scholarly journals DETERMINATION OF THE DISINFECTANT ACTION OF CAUSTIC LIME ON THE MICROFLORA OF SLUDGE OF WASTEWATER OF CLEANING FACILITIES FOR SEWERAGE AND CATTLE-BREEDING COMPLEXES

2019 ◽  
Vol 98 (5) ◽  
pp. 483-488
Author(s):  
Piotr V. Zhuravlev ◽  
V. V. Aleshnya ◽  
B. I. Marchenko
Keyword(s):  
Sewage Sludge ◽  
Microbial Contamination ◽  
Main Task ◽  
Pathogenic Microorganisms ◽  
Liquid Manure ◽  
Cattle Breeding ◽  
Household Wastewater ◽  
Total Death ◽  
The Impact

Introduction. The main task of treating sewage sludge is to obtain the final product, the properties of which would ensure the possibility of its utilization and minimize the damage to the environment. The sanitary and hygiene characteristics of the sediment are assessed by the presence of pathogenic microorganisms and helminths eggs. The degree of disinfection of the sediments is controlled according to SanPiN 2.1.7.573 - 96. The objective of the work. Determination of optimal doses of caustic lime for disinfection of microbial contamination of sewage sludge of household wastewater of sewerage cleaning facilities (SCF) and liquid manure of the swine complex. Material and methods. The object of the study were microbial communities of the sludge of the SCF household wastewater and liquid manure of the swine complex. Standard microbiological research methods were used in the work according to MU 2.1.5.800 - 99 and MR N FTs/4022. For representativeness, analyses were performed in triplicate. Results. Caustic lime was added in the amount of 1 to 10% of the volume (mass) of the sludge under study into the sludge of household wastewater (humidity of 97 - 98%). The contact time was 0.5 hours, 1 hour, 3 hours. At a concentration of caustic lime of 5 and 6%, the absence of microflora was noted after 1 hour, at a concentration of caustic lime 8 - 10% - after 0.5 hours. After 3 hours, for any amount of caustic lime (from 1 to 10%) in the native sludge of wastewater sewerage, all the microorganisms under study were not shown. Into the liquid manure (humidity less than 85%), caustic lime was added in the amount of 4 - 10% of the volume (mass) of the material being examined. The exposure was of 1 and 3 hours. The complete death of microbes at any exposure was observed at a concentration of caustic lime 9 and 10%. Conclusion. The investigations have shown the dynamics of death of microorganisms in studying the impact of caustic lime on both native and sterilized material to be the same. The total death of microorganisms during the treatment of sludge from household wastewater was observed at a concentration of caustic lime of 7 - 9%. The complete death of microbes in liquid manure (native and sterilized) at any exposure was observed at a concentration of caustic lime 9 and 10%.

scholarly journals Assessment of the impact wastewater of dairy farms on soil microbiota

2021 ◽  
pp. 113-118
Author(s):  
Ye. Kryvokhyzha
Keyword(s):  
Dairy Farms ◽  
Cattle Breeding ◽  
Soil Microbiota ◽  
Internal Surfaces ◽  
Number Of Microorganisms ◽  
Negative Effect ◽  
Breeding Farms ◽  
The Impact ◽  
Different Doses

In the production of milk on cattle-breeding farms and complexes large amount of wastewater is formed containing significant numbers of chemicals and is ecologically hazardous source of pollution of water and soil resources. Wastewater of dairy farms contain natural animal excretions, exhaust solutions of cleaning and disinfecting agents, milk residue which is washed off from internal surfaces of milking equipment, residues of feed, litter, dirt, which is washed off during washing of walls and floor of dairy cow house. Since such wastewater contain valuable organic substances they are used to fertilize plants. There are technologies of safe use of wastewater from cattle-breeding farms to fertilize pastures. Also wastewater used as fertilizer in cultivation of sugar beets, tomatoes, cucumbers, spinach, cabbage and the like. It is expedient determination of the influence of wastewater used for the fertilizer of agricultural cultures, on the soil microbiota. After all, soil fertility is inextricably linked with microorganisms that inhabit her. The aim of the work was carrying out of an assessment of influence of wastewater from dairy farms on the soil microbiota. Samples of soil for microbiological studies were selected in 20 centimetre thickness of top layer after application of wastewater of dairy farms. The total microorganism number was determined the method of sowing of soil suspension of corresponding dilutions on nutrient medium of meat-and-peptone agar (MPA). Micromycetes on Chapek medium.  The state of soil microorganisms after application in her different doses of wastewater of dairy farms was investigated. It is established, that the total number of microorganisms in soil when accounting 12 days later after application of wastewater in quantities of 500 l/ha exceeded control by 7.4%. At doses of 600 l/ha and 700 l/ha by 9.8% and 12.4% accordingly. 30 days later after application of waste-water the number of microorganisms almost did not differ from control. It was observed that after application of wastewater increase the total number of micromycetes. 12 days later after application of dose 500 l/ha,  of number of micromycetes was increased on average by 14,6%; in dose of 600 l/ha by 18.0%; in dose of 700 l/ha — by 19.6%. 30 days later after application of wastewater the total number of micromycetes exceeded control by 1.5%. It is defined, that wastewater of dairy farms in doses of 500–700 l/ha do not exert negative effect on soil microbiota.

