scholarly journals The Importance of the Microclimatic Conditions Inside and Outside of Plant Buildings in Odorants Emission at Municipal Waste Biogas Installations

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6463
Author(s):  
Marta Wiśniewska ◽  
Andrzej Kulig ◽  
Krystyna Lelicińska-Serafin
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Waste Treatment ◽  
Municipal Waste ◽  
Technological Line ◽  
Waste Storage ◽  
Significant Relationships ◽  
Pumping Stations ◽  
Biogas Plants ◽  
Microclimatic Conditions

Municipal waste biogas plants are an important element of waste treatment and energy policy. In this study, odorant concentrations and emissions were measured together with the air temperature (T) and relative humidity (RH) to confirm the hypothesis that the microclimatic conditions have an important impact on the level of odorant emission at municipal waste biogas plants. A simple correlation analysis was made to evaluate the strength and the direction of the relationship between the odorant concentration and emission and air temperature and relative humidity. The mean volatile organic compound (VOC) and NH3 concentrations vary depending on the stage of the technological line of the analysed municipal waste biogas plants and are in the following ranges, respectively: 0–38.64 ppm and 0–100 ppm. The odorant concentrations and emissions correlated statistically significantly with T primarily influences VOC concentrations and emissions while RH mainly affects NH3 concentrations and emissions. The strongest correlations were noted for the fermentation preparation section and for emissions from roof ventilators depending on the analysed plant. The smallest influence of microclimatic factors was observed at the beginning of the technological line—in the waste storage section and mechanical treatment hall. This is due to the greater impact of the type and quality of waste delivered the plants. The analysis of correlation between individual odorants showed significant relationships between VOCs and NH3 for most stages of the technological line of both biogas plants. In the case of technological sewage pumping stations, a significant relationship was also observed between VOCs and H2S. The obtained results may be helpful in preparing strategies to reduce the odours from waste treatment plants.

scholarly journals Odour Emissions of Municipal Waste Biogas Plants—Impact of Technological Factors, Air Temperature and Humidity

2020 ◽  
Vol 10 (3) ◽  
pp. 1093 ◽  
Author(s):  
Marta Wiśniewska ◽  
Andrzej Kulig ◽  
Krystyna Lelicińska-Serafin
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Municipal Waste ◽  
Ambient Conditions ◽  
Organic Fertiliser ◽  
Individual Measurement ◽  
Technological Factors ◽  
Biogas Plants ◽  
Odour Emissions ◽  
The Impact

Biogas plants processing municipal waste are an important part of a circular economy (energy generation from biogas and organic fertiliser production for the treatment of selectively collected biowaste). However, the technological processes taking place may be associated with odour nuisance. The paper presents the results of pilot research conducted at six municipal waste biogas plants in Poland. It shows the relations between odour intensity and concentration and the occurring meteorological and ambient conditions (air temperature and relative humidity) and technological factors at biogas plants processing municipal waste. The impact of meteorological and ambient conditions was identified by measuring air temperature and relative humidity and observing their changes. The impact of technological factors was identified by measuring odorant concentration (volatile organic compounds and ammonia) and observing their changes between individual measurement series. At most analysed biogas plants, the influence of technological factors on odour emissions took place and was clearly noted. The elements of biogas installations characterised by the highest concentration of these odorants were indicated. Special attention should be paid to the choice of technological solutions and technical and organisational measures to reduce the impact of unfavourable atmospheric conditions on odour emissions.

scholarly journals Odour Nuisance at Municipal Waste Biogas Plants and the Effect of Feedstock Modification on the Circular Economy—A Review

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6470
Author(s):  
Marta Wiśniewska ◽  
Andrzej Kulig ◽  
Krystyna Lelicińska-Serafin
Keyword(s):  
Literature Review ◽  
Circular Economy ◽  
Waste Treatment ◽  
Municipal Waste ◽  
Methane Fermentation ◽  
Waste Storage ◽  
Biogas Plants ◽  
The Subject ◽  
The Common ◽  
The Impact

