Towards Sustainable Waste Management through Cautious Design of Environmental Taxes: The Case of Ethiopia

This research examines the viability of the design of environmental taxes in the achievement of sustainable waste management in the Addis Ababa Administration (AAA) of Ethiopia. It has employed an empirical qualitative method. It first shows the mutual contribution of the achievement of waste management to the progress of sustainable sanitation and water resource management. Secondly, it displays the distributive and incentive roles of environmental taxes in the achievement of sustainable waste management. Thirdly, it indicates that a cautious design of the source, base, scope and rate of environmental taxes is a critical determinant for environmental taxes’ overall success in addressing the prevalent waste mismanagement in Ethiopia. Fourthly, it demonstrates that in the AAA: (1) The sources of solid waste collection, landfill, sewerage service and effluent charges are subject to the principle of legality; (2) the scope of solid waste collection, landfill, sewerage service and effluent charges is appropriate; (3) while the base of sewerage service and effluent charges is efficient, the base of solid waste and landfill charges is not at all efficient; and (4) while the rates of solid waste, landfill and sewerage service charges are slightly optimal, the rate of the effluent charge has not yet developed. Fifthly, it reveals that, having a somewhat viable design, solid waste, landfill and sewerage service charges are marginally reinforcing the aspiration of Ethiopia to achieve sustainable sanitation. Sixthly, it uncovers that because Ethiopia has not yet developed the rate of effluent charge, effluent charge is neither internalizing the cost of water resource degradation nor incentivizing sustainable water resource management. Finally, it implies that the aspiration of Ethiopia to achieve sustainable sanitation and water resource management by 2030 is contingent on the cautious design of its waste management taxes.

Effluent charge reform for controlling water pollution in the Malaysian crude palm oil industry

This study analyzes the costs borne by Malaysian palm oil mills (POMs) in order to reach standard levels. A number of studies have been conducted on Malaysian palm oil mills; however, none has obtained the marginal abatement cost (MAC) through an estimated total cost function. More particularly, as far as inflation is concerned, the effluent-related fee and effluent charge specified have not been revised within the past two decades. In addition, to our knowledge, there has not been any study comparing MAC to the mills of the two different methods of disposal, namely watercourse and on land. Our results show that, to force POMs to meet the standard, the effluent charge must be set higher, equaling the MAC. While the results show the existence of economies of scale in abatement activity, setting the effluent-related fee equal to the MAC may encourage mills to further abate their water pollution.

Analysis of effluent charge for wastewater treatment plants in industrial districts

Three cost functions of wastewater treatment plants in industrial districts were analyzed and discussed. From the results, the effluent charge rate can be proposed in order to internalize parts of the external cost of wastewater pollution. The charge base of the effluent charge shall be the total pollutant amounts in the effluent. The charge rate shall be set up according to the results of cost functions for various treatment efficiencies. The marginal cost of NT$790 (US$30.4) per noxiousness unit (F=1,000 m3/day, Q=5,000 noxiousness units/year, treatment efficiency = 90%) was recommended to be the initial charge rate. This cost should be updated regularly and the charge rate should be raised according annually.