Sanitary hygienic assessment of drinking water from underground source at a pig farm

G. Kostadinova
Abstract. The aim of the study was to investigate and assess the quality of drinking water, obtained from own well source at a pig farm (with an average daily number of reared pigs 532 units), situated in South Bulgaria, Plovdiv Municipality, on the base of main organoleptic, physical, chemical and microbiological indices. For this purpose once a month (from July 2009 to March 2010.) water samples were collected and analyzed by reference methods of Bulgarian State Standard. It was found that the quality of water correspond to the norms concerning organoleptic indices (smell – State 0, norm up to State 2; color – 5°color degrees, norm up to 15°color degrees; visibility – over 65 cm thickness of the water plast through that should clearly seen special text, norm at least 30 cm; taste – no flavor, norm no flavor), chemical indices (pH 7.45÷7.75, norm 6.5–9.5; oxidizability 0.72÷2.16 mg O /L, norm up to 5.0 mg O /L; total hardness 2.82÷4.45 2 2 mg Σqv/L, norm up to 12.0 mg Σqv/L; content of chlorides 20.3÷36.0 mg/l, norm up to 250.0 mg/L, ammonia – not proved, norm up to 0.50 mg/L, nitrites 0.007- 0.094 mg/L, norm up to 0.50 mg/L, and nitrates 3.0÷25.0 mg/L, norm up to 50.0 mg/L) and total number of cultivable microorganisms (5 -18 CFU/mL), norm – without significant variability of the index value of the investigated water. The only exception was found for the water temperature, whose maximum values exceeded the requirements of the standard (16 oC) and number of Escherichia coli (Coliform’s test), which values were higher than norm (0 CFU/100 mL), for both indices during five months from the studied period. The deviation in the quality of water in respect content of E. coli suggests anthropogenic pollution on groundwater of the own well with coliform bacteria, containing in manure and urine from the pigs in the farm. Organoleptic, chemical and microbiological characteristics of the sampled water meet the requirements of the Dutch standard for drinking water for pigs. This standard allows higher level of oxygenation of the water and higher levels of ammonium and nitrate content in water compared to Bulgarian standard for humans and animals drinking water. Perhaps time has come, as in the Netherlands to develop a national standard for drinking water, which be applied only to farm animals.

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Effect of the environment on the quality of flour from common winter wheat cultivars

I. Stoeva, E. Penchev
Abstract. In relation to the new breeding strategies, during 2009 – 2011 an investigation was carried out on the most recent cultivars of Dobrudzha Agricultural Institute – General Toshevo (Pchelina, Goritsa, Kalina, Kiara, Kossara, Katarzhina) with the aim to determine the range of variation of their technological characteristics depending on the environmental conditions. By using PCI and discriminant analysis, the effect of some of these quality indices on bread volume was determined. It was found out that the investigated cultivars possess differently determined optimum of expression of the quality indices according to their genotype and the year conditions. During the period of investigation the cultivars did not demonstrate advantages of the properties of flour over the standards Aglika and Sadovo 1. It was established that the main component consisting of the variables time of dough development, dough stability by pharinograph and sedimentation had significant contribution to the total variation of bread volume. The main differentiation of the cultivars by bread volume was due to sedimentation, time for dough development, dough stability and the value of quality by pharinograph. On this basis the cultivars were divided into 2 quality groups: 1) excellent bread making properties: Pchelina, Goritsa, Kiara and Aglika; 2) very good and good bread making properties: Kalina, Kossara, Katarzhina and Sadovo1, which confirmed their already known distribution by breadmaking quality.

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Water quality assessment from own source at poultry farm located in rural region in South Bulgaria

R. Stefanova, G. Kostadinova, N. Georgieva
Abstract. The aim of the study was to investigate and assess the quality of water, obtained from own well source at a poultry farm (with capacity 13 350 hens and turkeys), situated in rural area in South Bulgaria, on the basis of organoleptic (smell, color, visibility, taste), physical (temperature) and chemical (pH, permanganate oxidation, hardness, chlorides, ammonia, nitrates, nitrites) indices. It was found that the quality of water corresponded to the norms concerning the organoleptic (smell – 0 ball, norm up to 2 ball; color – 5°, norm up to 15°; visibility – over 60 cm thickness of water plast, norm at least 30 cm; taste – no flavor, norm no flavor), physical (temperature – 13.5-16.8 oC, norm 6-16 oC) and chemical (pH 6.80÷7.15, norm 6.5-9.5; oxidizability 0.24÷0.72 mg O /l, norm up to 5.0 2 mg O /l; hardness 6.49÷7.55 mg Σqv/l, norm up to 12.0 mg Σqv/l; chlorides 162.0÷197.0 mg/l, norm up to 250.0 mg/l and nitrites 0.0÷0.021 mg/l, norm up to 2 0.5 mg/l) indices. The most significant deviation from quality standards were observed regarding the concentration of ammonia (0.01÷0.6, norm up to 0.5 mg/l) and nitrates (58.0÷110.0 mg/l, norm up to 50.0 mg/l).

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