Feature Article

India's coal demand is expected to increase with the setting up of more and more coal based power projects and to meet the demand from metallurgical and other industries. Indian coals being of drift origin contain as high as 40% ash in some cases. The coal is, therefore, required to be washed in coal washing plants so that the ash content is brought to an acceptable level, before being utilised by the industries.

The main objective of the present study was to evaluate the anaerobic digestion and composting process for disposal of municipal solid waste (MSW) on economical aspects. Economic evaluation includes 3 major costs: (i) capital cost, (ii) operation and maintenance cost and (iii) reinvestment cost.

Red sandy dunal soils of Tamil Nadu is called Theri soils. They occupy about 20,000 ha. Tuticorin district has the largest area 11,200 ha. Different interpretative systems have indicated that these are not suitable for agriculture. In this study, tank silt is used to amend the soil and the different physical parameters which make the soil better for cultivation are estimated and their interrelationships are presented.

Photocatalytic degradation is a promising technology for the degradation of endosulphan and lindane.

Soil microbial biomass is the living and active part of soil organic matter, which is re-established after disturbance of the land. Study of recovery time of microbial biomass is important for the development of self-sustaining ecosystem in mine degraded land. Increase in soil microbial biomass and organic carbon contents increases the functional diversity and stability of ecosystem.

Continuous dose rate recorded by the network of environmental monitoring stations at Kalpakkam is analysed for estimating the site dose profile with respect to the local climatology. The gamma dose rate recorded comprises of the natural background as well as the dose due to the designed release of Ar-41 gaseous activity from Madras Atomic Power Station.

The main objectives of the study were to measure the indoor air quality in hospital with special emphasis on particulate matter (PM10, PM2.5 and PM1.0).

This paper deals with utilization of flyash to vegetation programmed in abandoned open cast mines of Jharia coalfields, Dhanbad, Jharkhand. Its physical properties are beneficial in vegetation purposes in abandoned opencast mines of Jharia coalfields.

Some good ideas take a while to be copied. This is the case with solar building codes, which were invented in Israel 29 years ago. Within the last two to three years, this political instrument has reached all five continents and will develop solar thermal markets in a sustainable way. The world map shows the status quo in 16 countries.

India is poised to expand its role in photovoltaic manufacturing and use, and to become a global leader in this technology.