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Methods of processing whey waste from dairies. A review

Poništ Juraj, Dubšíková Veronika, Schwarz Marián, Samešová Dagmar

Environment Protection Engineering

2021

Vol. 47, nr 4

67--84

The purpose of the study was to evaluate the methods of processing whey. The valorization method is suitable for the use of cheese whey and whey permeate to produce beverages with or without microbial conversion. However, this method does not ensure microbial conversion of lactose. Therefore, the organic load will not be reduced. The main advantage of aerobic decomposition is the relatively rapid degradation of organic matter. However, the high organic load in the crude cheese whey makes aerobic decomposition unsuitable and restrictions on oxygen transport may occur. Anaerobic decomposition can be used in various areas for the treatment of waste with a high organic load. The disadvantage of anaerobic processes is a higher cost compared to aerobic treatment. The combination of individual technologies significantly reduces the hydraulic retention time of the aerobic process and improves waste treatment. At present, there is a lack of studies in this area.

Current state of odour nuisance from biogas plants in Slovakia

Salva Jozef, Poništ Juraj, Lobotková Martina, Vanek Miroslav, Schwarz Marián, Veverková Darina

Environment Protection Engineering

2021

Vol. 47, nr 3

67--81

The article deals with the current state of odor nuisance from biogas plants in Slovakia in the context of changes in the legislative regulatory for these operations regarding increased odor control requirements. Research is focused on direct analysis of odor status in the vicinity of existing biogas plant operations in regions of Slovakia based on information obtained from local government representatives and the competent administrative authorities. Biogas plants were divided into groups according to identified frequency of odor. The research also focuses on the analysis of the separation distance of biogas plants from the nearest residential area and the impact of the storing method of inputs and outputs from the biogas process on odor. It is concluded that measures adopted in the amendment will not affect the already satisfactory odor situation in location of majority of biogas plants and most of the signs of odor are caused by a relatively small percentage of biogas plants. The method of storing has only a secondary synergistic effect and primary factors of odor formation are different.