The case study investigates the behaviors of the residents on a Greek Island in the Aegean Sea, where there is a sanitary landfill and disposal is the main solid waste treatment method implemented. With the use of hierarchical log-linear analysis certain correlations were examined including the citizens' quality of life, the performance of waste collection system, the location and allocation of waste containers, the cleanliness services provided, environmental consciousness in everyday life, awareness level on recycling and general waste management issues.
Municipal solid waste management (MSM) has been proven to be one of the pivotal
challenges for modern societies resulting from the increasing global population and
urbanization [
The aim of this paper is to analyze the residents’ behaviors and attitudes concerning the operation effectiveness of the municipal solid waste management on Samos island, where the only MSM infrastructure is a sanitary landfill. 2
The study area was the Island of Samos in the Eastern Aegean Sea in Greece. Administratively, Samos belongs in the Region of North Aegean and at the Regional Unit of Samos. In the island there are two municipalities and a sanitary landfill in the area of Kamara, in the east part of the island.
Simple random sampling was used due to its simplicity, since it requires the least
possible knowledge of the population compared to other methods [
Hierarchical Log-linear Analysis was used to examine two groups of variables.
Prior to the application of Hierarchical Log-linear analysis, the expected frequencies
in the contingency table were examined [
The residents of Samos state to be satisfied in a percentage of 39.5%, 17.8% very satisfied and 6% absolutely satisfied with the quality of live provided in the island they live; while, less satisfied are the 26.8% and not at all satisfied the 10%.
Slightly more negative rates are also observed for the satisfaction they have with the cleanliness services provided. In particular, 37.8% reckon to be less satisfied, 36% satisfied, 12.5% not at all satisfied, 12.3% very satisfied and 1.5% absolutely satisfied. According to recent findings [10; 11; 12] waste management plays a crucial role for the society as it closely affiliated with the citizens’ quality of life.
Addressing the frequency of the waste collection system 45% of residents claim
that they are satisfied, 33% are less satisfied, 13.8% are very satisfied, 5.8% are not at
all satisfied and 2.5% are absolutely satisfied. More specifically, concerning the
emptying of the waste containers on a weekly basis, the 9% of the residents notice that
it takes place once a week, the 20.8% twice, the 26.2% three times, the 14.5% four
times, the 15% five times, the 10% six times, and the 4.2% every day; the 0.3% did
not answer this question. It should be noted that there is a positive correlation between
the generated waste and the popularity of the streets, which in turn requires the proper
selective collection nodes respectively [
The frequency of routes for the waste collection is related to the number of the
existing waste containers [
The fact that the containers are under a constant change of position proves that the residents are annoyed by their presence. Indeed the 21.3% affirms that it is true while the 78.8% disprove this fact.
The placement of disinfecting clean waste containers for proper hygiene outputs and foot operated opening mechanism by means of a pedal that ensures that the lid lifts automatically, are two features that tend to make the presence of containers more acceptable by the residents. In the case study it seems that the maintenance of the waste containers is satisfactory in Samos, yet, a low percentage of 6% residents claim to dispose their waste out of the waste containers when they are filled. It should be noted that most of them (94%) place their waste inside the containers. Unfortunately, an important percentage (25.5%) declare that they have unconsciously dispose waste on the street, while the 74.5% of the residents has never adopted this attitude.
Prior to the initiation of the log-linear analysis (in particular the hierarchical), it is intentional to examine the size of the expected frequencies in the crossing table. Is it therefore observed that the only anticipated frequency lower than 5 is 3.4. Therefore, no anticipated frequency is lower than 1 and only one is lower than 5; hence, there exists no problem with low anticipated frequencies. We further observe that there is a disparity between the observed and the anticipated frequencies. This means that the assumption of full independency between these three criteria is incorrect. Through the application of Hierarchical Log-linear analysis, in both cases (municipalities) after the removal of the third-class degree of correlation, it was established that the most appropriate model was the one which included the impact and the interaction of the variables divided by two.
Hierarchical Log-linear analysis was implemented for the variables “provision of cleanliness services”, “distance between the residents’ households and the waste containers”, “waste containers emptying” and “waste containers change of position”. There was no interaction per 4 ή 3 criteria, because the X2 for Pearson’s test is 4.624 with probability (p) = 0.593 and because the X2 likelihood ratio is 4.816 with probability (p)= 0.588. The representations are the following: • Residents that are absolutely satisfied to satisfied with the cleanliness services provided report that the waste containers are emptied four to seven times a week.
On the other hand, those who are not at all or less satisfied with the cleanliness services provided claim that the waste containers are emptied from one to three times a week (Table 1).
