Experimental Study on Wastewater Treatment of Expressway Service Area in BAF
The removal effect of main pollutant which was in the wastewater of expressway service area was investigated in the up-flow biological aerated filter (UBAF) with different hydraulic loadings. The result showed that with the increase of hydraulic loading, the removal rates of the chemical oxygen demand (COD) and turbidity decreased. At hydraulic loading of 0.5 m3/(m2&#x2022;h), removal rates of COD and turbidity were 79.6% and 80.2% respectively, which were better than that of 56.5% and 48.7% at hydraulic loading of 1.25 m3/(m2&#x2022;h).
Optimization of bed material height in a submerged biological aerated filter
Several years after beginning to study submerged biological aerated filters, the Environmental Technology and Environmental Microbiology Research Group (University of Granada, Spain) optimized the performance of this system, using a ceramic-based material bed. This material is generated by ceramic materials factories, as a waste product which is then grinded. Therefore, the use of this bed material maximizes the use of discarded material. A comparative study of height for the ceramic-based material bed, with regard to the TBOD5 and suspended solids parameters, is presented. For every bed material height, relations among volumetric loads applied and effluent concentrations are presented, as well as relations among hydraulic loads applied and effluent concentrations. Aiming for a maximum consumption value of 1.2 kg O2/kg TBOD5,eliminated, the air volume supplied was fixed. The real values obtained for this parameter are presented in relation to the TBOD5 volumetric load applied. The tests were performed at ...
Simulation and control of hybrid renewable energy system connected to the grid
This paper presents a control and simulation of hybrid renewable energy system connected to the grid. The studied system includes a photovoltaic panel, synchronous permanent magnet generator based wind turbine, and a battery for storage energy. The PV array and wind systems are connected to the common DC bus by a boost converter. The battery is connected by a bi-directional DC/DC converter, and then integrated into the AC utility grid via a common DC/AC inverter. In order to extract the maximum energy, a simulation study has been carried out according to the meteorological conditions (wind speed and variable solar irradiance) while maintaining power quality at a satisfactory level. In order to capture the maximum power, a MPPT algorithm is applied for both wind turbine and photovoltaic panel. The modeling and simulation of the whole system has been performed under Matlab/Simulink environment. The obtained results show that the current and the voltage of grid side are sinusoidal and alternative forms, and the power injected to the grid is around the power produced by the hybrid system.