Laboratory studies of the coagulation process of waste waters of milk processing enterprises by changing the mixing rate
Journal Title: Технологический аудит и резервы производства - Year 2018, Vol 1, Issue 3
Abstract
<p><em>The object of research is the process of mixing the coagulant with the waste water of the milk processing industry by means of a stirrer at different speeds of rotation. In case of incomplete mixing, there is a local lack of concentration of the reagent or vice versa local overdose, which leads to a poor quality of the purification process. Therefore, the definition of mixing parameters is one of the most important tasks.</em></p><p><em>The following instruments and materials were used for carrying out experimental studies:</em></p><p><em>– sample of sewage – 5 liters;</em></p><p><em>– 3 % solution of ferric chloride FeCl<sub>3</sub>;</em></p><p><em>– stirring devices (electromagnetic stirrer MS-H280-Pro, Poland);</em></p><p><em>– device for determining the comparative characteristics of water turbidity (spectrophotometer DR 1900, USA).</em></p><p><em>The order of the study: the total sample of model sewage was divided into several portions of 150 ml each (2 series of experiments in 5 portions). After processing a portion of the model runoff with reagents and stirring with a magnetic stirrer, the light absorption coefficient was determined on a spectrophotometer after 60 minutes for sedimentation. Based on the obtained results, the light absorption coefficient was plotted against the mixing rate.</em></p><p><em>Based on the results of the experiments, graphical and mathematical dependences of the change in the light absorption coefficient on the intensity of mixing were obtained. The character of the obtained curves indicates that at a rotational speed of the mixer of 100–800 rpm, the purification efficiency was 79.7 %, and at a rotational speed of 800–1500 rpm – 89.1 %.</em></p><p><em>The carried out researches have shown expediency of definition of mixing modes of coagulant with processed waste water for maintenance of optimum mixing parameters in mixing devices. This will allow for more complete use of the coagulant capacity of the reagents, complete and rapid mixing with the waste liquid. This will ultimately lead to cost savings for reagents and to optimize the operation of the whole technological scheme for wastewater treatment of milk processing enterprises.</em></p>
Authors and Affiliations
Andrii Shevchenko, Tamara Shevchenko, Oleg Pinchuk, Sergiy Kunytskyi, Oleksii Miasoiedov
Keywords
Related Articles
- EP ID EP527310
- DOI 10.15587/2312-8372.2018.121763
- Views 126
- Downloads 0
Formation of HR (human resources) business strategy based on SPACE analysis
<p><em>The object of research is the process of making strategic personnel decisions at the enterprise. Since the personnel of the enterprise are its main strategic resource in the competitive struggle, the research of a...
Correction of technological characteristics of protein-fat mixture by expanding the component composition
<p><em>The object of research is the technological characteristics of the protein-fat mixture of increased nutritional value, depending on the addition of vegetable oil as a component. The protein-fat mixture is a mixtur...
Formation of system frameworks of energy controlling
<p><em>The object of research is the controlling concept and its application in the energy sector of the enterprise. Controlling concept opens wide perspectives and provides economic instruments to raise effectiveness an...
Community analysis as socio-economic system: space-territorial nature, functions and features
<p><em>The object of research is society as a socio-economic system, its spatial-territorial nature, functions and characteristics. One of the most problematic places is that often there is inconsistency and lagging of t...
Minimization of conjunctive normal forms of boolean functions by combinatorial method
<p class="SA"><em>The object of research is the combinatorial method of minimizing conjunctive normal forms (CNF) of Boolean functions in order to reduce its algorithmic complexity. One of the most places to minimize CNF...