The increase in the amount of municipal solid waste (MSW) generated, among other places, in households is a result of the growing population, economic development, as well as the urbanisation of areas with accompanying insufficiently effective measures to minimise waste generation. There are many methods for treating municipal waste, with the common goal of minimising environmental degradation and maximising resource recovery. Biodegradable waste, including selectively collected biowaste (BW), also plays an essential role in the concept of the circular economy (CE), which maximises the proportion of waste that can be returned to the system through organic recycling and energy recovery. Methane fermentation is a waste treatment process that is an excellent fit for the CE, both technically, economically, and environmentally. This study aims to analyse and evaluate the problem of odour nuisance in municipal waste biogas plants (MWBPs) and the impact of the feedstock (organic fraction of MSW-OFMSW and BW) on this nuisance in the context of CE assumptions. A literature review on the subject was carried out, including the results of our own studies, showing the odour nuisance and emissions from MWBPs processing both mixed MSW and selectively collected BW. The odour nuisance of MWBPs varies greatly. Odour problems should be considered regarding particular stages of the technological line. They are especially seen at the stages of waste storage, fermentation preparation, and digestate dewatering. At examined Polish MWBPs cod ranged from 4 to 78 ou/m3 for fermentation preparation and from 8 to 448 ou/m3 for digestate dewatering. The conclusions drawn from the literature review indicate both the difficulties and benefits that can be expected with the change in the operation of MWBPs because of the implementation of CE principles.

scholarly journals The Use of Chemical Sensors to Monitor Odour Emissions at Municipal Waste Biogas Plants

2021 ◽  
Vol 11 (9) ◽  
pp. 3916
Author(s):  
Marta Wiśniewska ◽  
Andrzej Kulig ◽  
Krystyna Lelicińska-Serafin
Keyword(s):  
Waste Treatment ◽  
Well Being ◽  
Municipal Waste ◽  
Quantitative Composition ◽  
Technological Processes ◽  
Odour Activity Value ◽  
Gas Detector ◽  
Biogas Plants ◽  
Odour Emissions

Municipal waste treatment plants are an important element of the urban area infrastructure, but also, they are a potential source of odour nuisance. Odour impact from municipal waste processing plants raises social concerns regarding the well-being of employees operating the plants and residents of nearby areas. Chemical methods involve the determination of the quantitative composition of compounds comprising odour. These methods are less costly than olfactometry, and their efficiency is not dependent on human response. The relationship between the concentration of a single odorant and its odour threshold (OT) is determined by the odour activity value (OAV) parameter. The research involved the application of a multi-gas detector, MultiRae Pro. Measurements by means of the device were conducted at three municipal waste biogas plants located in Poland. In this paper we describe the results obtained when using a detector during the technological processes, the unitary procedures conducted at the plants, and the technological regime. The determination of these relationships could be useful in the development of odour nuisance minimization procedures at treatment plants and the adjustment to them. This is of paramount importance from the viewpoint of the safety and hygiene of the employees operating the installations and the comfort of residents in the areas surrounding biogas plants. Monitoring of expressed odorant emissions allows the course of technological processes and conducted unit operations to be controlled.

scholarly journals The Impact of Technological Processes on Odorant Emissions at Municipal Waste Biogas Plants

2020 ◽  
Vol 12 (13) ◽  
pp. 5457
Author(s):  
Marta Wiśniewska ◽  
Andrzej Kulig ◽  
Krystyna Lelicińska-Serafin
Keyword(s):  
Waste Treatment ◽  
Municipal Waste ◽  
Technological Processes ◽  
Biological Part ◽  
Gas Detector ◽  
Processing Plants ◽  
Biogas Plants ◽  
Odour Emissions ◽  
The One ◽  
The Impact

Municipal waste treatment is inherently associated with odour emissions. The compounds characteristic of the processes used for this purpose, and at the same time causing a negative olfactory sensation, are organic and inorganic sulphur and nitrogen compounds. The tests were carried out at the waste management plant, which in the biological part, uses the methane fermentation process and is also equipped with an installation for the collection, treatment, and energetic use of biogas. The tests include measurements of the four odorant concentrations and emissions, i.e., volatile organic compounds (VOCs), ammonia (NH3), hydrogen sulphide (H2S), and methanethiol (CH3SH). Measurements were made using a MultiRae Pro portable gas detector sensor. The tests were carried out in ten series for twenty measurement points in each series. The results show a significant impact of technological processes on odorant emissions. The types of waste going to the plant are also important in shaping this emission. On the one hand, it relates to the waste collection system and, on the other hand, the season of year. In addition, it has been proved that the detector used during the research is a valuable tool enabling the control of technological processes in municipal waste processing plants.

