The laboratory model of Rotating Biological Contractors (RBC) which was used in the present study, is a modified one, in respect of, increased reactor depth, varying depth of submergence of rotating discs and supplemental air supply. Synthetic sago wastewater was used to study the performance of the modified RBC.

The present study has been carried out to estimate the phytoplankton diversity of Neyyar and Karamana rivers with special reference to aquatic nutrients. This type of study is relevant since these rivers form the source of water for public distribution system.

The present work relates to isolation of promising Pseudomonas strain from the oil contaminated sites in service stations, Namakkal and then collecting a saline tolerant Pseudomonas strain from the coastal saline region of Rameswaram. These bacterial strains have been optimally characterized with regard to biodegradation of oil.

This investigation pertains to the emission levels of carbon monoxide, carbon dioxide and hydrocarbons from the vehicles that are plying in Madurai city.

The biological agents viz. fungi and bacteria (Pseudomonas sp.) were tried to develop a suitable technology for purification of industrial effluent. Pure culture of Pseudomonas sp. and locally isolated fungi sp. from mix industrial effluents were utilized in the study. The laboratory study was carried out to know the tolerance of Pseudomonas sp. against different heavy metals concentration.

Environmental Impact Assessment (EIA) is concerned primarily with significant environmental impacts. Environmental Assessments (EA) describes the whole process by which information about the environmental effects of a project is collected and assessed by the development before deciding whether to grant planning permission.

This paper describes the pollution status of fourteen major drains, namely Najafgarh drain, Magazine Road, Sweeper Colony, Khyber Pass, Metcalf House, Kudesia Bagh, Civil Mill, Sen Nursing Home, Drain No. 14, Barapulla, Maharani Bagh, Kalkaji, Okhla and Shahdara drain entering into the river Yamuna at Delhi, studied during the year 1999-2000.

Water has pivotal role for the survivality of the mankind. The hydrobiological cycle stores about 0.6% of water as ground water. The ground water level increase by percolation which is extensively used for biodrinking and irrigation. The pesticide in the chemical element causes artificial and natural ground water pollution.

The study pertaining to the thorough study of water, in reference to the quality in terms of sensory, physico-chemical and microbiological parameters, was undertaken in a model city Patiala of state of Punjab. The results indicate that the water samples collected from the different localities and various water sources viz.

Vehicular exhaust pipe emission is one of the major contributors of the air pollution. Present study was an effort of study the impact of exhaust pipe constitutents from two-stroke engine vehicle on the haematological parameters and histopathological pictures of lung and kidney tissues of the male rats during summer season.