The present study demonstrated the antibacterial effect of photocatalytic oxidation in indoor air using titanium dioxide as the catalyst. Through a series of experiments, it was determined that titanium dioxide did enhance the inactivation rate of the microorganisms under certain conditions. In these experiments the air velocity, relative humidity, and UV (350 nm) intensity were varied. It was found that higher velocities retarded the destruction rate due to the low retention time in the reactor. TiO2 also did not accelerate the reaction at low humidities (30 percent). At a relative humidity of 50 percent, there was complete inactivation of the organisms, but at higher humidities (85 percent), 10 percent of the organisms were still viable. The experiments showed that at higher UV intensities, most of the inactivation was done by the UV photons. However, the photons were not able to completely inactivate the microorganisms. In the photocatalysis experiments there was complete inactivation of the bacteria.

One of the greatest difficulties of developing nations today is electric power generation. The demand for Electric power is far above generation and distribution capacities. Utilizing a plasma torch can mediate for all intents and purposes a wide range of strong urban waste, as well as industrial waste, and get electrical energy all the while. The procedure behind plasma waste treatment is known as plasma gasification, where enough energy is moved to a solid or fluid substance with the end goal that it is changed into incompletely in gas, all the more exactly in synthesis gas (syngas), and another somewhat in liquid magma. The liquid magma cools to turn into an inactive vitreous sub item, leaving possibly risky items caught in a crystalline net, for example, some substantial metals. Hot gases can be utilized for power generation and this can be utilized both to stimulate a similar treatment plant and to convey power to the outside power grid. This is a concise report devoted to consider the feasibility of executing the treatment of urban residues by the utilization of plasma.