scholarly journals The effect of the design of housing systems for calves on the microclimatic conditions of the rearing environment

2013 ◽  
Vol 56 (1) ◽  
pp. 509-517 ◽  
Author(s):  
D. Němečková ◽  
I. Knížková ◽  
P. Kunc ◽  
L. Stádník
Keyword(s):  
Relative Humidity ◽  
Thermal Comfort ◽  
Air Temperature ◽  
Rectal Temperature ◽  
Housing System ◽  
Air Humidity ◽  
Housing Systems ◽  
Relative Air Humidity ◽  
Microclimatic Conditions ◽  
Calf Rearing

Abstract. The objective of this study was to compare microclimatic conditions in three different housing systems designed for calf rearing – individual wooden hutches, individual tarpaulin hutches and individual pens under shelter – and to evaluate the thermal comfort of calves reared in these systems. Air temperature, relative air humidity and the rectal temperature of calves (n=324) were measured in the hutches and pens during three consecutive years. The hypothesis that the climatic conditions of different housing system designs used in calf rearing affect the thermal comfort of calves was confirmed, as the design of the individual housing systems affected microclimatic conditions and subsequently the rectal temperature of the housed calves as well. Statistically significant differences (P<0.05) were found between the shelter and individual outdoor calf hutches in relation to the measured parameters. In the summer, the shelter showed a significantly (P<0.05) lower air temperature and significantly higher level of both relative air humidity and calf rectal temperature. These significantly higher rectal temperatures in both summer and in transitional periods (from March to June and from September to December) can be explained by microclimatic conditions and specifically by the combination of air temperature and the highest relative humidity that caused less comfortable microclimatic conditions for calves. The high relative humidity is probably caused by inadequate ventilation under the shelter. Therefore, new technology of calf housing under shelter could be recommended as suitable housing only if adequate ventilation is provided.

scholarly journals Using the MultiRAEPro Gas Detector to Monitor Odour Emissions from Biogas Plants Processing Municipal Waste

Proceedings ◽  
2019 ◽  
Vol 16 (1) ◽  
pp. 42
Author(s):  
Marta Wiśniewska
Keyword(s):  
Waste Treatment ◽  
Treatment Plant ◽  
Municipal Waste ◽  
Study Results ◽  
Gas Detector ◽  
Biogas Plants ◽  
Waste Treatment Plant ◽  
Odour Emissions ◽  
Biological Waste Treatment

The aim of this study was to analyse the work of the MultiRAEPro gas detector in terms of its application in monitoring odour emissions from biogas plants processing municipal waste constituting part of a mechanical–biological waste treatment plant. The obtained results provided the basis for formulating conclusions concerning the use of a gas detector in monitoring odour emissions from biogas plants processing municipal waste. The study results can be applied in practice in biogas plants processing municipal waste as well as in other municipal facilities.

scholarly journals Microclimatic Performance of Courtyards in Residential Buildings in Kafanchan-Nigeria

2017 ◽  
Vol 4 (3) ◽  
Author(s):  
Markus Bulus ◽  
Malsiah Hamid ◽  
Yaik Wah Lim
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Architectural Design ◽  
Residential Buildings ◽  
Experimental Methodology ◽  
Weather Data ◽  
Data Loggers ◽  
Outdoor Area ◽  
Microclimatic Conditions ◽  
Definite Difference