Residents who declare that their home is within 50 meters of the waste containers report that the waste containers are emptied four to seven times a week. On the other hand, those who state that their home is more than 50 meters away from the waste containers affirm that their containers are emptied one to three times a week (Table 2).
Residents who state that they are absolutely satisfied to satisfied with the cleanliness services provided report that their home is within 50 meters of the waste containers. While, those who say they are not at all satisfied with the cleanliness services provided say that their home is farther than 50 meters away from the waste containers (Table 3).
Residents who are absolutely satisfied to satisfied with the cleanliness services provided state that the waste containers are not often moved. Whereas, those who are not at all or less satisfied with the cleaning services provided reckon that the containers are often moved (Table 4).
Residents who report that their home is within 50 meters far of the waste containers regard that the containers are not often moved. On the contrary, the ones report that their residence is farther than 50 meters away from the containers, state that the waste containers are often moved (Table 5). 0 - 50 meters
One practical solution towards effective waste management is the prompt emptying
of the filled waste containers. Added to that, the less time the waste remains on the
waste containers the less disturbances will appear in the close area such as unpleasant
odors and hygiene matters. To this end, it would be useful for the citizens to dispose
their waste just before they are collected [
Another important issue for the residents of Samos is that there is insufficient awareness on waste management. 46.3% are said to be less informed, 24% not at all informed, 20.3% informed, 6.5% very informed and 3% absolutely informed. Thus, only 15% of the residents are aware of the cleanliness regulation when the 85% of them are unaware of its content.
However, it seems that they are better informed about recycling; 37% claims to be less informed, 30.5% informed, 14.3% not at all informed, 12.8% very informed and 5.5% absolutely informed. Indeed, 97% of citizens consider that the products they use (paper, aluminium, glass, etc.) should be recycled.
Nevertheless, they also share the opinion that waste management is a procedure that includes costs for them. Namely, the municipal fee they have to pay for waste management in Samos is regarded as neutral for the 42.3%, high for the 35.8%, very high for the 16.5% while the 5% and the 0.5% consider this cost as low and very low respectively.
Hierarchical Log-linear analysis was applied for the variables “Provision of cleanliness services”, “unconsciously disposal of waste on the street”, “cost of the municipal fee for waste management” and sex. Therefore, there was no interaction per 4 or 3 criteria, because the X2 for Pearson’s test is 10.567 with probability (p) = 0.307 and because the X2 likelihood ratio is 11.404 with probability (p)= 0.249. The representations are the following: • Residents who regard they are absolutely satisfied with the provided cleanliness services state that the cost of municipal fees is neutral to very low. On the contrary, those who consider they are not at all or less satisfied with the provided cleanliness services claim that the cost of municipal fees is high and very high (Table 6). • absolutely satisfied /
satisfied cost of municipal fees very high - neutral - very Total
high low
Count 80 119 199 Expected count 104.0 95.0 199.0
Residual -24.0 24.0
Count 129 72 201 lessasti-snfoietdat all Expected count 105.0 96.0 201.0
Residual 24.0 -24.0
Total ExpeCctoeudnctount 220099.0 119911.0 440000.0 The residents that have noticed that unconsciously dispose waste on the street are males while the ones that have not found themselves dispose waste on the street are females (Table 7). Τable 8. Demographic features of the respondents
18-30 25.3% Marital status
without children
48.8% Educational level Profession male 40.0%
According to the demographic characteristics of the questioned, a major part was consisted of women (60%), while most of them were allocate to the total of age categories, half of them are married while the half of them have two or no children (25.5%), they are well educated mostly employed in the public and private sector. Finally, almost four out of ten of the residents (33.8%) are satisfied with the incomes; while the, 33% claim to be less, 23% not at all, the 7.8% and the 2.5% as very and absolutely satisfied with their incomes, respectively (Table 8). 4
The residents of Samos claim to be satisfied with their quality of life, whereas they assess the cleanliness service and the frequency of the waste collection system in a negative point of view. On the other hand, the residents who are more satisfied with the cleanliness services report that the waste containers are being emptied more frequently (4-7 times a week), they are located in the close area of their residence (up to 50 meters) and they are not being moved by other residents. The latest leads to the conception that when services are of better quality, they receive better acceptance by the residents they address. In addition, and according to the residents’ views there is an association between the acceptance of better services with the lower fee they have to pay at the municipality for the waste management system. Another important conclusion drawn by the results was that males tend to unconsciously dispose their waste on the street more frequently.
As regards the information that residents receive about waste management it is said to be unsatisfactory, while there is a better notion on recycling raising awareness issues. Accordingly, the residents’ knowledge of the cleanliness regulation is regarded as inadequate when at the same time their acceptance of recycling is something established. Eventually, it is clear from the abovementioned that raising awareness addressing the residents of Samos, should be examined and further extended on the general framework of waste management schemes.