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[Display omitted] • Characterization of MIBA from 3 MSWI plants in Delhi to assess disposal or reuse. • Compilation of 50 studies on MIBA leaching to identify CoCs critical to fate of MIBA. • Comparative assessment of CoCs to evaluate variability across countries. • Emphasis on mandatory inclusion of the identified CoCs in future studies. Present study characterizes municipal solid waste incineration bottom ash (MIBA) from three incineration plants in Delhi with an intent to serve the dual objectives: a) assessing the disposal/reuse options for Delhi MIBA, b) evaluating variability in results across the countries (including India) and assessing if is significant enough to influence the fate of MIBA of varied origin. A review on leaching studies of MIBA (50 research papers) was conducted which aided in achieving both the objectives. Delhi MIBA samples were analysed for chemical composition. The two commonly adopted leaching tests i.e., TCLP and EN 12457–2, were conducted and the results were checked against regulatory threshold levels (RTLs) to achieve the first objective. Leaching concentration of the contaminants was compared with the compiled literature and RTLs to accomplish the second objective. The compendium of literature most importantly revealed the physicochemical parameters which are pivotal in determining the fate of MIBA but have been missing from many studies. Ten such parameters were identified: Cr, Cu, Mo, Sb, Cl - , SO 4 2- , Cd, Pb, Ni and Zn and are referred as contaminants of concern (CoCs). Delhi MIBA was found suitable for disposal to non-hazardous waste landfills and unsuitable for unrestricted reuse. CoCs identified in Delhi MIBA were identical to those observed in literature (except Cd, Pb and Zn). The variability in leaching concentration of CoCs, observed from comparative assessment of results, spanned nearly 2 to 3 log 10 magnitudes for Cu, Cr, Pb, Sb and Zn while 1 to 2 log 10 magnitudes for Mo, Cl - and SO 4 2-. [ABSTRACT FROM AUTHOR]

Purpose - The purpose of this study is to assess the current practices and state of solid waste management systems (SWMS) in one medium-sized Indian town, identifying main issues and problems to its ineffectiveness, inefficiency and to gain some suggestions and recommendations to improve the SWM infrastructure and practices in such Indian towns. Design/methodology/approach - A medium size city, Aligarh, having a population of about 0.7 million and situated 130 km from the capital city of India, Delhi, was selected for this study. An extensive literature review was conducted to establish a theoretical framework. Field visits were conducted to collect the primary data and to understand the SWMS of the city, including interaction and interviews with the various officials and workers of the municipality responsible for SWM and residents of the city. A protocol was developed to analyze the sources, quantification, and to determine the composition of waste streams. Existing reports related to SWM and recommendations of planners/NGOs/consultants for improving the system were studied. Findings - Despite all efforts being made by the local municipality within their limited resources, the solid waste management situation in Aligarh is still not adequate. The waste is being dumped on low lying or open areas in the outskirts of the city without engineering and scientific methods. This situation of SWMS can be compared with other Indian towns of similar size. Originality/value - The paper discusses problems, opportunities and perspectives in the existing solid waste management system in Aligarh city and assesses the potential for its improvement. [ABSTRACT FROM AUTHOR]

The conventional methods of waste disposal, namely landfill and recycling, are associated with environmental and economic inefficiencies. The associated policies and regulations are also found to be inadequate in relation to the current situation. The situation of plastic handling-related policies in India was reviewed in this regard. Alternative techniques such as liquefaction, biological treatment, pyrolysis and incorporation of plastics in road laying have received increased attention in recent years. This paper reviews the fundamentals of each process and offers a clear picture of plastic generation and disposal. The present review also focuses on the benefits and drawbacks of different disposal methods by comparing the methods over several economic, environmental and energy parameters. A comprehensive Energy, Economy and Environmental index (EEE index) has been developed in this study to compare the different methods and reconcile the various parameters based on which the comparison was performed. Incorporation of plastic waste in concrete structures and road pavements were found to be the best methods of plastic waste disposal, with an EEE index score of 42.85%. These two methods were followed by pyrolysis and liquefaction of waste plastic with scores of 23.08% each. Landfill, with an EEE index of −7.14%, was found to be the least holistic method of waste disposal and needs to be minimized wherever possible. [ABSTRACT FROM AUTHOR]

A comprehensive case study of Mumbai (Bombay), India was undertaken to investigate the economic, social and environmental impact of international trade of waste paper for recycling purposes between industrialized and developing countries. Analysis of a Western approach vis-a-vis informal policy for waste paper recovery concludes that employment is maximum under informal policy measure and public response playsan important role in maintaining environmental quality. The study further shows that income inequality is more under informal policy, andwithout policy public cost will increase continuously in the future.The net present value of the informal policy is found to be higher than that for the formal policy. Econometric study on input substitution in the Indian paper industry suggests limited substitution possibilities between domestic and imported waste paper. Results from a static material balance flow model indicate that environmental impacts are less with increased trade and economically the paper sector in India benefits from free trade. Based upon the results of the study, somepolicy recommendations have been made that may enhance the efficiency of waste paper recycling in India. [ABSTRACT FROM AUTHOR]