Recent studies have emphasized the importance of the courtyard microclimate to the building and the need for a comparative study on their typology in other to ascertain the best alternative. Also emphasizing that the architect choice of the courtyard typology to be adopted in his architectural design schemes should be based on performance rather than his mere intuitive choice. Therefore, an investigational study of two different courtyard forms with the same perimeter, and material finished -the fully enclosed internal central courtyard and the semi-enclosed courtyard has been carried out in two existing residential buildings, in the city of Kafanchan-Nigeria. The main purpose of the study is to compare their climatic performances in other to ascertain the best option. The study employed the experimental methodology. Three Hobo Weather Data Loggers (HWDL) were used to collect data in the courtyards, and the third one was positioned in the outdoor area as a benchmark. Only two climatic variables, namely air temperature, and relative humidity were examined as these variables have not been investigated in a single research on the courtyard in Nigeria. The results showed a definite difference in the microclimatic conditions of the two courtyards. The fully enclosed internal courtyard is seen to have a better air temperature difference of 1oc to 3oc at the time intervals, and the relative humidity difference of 1% to 6%. In conclusion, the fully enclosed internal courtyard has demonstrated a more favorable microclimatic performance than the semi-enclosed, and future simulation studies towards its optimization are recommended.

scholarly journals Detrended Multiple Cross-Correlation Coefficient applied to solar radiation, air temperature and relative humidity

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Andrea de Almeida Brito ◽  
Heráclio Alves de Araújo ◽  
Gilney Figueira Zebende
Keyword(s):  
Relative Humidity ◽  
Solar Radiation ◽  
Solar Energy ◽  
Correlation Coefficient ◽  
Air Temperature ◽  
Cross Correlation ◽  
Global Solar Radiation ◽  
Meteorological Variables ◽  
Hourly Data ◽  
Cross Correlations

AbstractDue to the importance of generating energy sustainably, with the Sun being a large solar power plant for the Earth, we study the cross-correlations between the main meteorological variables (global solar radiation, air temperature, and relative air humidity) from a global cross-correlation perspective to efficiently capture solar energy. This is done initially between pairs of these variables, with the Detrended Cross-Correlation Coefficient, ρDCCA, and subsequently with the recently developed Multiple Detrended Cross-Correlation Coefficient, $${\boldsymbol{DM}}{{\boldsymbol{C}}}_{{\bf{x}}}^{{\bf{2}}}$$DMCx2. We use the hourly data from three meteorological stations of the Brazilian Institute of Meteorology located in the state of Bahia (Brazil). Initially, with the original data, we set up a color map for each variable to show the time dynamics. After, ρDCCA was calculated, thus obtaining a positive value between the global solar radiation and air temperature, and a negative value between the global solar radiation and air relative humidity, for all time scales. Finally, for the first time, was applied $${\boldsymbol{DM}}{{\boldsymbol{C}}}_{{\bf{x}}}^{{\bf{2}}}$$DMCx2 to analyze cross-correlations between three meteorological variables at the same time. On taking the global radiation as the dependent variable, and assuming that $${\boldsymbol{DM}}{{\boldsymbol{C}}}_{{\bf{x}}}^{{\bf{2}}}={\bf{1}}$$DMCx2=1 (which varies from 0 to 1) is the ideal value for the capture of solar energy, our analysis finds some patterns (differences) involving these meteorological stations with a high intensity of annual solar radiation.

scholarly journals Hazards associated with municipal waste storage Vol. II

2018 ◽  
Vol 247 ◽  
pp. 00033 ◽  
Author(s):  
Anna Dmochowska
Keyword(s):  
Heavy Metals ◽  
Gas Exchange ◽  
Allergic Diseases ◽  
Municipal Waste ◽  
Larynx Cancer ◽  
Pathogenic Agent ◽  
Waste Storage ◽  
Mucous Membranes ◽  
Upper Respiratory ◽  
Suspended Dust

Municipal waste storage leads to many threats to all elements of the environment. Among other things, are suspended dusts. Before closing the plot designated for storing a given portion of waste, the unprotected volatile parts contained in it are emitted, including dusts. They can be a serious pathogenic agent, transferring microtoxins, heavy metals and other pollutants. Depending on the size, they settle on the walls of the alveoli, making gas exchange difficult, causing irritation to the epidermis and mucous membranes, inflammation of the upper respiratory tracts and cause allergic diseases such as asthma. They can also cause lung, throat and larynx cancer. The aim of the research was to measure the concentration of suspended dust in the areas adjacent to the landfill. The DustTrak II dust meter was used for the tests. Dust concentrations measurements were made for orientation purposes (to plan measurements in subsequent years). The obtained results indicate that the permissible dust concentrations are exceeded even though the landfill is already closed, and the landfill top and side escarpments were being reclamation.

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