carbon dioxide

Synergistic Effect of Ultrasound Cavitation and Gas in the Water Disinfection

The paper considers water purification processes from Bacillus bacteria type under the conditions of gases bubbling only (argon, helium, oxygen, and carbon dioxide), cavitation and combined action of gas and cavitation. The synergistic effect was found under conditions of simultaneous action of gas and cavitation (kd(gas/US ) >kd(gas) + kd(US) almost double) and it was shown that kd(gas/US) >kd(gas) by almost an order of magnitude. Relative series of effective destruction of microbial cells was established: Ar/US > О2/US >Не/US > СО2/US.

CARBON SEQUESTRATION IN THE OCEAN-AN ESCAPE ROUTE

The utilization of fossil fuels is releasing previously carbon stored in the various carbon pools of the earth and increasing the global concentration of Carbon dioxide from an initial 280 parts per million in the 1850s to above 400 parts per million today. This review takes a look at previous works on carbon sequestration; its feasibility, potential and process. Increased carbon emission has disrupted the fragile balance in carbon content between the atmosphere and ocean which took thousands of years to attain.

Weather station for monitoring the microclimate in the room on Arduino platform

In this project was shown approaches to the implementation of a weather station for monitoring the microclimate in the room on Arduino platform. Considered a platform for project development and software environment. The virtual scheme of the weather station is modeled. The main functions of the components are described and their connection to the microcontroller is shown. The process of firmware of the microcontroller is considered. The algorithm of system operation is described. A functional electrical diagram were also constructed.

APPLICATION OF ROOM RECUPERATORS FOR VENTILATION OF SCHOOL APARTMENTS

Maintaining the proper parameters of the microclimate in classrooms and classrooms to ensure the well-being of students is an important social task, since young people spend a significant part of their time in educational institutions. Failure to admit microclimate parameters in class rooms, in particular due to the high concentration of CO2, leads to deterioration of the state of health and disability of the students, as well as to the inadequate absorption of the training material.

EVALUATING THE STATE OF SANITARY AND HYGIENIC CONDITIONS IN VENTILATED ROOMS

At present, the problem of energy efficiency remains extremely important. Modern building technologies allow you to create houses with the minimum power consumption, using energy efficient external protections, including plastic windows. This leads to a reduction in the heat loss of the room, but there is a danger of reducing the required air exchange.

INDICATORS OF ENERGY EFFICIENCY OF MULTICOMFORT HOUSES

The article analyzes the problem of carbon dioxide emissions in the construction industry and calculates the energy efficiency of an multicomfort house. The potential for energy savings and CO2 emission reductions remains largely untapped due to the removal of technologies from new construction, the lack of effective environmental policies and insignificant investments in energy efficient buildings.

DETERMINATION OF CARBON DIOXIDE CONCENTRATION IN CLASSES

In the last decade, modernization of school buildings in Ukraine is being carried out. Thermorenoval measures such as thermal insulation of exterior walls and replacement of existing windows are most often used. Installing hermetic metal-plastic windows significantly reduces the heat loss of premises, but leads to disturbance of air regime, as outdoor air infiltration is often the only source of external fresh air supply.

MONITORING OF INDOOR AIR IN A PASSENGER RAILWAY WAGONS

In low-energy and passive houses, about 80 % of the total energy is consumed for fresh air heating or cooling, the reason being the improved thermal insulation and air tightness of such a building. In fact, actual trend of building construction is to keep the windows closed. A similar situation is already encountered in some means of transportation, i. e. air-conditioned trains. Ventilation of the passenger space is assured mainly by a mechanical ventilation and, when the train stops, by a natural ventilation through door opening.

ANALYSIS OF THE VENTILATION AIR FLOW RATE FOR RENEWAL OF WINDOWS

Replacement of old wooden windows in a new plastic windows, in the old buildings, we achieve the massive reducing heat loss of the building. New windows are characterized by better tightness. The question is, how much more are reduce the uncontrolled ventilation. In the article is presented the experimental measurement indoor air quality in the room in two phases. In the first phase is in the room installed 55 year old wood window. In the second phase is in the same room installed new plastic window.

Effect of sulphur compounds on cultivation process of microalgae chlorella vulgaris

The article deals with the investigation of the influence of sulfur compounds concentration on the cultivation of microalgae Chlorella vulgaris for the purpose of future use of flue gases as a nutrient source. The alteration of culture medium pH and microalgae biomass production under simultaneous injection of CO2 and H2SO4 or Na2SO3 are studied. It is shown that the enhancement of sulphur concentration to 0.44 g/L by using Na2SO3 increases the biomass growth by 15 percent and does not cause deviations from the optimal pH range.