The survey revealed the fact that in India, alum is used for the improvement of effluent quality but the work on alum recovery and reuse is fragmentary. Therefore this work emphasized on recovery of alum from sludge and its reuse for waste water treatment. Various methods have been reported for treatment and disposal of alum sludge.

The removal of fluoride from synthetic sample by adsorption on activated carbon prepared from gulmohar fruit shell was studied to determine the effects of dosages and pH accordingly to equilibrium and kinetics. The removal of fluoride by adsorption was studied on two types of carbons i.e., physically activated and chemically activated with I.R's of 0.25, 0.50 and 0.75.

The goal of any water treatment plant is to supply safe drinking water to the consumers. This study was conducted to generate a scientific Water Quality (WQ) data at treatment plant, underground reservoirs (UGRs) and consumer's end at seven municipalities for a period of fifteen months.

The recognition of noise as an environmental problem and its impact both on community and occupational environment is rapidly growing. The present survey is aimed to report about the existing noise environment in Roorkee. A cross section survey of population in Roorkee points out that main sources of noise pollutions are automobiles and loudspeakers.

The objective of this study is to find out the optimum OLR at which the UASB reactor can be operated in treating domestic sewage and sugar mill effluent, in conjunction at a predetermined optimum mixing ratio of 75:25.

The recent trends of increasing awareness of economic and environmental cost of conventional landfilling are being developed in accelerating pace for the degradation of the organic fraction of municipal solid waste (MSW).

The Indian mining industry indicates almost the full range of extractive and mineral products and their operations range from small-scale mining through to some of the largest mining operations in the world.

This study reveals detailed geochemical investigation of inorganic constituents including heavy metals in the ground water surrounding the dumpsite area at Muzaffarpur. The pH was found to be increased in some cases. Few water samples showed the total hardness and alkalinity value beyond the standard limit. COD value was found to be maximum in nearest points to dump sites.

The use of heavy metals along with the associate risks of metal pollution has increased to a great extent over the recent times. Cadmium is one of the most harmful toxic metals. This metal is being increasingly consumed in the industries. Its pollution potential, has therefore given rise to the necessity of removal of cadmium from wastewater.

The present study is aimed at assessing the bridge project, ensure adverse environmental impacts be identified and evaluated in the earlier stage of the project development so as to develop appropriate measures including alternative alignments and designs to avoid, mitigate, reduce or otherwise minimize the adverse impacts to acceptable levels for a bridge across Ennore creek of 720 m length and s