Informal waste pickers in guayaquil: Recycling rates, environmental benefits, main barriers, and troubles

Improving urban waste management: A comprehensive study on household waste generation and spatial patterns in the Grand Guayaquil Metropolitan Area

This study tackles the growing global concern about municipal waste management, particularly in cities like the Grand Guayaquil Metropolitan Area (GGA). Through realistic field studies on in situ household waste generation and geographic information system (GIS) tools, this work offers a framework to predict the quantities and types of recyclable household waste for any metropolitan area in Latin America. Over 4 weeks, students collected, sorted and weighed recyclable waste types, including plastic, paper, metal, glass and fabric, from 776 sampled household of the GGA. ArcGIS survey tool identified household locations and allowed to survey different socio-demographic features. With the help of ArcGIS interpolation method, the total household waste generation for GGA was predicted, and the classification of the different types of recyclable waste was also spatially distributed for the study area. The report identified notable trends in plastic waste, specifically polyethylene terephthalate waste's steady prevalence and 42% growth rate, emphasizing the importance of enhanced recycling techniques. Spatial density maps showed a heterogeneous waste distribution across the GGA, emphasizing locations with higher waste output. This study demonstrates that improving recyclable waste collection can be accomplished with a moderately cheap expenditure by collaborating with academia to overcome knowledge gaps. This strategy provides opportunities to mitigate the environmental impacts of poor waste management.

In-depth analysis to develop a social marketing model to promote women's participation in waste segregation behaviour: A qualitative study

Waste separation is one of the key factors in managing solid waste and creating a healthy environment. Waste separation at source has always been associated with challenges. Therefore, this study was conducted to determine the perceptions of housewives and related parties regarding the factors that influence waste separation behaviour and to identify approaches to improve behaviour based on the social marketing framework. This study was conducted as a qualitative content analysis in Amol City in 2022. The data was collected through semi-structured individual interviews. A total of 25 housewives were selected as main participants and 5 stakeholders through purposive selection. The results of the study included lack of awareness of recyclable materials (product), personal, family and environmental barriers (price), lack of doorstep collection of dry waste (place), and lack of use of appropriate technology (promotion). The lack of financial resources, inappropriate political measures and the coronavirus pandemic were also the causes of this challenge. Most participants cited environmental and educational deficits as the main reason for not separating waste. It is possible to improve waste sorting behaviour at source through appropriate behavioural interventions at the individual, social and environmental levels. Researchers can use the results of this study to design, implement and evaluate waste segregation intervention programmes for housewives.

Role and limitations of the in-store waste collection system at supermarkets

In-store collection is defined as the activity of installing collection boxes at retail stores, such as supermarkets, for the collection of recyclables. The use of in-store collection reduces the burden of garbage collection in municipalities, which may reduce administrative and environmental burdens and costs. Previous discussions on in-store collection have ignored environmental impacts and the costs to consumers and that supermarkets should become players in the collection of recyclables. Therefore, it is necessary to clarify whether the use of in-store collection effectively contributes to a reduction in environmental burdens and costs for society. This study aimed to analyze the environmental burden and costs associated with integrating in-store collection into municipal solid waste (MSW) management systems. A total of 1734 municipalities in Japan were classified into six clusters using cluster analysis to analyze the characteristics of municipal and in-store collection by municipality. Model cities representing each cluster were created, and three scenarios were established to analyze the CO2 emissions and costs associated with municipal and in-store collection. The scenarios were cases where recyclables were collected through in-store collection (Scenario 1), recyclables were collected through municipal collection (Scenario 2), and both in-store collection and municipal collection were combined, similar to the current system (Scenario 3). The reduction in CO2 emissions in each model city in Scenario 1 was -37.0 to 53.5% compared to that in Scenario 3. There was a 0.90-1.96-fold increase in cost in Scenario 1 relative to Scenario 3. Suggestions for the appropriate implementation of in-store collection are proposed based on these results. For example, an increase in in-store collection reduces CO2 emissions but leads to an increase in costs. When integrating in-store collection into an MSW management system, reviewing the municipal collection system is necessary.