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Purpose. The purpose of this paper is to substantiate the technological solution of equilibrium conditions in the system "methane – water phase – hydrate – R-2M"; to reveal existing ecological problems of methane gas hydrate extraction from the Black Sea bottom; to determine whether gas hydrate deposits of Black Sea methane are an ecological problem or should be considered as an energy source, to explain the necessity of introduction of the effect of forced self-preservation of methane gas hydrates into development of gas hydrates from the sea bottom.
Results. This article analyses current research on gas hydrates specifically in the Black Sea. It shows that the necessary conditions exist for the accumulation of gas hydrates in certain areas of the deep Black Sea (one of the most favourable regions among modern sea basins). This article discusses some ideas for the development of experimental studies of the metastable state of methane gas hydrates at negative temperatures: stability and mechanisms of decomposition. Despite the great variety of technological solutions and schemes of gas hydrates application proposed by the leading researchers in the world, they have been tested practically on a small number of laboratory and model installations, mainly for water desalination and concentration of water solutions, separation of two-component gas mixtures. In fact, there is no data to calculate the processes of formation and melting of ice-gas hydrate methane. The effect of self-preservation of methane gas hydrates deserves special attention.
Scientific novelty. An attempt was made to substantiate the issue of whether gas hydrate deposits of methane in the Black Sea are an environmental problem or should they be considered as an additional source of energy and even as a "fuel of the future". The authors for the first time introduced the concept of "forced preservation (activation) effect of methane gas hydrates", which makes it possible to stabilize methane hydrate decomposition when the system is transferred from the area of hydrate stability to the area of thermodynamic parameters, thus significantly reducing the environmental problems of the Black Sea.
Practical value. This article offers a technological solution for stabilization of equilibrium conditions by hydrophobic material "Ramsinks-2M" in the system "methane-water phase-hydrate-R-2M" to regulate the self-preservation effect of methane gas hydrates

For a long time Lake Kivu's huge methane gas reserves had only interested limnologists or geoscientists because of the uniqueness of the physico-chemical composition of the lake water. In January 2002 during the eruption of the Nyiragongo volcano on the northern, Congolese shore of the lake, a voluminous lava stream entered the lake. This event highlighted once again the dangers connected with the presence of dissolved gases in the water which evoked the deadly gas outburst of Lake Nyos in Cameroon that killed nearly 2000 people in 1986 (Tietze 1987). Because of its current energy crisis, & driven by the vision of having an almost inexhaustible source of power, Rwanda increased its efforts to establish the first worldwide large scale exploitation of dissolved methane gas. Hence, new aspects of Lake Kivu's methane reserves have emerged that centre around the sensitive geopolitical question of the use of a common resource shared by the former warring parties, Rwanda & the Democratic Republic of Congo (DRC). This question becomes even more delicate in view of the plundering of the DRC's natural resources during the wars of the last decade. This article will therefore first analyze the current energy crisis & its political implications in Rwanda & in the eastern DRC, & sketch the origin of methane in Lake Kivu as well as associated natural risks. After a presentation of current methane gas extraction projects in Rwanda & an analysis of the institutional framework, a discussion of the potentials, problems & risks of methane gas exploitation in a post-conflict environment will conclude the paper.

