Technology options involving the use of natural and accelerated bioremediation systems to treat complex mixtures of aromatic wastes would be a useful addition to current remediation strategies. The approach outlined in this paper would focus on harnessing the potential of a key detoxification enzyme, glutathione-S-transferase (GST) as part of an accelerated phytoremediation system to detoxify aromatic pollutants in soil and ground water. Major efforts will include the clarification of GST detoxification activity by characterizing the enzyme in a series of phenolic and azo-dye-tolerant phytoremediation candidates (e.g. elite clones of thyme), and the development of methods to manipulate the GST detoxification pathway in elite plant clones to accelerate the detoxification of aromatic pollutants. The information provided by the GST characterization studies could be used to develop significant new phytoremediation systems based on manipulated GST biotransformation pathways in elite plant clonal systems tolerant to highly polluted environments. One major advantage of the new phytoremediation systems would be their potential to perform in highly contaminated environments by providing a favorable rhizophere zone for microbial degradation of aromatics along with an enhanced GST-linked detoxification pathway

Macro-porous cellulose carrier (AQUACEL) was applied for immobilization of denitrifying bacteria to develop a practical nitrogen removal system with high performance. When the immobilized cell was applied to denitrification under high nitrogen loading rate, flotation of carriers caused by the evolution of nitrogen gas resulted. To counter the problem of carrier flotation, new reactors using hydrodynamic jet flow and centrifugal force were developed. These new reactors distributed homogeneously the floating carriers, and complete denitrification was obtained even at high loading rate of 20 kg N/cu m-carrier/d. This AQUACEL system was effectively applied to denitrification of wastewater discharged from an eletroplating factory

The total effects of the physical as well as the biotic factors on the ecosystem is discussed. During the wet season, the salinity drops appreciably while during the dry season it is high again and reaches in places to 35%. During the rains water temperature increases and during the winter period it falls. Hekton, plankton, phytoplankton and zooplankton grow in abundance. The higher and lower levels during the rainy season and the wet period respectively have positive effects in influencing the environment. The coastal water is affected by the interaction of the terrestrial mangrove forest and the sea. The coastal water of the Bay of Bengal is subjected to constant water pollution and is the region where the ecosystem is jeopardized. The chlorinated hydrocarbon concentration is higher in the sea water than in the south eastern cost. There is an abundance of snails and oysters in the south eastern cost than in the south eastern waters. Human activities, land cultivation and the continued use of various chemical fertilizers threaten to pollute the waters of the bay. The oil spills in the southern part of the bay and the industrial wastes of the coastal zones may also be similar threats to its water. The study was made to monitor, assess, and investigate this aspect of the bay.

The following types of pollutants were discussed: (1) oil pollution from oil spills and oil slicks; (2) industrial wastes; (3) solid waste and garbages; (4) domestic sewage discharge; (5) insecticide pollution; (6) nutrient pollution; (7) heavy metal pollution; (8) river discharge silt; and (9) the extent of pollution. To control marine pollution, suitable monitoring system, coastal guard system and some other measures were recommended.