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Abstract

There are two kinds of wastewater that may originate at a dairy plant: post-production and nonproduction waste. Dairy wastewater treatment is a process consisting of several stages. In the pre-treatment stage, fat and sand is removed from wastewater. The second stage treatment consists mainly in aerobic treatment with activated sludge, advanced oxidation methods and an anaerobic treatment. In recent years, more and more plants have been treating their wastewater in SBR type reactors, because they are flexible at work and enable the user to change conditions to suit the variable quality of raw wastewater. The research on the kinetics of the wastewater treatment process in an SBR reactor has been conducted. The removal of several factors such as nitrogen compounds, TOC, phosphorus and the kinetics of oxygen concentration and redox potential have been analyzed. The experiment was carried out in two 12 dm3 volume SBR reactors in a lab-scale. The SBR reactors were operated with a cycle time of 12 hours with three hours of filling, seven hours of aeration, an hour of sedimentation, half an hour of decantation and half an hour of technical break. In presented research average parameters of raw wastewater were: TOC 329 mg C/dm3, ammonium nitrogen I I. 15 mg NN1,/dm3, and total phosphorus 15.42 mg P/dm3.
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Authors and Affiliations

Mariusz Wojnicz
Anna M. Anielak
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Abstract

The aim of the article is to determine the main factors responsible for development of Podlaskie Voivodeship in the last 15 years and to answer the question whether they were suffi ciently strong impulse to divert the region from its development path. The research is based on the results of in-depth interviews with the main actors of the regional scene (representing administration, business and science). Statistical data and strategic documents (regional development strategies and regional innovation strategies) was employed in a supporting role. The development of the region has long been based on natural resources, especially agri-food industry (in particular milk production) and tourism. Implementing the concept of smart specialization in the region is seen as a big chance for agri-food industry and sectors linked in the value chain. However the chance to changing the development path of the whole region and moving to higher levels of innovation is very doubtful.

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Authors and Affiliations

Anna Dąbrowska

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