimentation, and DAF are available. Selecting the appropriate technology depends on the wastewater characteristics. 

Due to the higher amounts of organic pollutants in the food industry wastewater, conventional biological treatment systems can be used. 

Liquid membrane separation processes are widely used in biochemical processing, in industrial wastewater treatment, in gas separations, in food and beverage production, and in pharmaceutical apphcations. Below the reader can find some fields where research, development and scale-up efforts are expected ... 

Characteristics of membrane modules are summarised in Table 1.12. The spiral wound (SW) module shown in Figure 1.18 is used in all RO and NF applications. The RO hollow-fibre (FIF) module, similar to the one shown in Figure 1.19, is now manufactured by only by Toyobo, and is used for seawater desalination. UF HF membrane (see Figure 1.3) was used extensively in the dairy industry, but it has largely been replaced by SW modules. However, cross-flow HF modules are commorJy used in food processing and industrial wastewater treatment [18, 31]. 

PHAs can be produced from waste materials. Waste materials or wastewater may be used to produce PHAs with a reduction in cost. The production of PHB from the waste-activated sludge generated by a combined dairy and food processing industry wastewater treatment plant has been evaluated. Deproteinized jowar grain-based distillery spentwash yielded 42.3 wt% PHB, followed by filtered rice grain-based distillery spentwash, which yielded 40wt%PHB. 

H2S is responsible for most of the odor problems assoeiated with brewing and food processing wastewater treatment. Heavier than air, colorless, corrosive, and extremely toxic, it raises serious woikplace health and safety concerns [109], HjS was measured directly by lAMS, which yielded a cahbiation curve with 0.996 R ) and a detection hmit of 0.05 ppm, while the limit of detection (LOD) by conventional MS with El was 100 ppm, due to interference by the isotope. These results demonstrate the possibility not only of measirring odors but also of monitoring the quahty control of irrdoors, foods, industrial fadhties, arrd so orr. 

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