Food waste (FW) has traditionally been disposed by incineration or landfilling; however, it can be converted to green methane (GM) via anaerobic digestion, and GM used as fuel for light-duty natural gas vehicles (LDNGVs). A lifecycle assessment (LCA) of FW-based production LDNGV operation in China, a new scenario, was performed. The LCA results were compared with those the conventional FW treat...

To enhance the sustainability of water supply systems, development new technologies for micro scale hydropower remains an active field research. The present paper deals with implementation a micro-hydroelectric system drinking facilities, targeting gross capacity between 5 kW and 25 kW. A counter-rotating microturbine forms core element energy recovery system. modular in-line technology is supp...

[1] We report original data on nitrous oxide (N2O) fluxes from two tropical reservoirs, their rivers below the dam, and from natural aquatic ecosystems and rainforest soils in French Guiana and Panama. We also review published N2O fluxes from other tropical reservoirs and natural environments. We show that: (1) N2O emissions from tropical reservoirs occur mainly at the reservoir surface, fluxes...

Solar PV and wind energy are the most important renewable sources after hydroelectric with regard to installed capacity, research spending attaining grid parity. These sources, including battery storage systems, well-established load modeling have been pivotal success of planning operation electric microgrids. One major challenges in renewable-based DGs, storage, loads microgrids is uncertainty...

Methanosarcina mazei is a strictly anaerobic methanogen from the Methanosarcinales order, which is known for its broad catabolic range among methanogens and is widespread throughout diverse environments. The draft genome of the strain presented here was cultivated from sediment samples collected from the Tucuruí hydroelectric power station reservoir.

OUTLOOK: NEGATIVE Rationale Standard & Poor's Ratings Services revised its rating outlook to negative from stable on Chelan County Public Utility District (PUD) No. 1, Wash.'s hydroelectric consolidated system revenue bonds. At the same time, Standard & Poor's affirmed the 'AA' rating on the bonds and assigned its 'AA' rating to the district's $147 million electric revenue bonds, series 2004. T...

Infrastructures, such as roads, mines, and hydroelectric dams, are proliferating explosively. Often, this has serious direct and indirect environmental impacts. We highlight nine issues that should be considered by project proponents to better evaluate and limit the environmental risks of such developments.

Climate change is likely to affect the generation of energy from California’s high-elevation hydropower systems. To investigate these impacts, this study formulates a linear programming model of an 11-reservoir hydroelectric system operated by the Sacramento Municipal Utility District in the Upper American River basin. Four sets of hydrologic scenarios are developed using the Variable Infiltrat...

The thrust bearing, as the only part bearing axial load, is extremely important in vertical hydroelectric generating units. Its working condition directly affects safe and reliable operation of unit. However, during operation, oil film easily damaged under influence complex factors. Installation deviation a key point that can cause temperature pressure changes film, affecting force on bearing. ...