scholarly journals NATURAL AND CLIMATIC CRISES AS A FACTOR OF CULTURAL AND ECONOMIC CHANGES IN THE NEOLITHIC–ENEOLITHIC OF THE LOWER VOLGA REGION

2021 ◽  
Vol 72 (3) ◽  
pp. 15-25
Author(s):  
Alexander A. Vybornov ◽  
◽  
Marianna A. Kulkova ◽  
Natalya S. Doga ◽  
◽  
...  
Keyword(s):  
Volga Region ◽  
Archaeological Sites ◽  
Cattle Breeding ◽  
Radiocarbon Dates ◽  
Lower Volga Region ◽  
Economic Changes ◽  
Lower Volga ◽  
The Impact ◽  
Technological Analysis

The Lower Volga region is important for studying natural and climatic crises as a factor of cultural and economic changes since the local Neolithic and Eneolithic societies are marked by the early appearance of ceramics, cattle breeding and copper items. However, the impact of natural and climatic crises on these processes has not been considered earlier for a number of reasons. First, most of the sites had not detailed information obtained by the analytic research on past environmental and climatic situation. Second, numerous and contradictory radiocarbon dates prevented from determination of the chronological frameworks of these processes. During the period of 2007–2020 the situation has begun to change with the appearance of new archaeological information including homogenous and stratified archaeological sites. The multidisciplinary research made it possible to obtain new data on the chronological framework of the Neolithic–Eneolithic cultures of the Lower Volga region in context of paleoclimatic reconstructions. The results of archaeozoological studies and technical-technological analysis of ceramics had a significant meaning too. Determination of the species composition helped to establish differences in zoological collections of the Neolithic of the Northern Caspian and the steppe Volga region. It was demonstrated that the emergence of a food producing economy in this territory is associated not with the Khvalynsk, but with the earlier Caspian culture. The entire set of data made it possible to bring the development of the question of environmental factors in cultural and economic changes in the Neolithic–Eneolithic of the Lower Volga region to a new level.

Changes in the Population Density of Pathogenic Microorganisms in Response to the Allelopathic Effect of Thypha Latifolia

2014 ◽  
Vol 1 (1) ◽  
pp. 31-36 ◽  
Author(s):  
O. Zhukorskiy ◽  
O. Gulay ◽  
V. Gulay ◽  
N. Tkachuk
Keyword(s):  
Cell Density ◽  
Allelopathic Effect ◽  
Pathogenic Microorganisms ◽  
Sterile Water ◽  
Erysipelothrix Rhusiopathiae ◽  
Pathogenic Leptospira ◽  
Favorable Conditions ◽  
And Control ◽  
The Impact ◽  
Control Samples

Aim. To determine the response of the populations of Erysipelothrix rhusiopathiae and Leptospira interrogans pathogenic microorganisms to the impact of broadleaf cattail (Thypha latifolia) root diffusates. Methods. Aqueous solutions of T. latifolia root diffusates were sterilized by vacuum fi ltration through the fi lters with 0.2-micron pore diameter. The experimental samples contained cattail secretions, sterile water, and cultures of E. rhusiopathiae or L. interrogans. The same amount of sterile water, as in the experimental samples, was used for the purpose of control, and the same quantity of microbial cultures was added in it. After exposure, the density of cells in the experimental and control samples was determined. Results. Root diffusates of T. latifolia caused an increase in cell density in the populations of E. rhusiopathiae throughout the whole range of the studied dilutions (1:10–1:10000). In the populations of the 6 studied serological variants of L. interrogans spirochetes (pomona, grippotyphosa, copenhageni, kabura, tarassovi, canicola), the action of broadleaf cattail root diffusates caused the decrease in cell density. A stimulatory effect was marked in the experimental samples of the pollonica serological variant of leptospira. Conclusions. The populations of E. rhusiopathiae and L. interrogans pathogenic microorganisms respond to the allelopathic effect of Thypha latifolia by changing the cell density. The obtained results provide the background to assume that broadleaf cattail thickets create favorable conditions for the existence of E. rhusiopathiae pathogen bacteria. The reduced cell density of L. interrogans in the experimental samples compared to the control samples observed under the infl uence of T. latifolia root diffusates suggests that reservoirs with broadleaf cattail thickets are marked by the unfavorable conditions for the existence of pathogenic leptospira (except L. pollonica).