ABSTRACT The Palu City Government plans to reactivate the biogas power plant (PLTBg) project in Kawatuna landfill, which was operated in 2013. Both economic and environmental benefits of the project are important for decision makers. The environmental benefit include the potential reduction of greenhouse gases (GHGs) emissions by the project. The economic benefits are important to estimate as the financial attractiveness of the project, which include the electricity generated and revenue from Certified Emission Reduction (CER). This study aims (1) to estimate the potential GHGs emissions produced by the Kawatuna landfill before PLTBg project, (2) to estimate the potential GHGs emissions reduction due to the project, (3) to calculate the potential CER that can be obtained from the project. This study employs Clean Development mechanism (CDM) AMS-III.G method to estimate the potential GHGs reduction and a simple quantitative analysis to calculate the potential CER of the project. The results show that based on the BAU Scenario in 2021, the estimated baseline GHGs emissions is 16.148,74 t CO2e, the potential GHGs reduction after the project would reach 61,40% of the total GHGs emissions generated and the range of potential CER would be from 28.595.318 IDR to 72.329.334 IDR. From 2021 to 2030, total present value of CER would reach 563.358.389 IDR. Keywords: CDM, CER, GHG Emissions, Kawatuna, PLTBg ABSTRAK Pemerintah Kota Palu berencana menghidupkan kembali proyek pembangkit listrik tenaga biogas (PLTBg) di TPA Kawatuna yang sempat beroperasi pada tahun 2013. Informasi mengenai manfaat yang akan diperoleh dari sudut pandang ekonomi dan lingkungan adalah penting bagi pengambil keputusan. Salah satu manfaat lingkungan yaitu potensi reduksi emisi gas rumah kaca (GRK) oleh proyek PLTBg. Manfaat ekonomi penting untuk diestimasi sebagai daya tarik finansial dari proyek, di antaranya berasal dari nilai potensi energi listrik yang dihasilkan dan penerimaan proyek dari Certified Emission Reduction (CER). Tujuan penelitian ini adalah (1) mengestimasi potensi emisi GRK yang dihasilkan oleh TPA Kawatuna sebelum implementasi proyek pemulihan gas metana, (2) mengestimasi potensi reduksi GRK dari proyek tersebut, (3) menghitung potensi nilai CER yang dapat dihasilkan dari proyek tersebut. Penelitian ini menggunakan metode CDM AMS-III.G untuk mengestimasi potensi reduksi GRK dan menggunakan kuantitatif sederhana untuk mengestimasi nilai CER proyek. Hasil penelitian menunjukkan melalui Skenario BAU pada tahun 2021, potensi emisi GRK sebelum adanya proyek adalah 16,148,74 t CO2e dan potensi reduksi GRK setelah adanya proyek mencapai 61,40% dari total emisi yang dihasilkan. Potensi penerimaan CER proyek pada tahun 2021 berkisar antara Rp 28.595.318 hingga Rp 72.329.334 dan total present value penerimaan CER pada tahun 2021-2030 mencapai Rp 563.358.389. Kata kunci: CDM, CER, Emisi GRK, Kawatuna, PLTBg

Climate change is a global issue requiring unified action. Methane gas is a major component of greenhouse gas emissions contributing to global warming. This project is exploring the commercial potential of Pastoral Greenhouse Gas Research Consortium (PGgRc) developed technologies designed to mitigate the largest source of agricultural methane emissions. These technologies are methane vaccines and inhibitors targeting emissions from enteric fermentation in ruminant livestock. The two technologies share functional aspects but require different administration and upkeep. As novel technologies designed for a developing market the commercial potential of PGgRc's methane vaccines and inhibitors is uncertain. To validate the potential methane mitigation products this project focuses on farmer adoption and interaction with the technologies. Interviews with farmers around New Zealand have been used to identify the strengths and weaknesses of methane vaccines and inhibitors from the perspective of the end user. A thematic analysis of the transcribed data highlighted various concerns among the participating farmers and provides a map of areas needing further investigation when moving forward with developing the technologies. Of key importance was the value methane vaccines and inhibitors offered the participants. Currently, methane mitigation offers no financial benefits to participants and good feelings about acting against climate change are not substantial enough to mitigate purchase and administration costs. There is potential that using PGgRc's methane vaccines and inhibitors could improve livestock productivity, but it is yet to be verified based on current testing and development. Establishing that using the technologies leads to increased live weight gain or milk and wool production could provide profitability benefits that farmers would value. This hinges on any benefits providing substantial enough gains to the farmer to offset the purchase and administration costs. If no productivity benefits are identified government regulations creating a methane cost or subsidising the technologies could be necessary for methane vaccines and inhibitors to have value within the agricultural sector. Alternatively, if consumer purchasing behaviour shifts in favour of low emissions products the agricultural sector will need to shift production methods to remain competitive in the new market environment. PGgRc aims to employ a licensing business model using the methane vaccine and inhibitor IP they possess. Partnering with an experienced company would provide PGgRc with the market knowledge and manufacturing capabilities producing their technologies requires. As part of their development strategy they aim to develop their technology to a proof of concept stage before forming any production partnerships. This project highlights the critical factors for successfully commercialising PGgRc's technologies. It is designed to guide the continued development of the methane mitigation technologies and help shape PGgRc's market approach.