Assessment of sensitivity of the efficiency of regional tax spending towards investment attractiveness of the types of economic activity carried out by the residents of advanced development territory

2020 ◽  
pp. 98-110
Author(s):  
Evgeniya Mikhailovna Popova ◽  
Guzel Mukhtarovna Guseinova ◽  
Sergei Borisovich Milov
Keyword(s):  
Economic Activity ◽  
Socioeconomic Development ◽  
Federal District ◽  
Tax Incentives ◽  
Capital Investments ◽  
The Subject ◽  
Investment Process ◽  
The Impact ◽  
Advanced Development

The deficit of subnational budgets and deceleration capital investments in multiple Russian regions increase the relevance of research aimed at improvement of tax incentivizing practice of the regional investment process. The studies focused on determination of the impact of socioeconomic and institutional factors upon the efficiency of investment tax expenses obtained wide circulation within the foreign scientific literature. The subject of this article is the assessment of sensitivity of the efficiency of regional tax expanses towards investment attractiveness of the types of economic activity carried out by the residents of territories of advanced socioeconomic development, created in the subjects of Far Easter Federal District. The scientific novelty and practical values of this research consists in substantiation of the reasonableness of assessment of investment attractiveness of the types of economic activity that are stimulated by tax incentives. Methodology for assessing investment attractiveness is proposed and tested. The conclusion is made that in case of low investment attractiveness of the type of economic activity, which was planned to support by tax incentives, it is required to conduct and additional analysis to avoid unjustified tax expanses.

The New Swedish Cyprus Expedition 2010. Excavations at Dromolaxia Vizatzia/Hala Sultan Tekke. Preliminary results

2011 ◽  
Vol 4 ◽  
pp. 69-98 ◽  
Author(s):  
Peter M. Fischer ◽  
Patrik Klingborg ◽  
Fanny Kärfve ◽  
Fredrika Kärfve ◽  
C. Hagberg ◽  
...  
Keyword(s):  
Ground Penetrating Radar ◽  
Main Task ◽  
Phase 2 ◽  
The North ◽  
12Th Century ◽  
Area 6 ◽  
Recent Phase ◽  
The Rich ◽  
Ground Penetrating

Determination of the complete occupational sequence of the site, including investigation of pre-12th century levels which were thoroughly studied by P. Åström since the 1970s, is the main task of the planned project. During the course of the expedition (NSCE11) in spring 2010 a ground-penetrating radar survey (GPR) was carried out at Dromolaxia Vizatzia/Hala Sultan Tekke in Area 6, leading to the discovery of a large Late Cypriote complex. The compound is bordered to the north by a substantial wall, against which nine rooms (so far) could be exposed. Two occupational phases have been verified but there are indications of a third. The suggested functions of the various structures of the most recent phase are: living, working, storage and administration spaces. The rich find contexts point to the production of textiles and metal objects, and the locally produced pottery is generally of a high quality. There are also many imports, mainly from the Mycenaean sphere of culture. The locally produced vessels from Phase 2 include the “Creature krater” which is a masterpiece of a high artistic standard. Another piece of elevated artistry is the piece of a “Warrior vase”.

Method development for the determination of textural properties of sugar beet roots

2019 ◽  
pp. 392-400 ◽  
Author(s):  
Gunnar Kleuker ◽  
Christa M. Hoffmann
Keyword(s):  
Sugar Beet ◽  
Compression Test ◽  
Storage Period ◽  
Textural Properties ◽  
Small Sample ◽  
Root Tip ◽  
Flexural Test ◽  
Sample Distribution ◽  
The Impact

The harvest of sugar beet leads to root tip breakage and surface damage through mechanical impacts, which increase storage losses. For the determination of textural properties of sugar beet roots with a texture analyzer a reliable method description is missing. This study aimed to evaluate the impact of washing, soil tare, storage period from washing until measurement, sample distribution and number of roots on puncture and compression measurements. For this purpose, in 2017 comprehensive tests were conducted with sugar beet roots grown in a greenhouse. In a second step these tests were carried out with different Beta varieties from a field trial, and in addition, a flexural test was included. Results show that the storage period after washing and the sample distribution had an influence on the puncture and compression strength. It is suggested to wash the roots by hand before the measurement and to determine the strength no later than 48 h after washing. For reliable and comparable results a radial distribution of measurement points around the widest circumference of the root is recommended for the puncture test. The sample position of the compression test had an influence on the compressive strength and therefore, needs to be clearly defined. For the puncture and the compression test it was possible to achieve stable results with a small sample size, but with increasing heterogeneity of the plant stand a higher number of roots is required. The flexural test showed a high variability and is, therefore, not recommended for the analysis of sugar beet textural properties.

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