Rakesh Trivedy

• Managing Director at EM International

A lot of new technologies have emerged since the 1970s to make the socio-economical life of human being better and comfortable. Biotechnology has taken the important place amongst the other technology developed since 1970 to 1990, in various fields like food production, renewable raw materials and energy, pollution prevention, and bioremediation. T...

A comprehensive environmental study was carried out at for a corporate training centre at Lonavala, India. The baseline environmental status was assessed based on primary and secondary data collected through on-site field observations. Attributes of the physical environment like air, water, soil, air microflora and noise quality in the surrounding...

A comprehensive survey and audit was carried out at an Engineering industry in Karnataka, India. The base line study was conducted during Pre Monsoon season beginning from the month of March 2011 for air, water, soil, noise, biological and socio-economic components of environment; identification, prediction and evaluation of impacts and delineation...

Biotechnological techniques like molecular biology, enzymes engineering, genetic engineering genomics, proteomics, metabolomics and bioinformatics etc. have helped in developing economically feasible and well designed methods in production of pulp and paper sector. Biotechnology increases the cost efficiency, develop environmentally feasible proces...

Biodiesel is produced domestically from a variety of seed oils including soybeans, rapeseed and corn. Biodiesel can be used in diesel engines (cars, trucks, busses, construction equipment), in jet engines and, in heating and electricity generating systems. Use of biodiesel reduces nitrogen oxide emissions compared to fuel oil (a form of diesel fuel...

The presences of pharmaceuticals in the environment are increasingly a worldwide concern. Patients, in case of drugs for human use, or animals for veterinary drugs are the main sources of contamination. Several pharmaceuticals widely used in human medicine are excreted unchanged or as active metabolites in high percentages and continuously discharg...

The usefulness of water quality indices, as the indicators of water pollution, for assessment of spatial temporal changes and classification of River water qualities was verified. Four water quality indices were investigated: WQI (considering 18 water quality parameters), WQImin and WQIm (considering five water quality parameters: Temperature, pH,...

This research illustrates the development of compost with the help of agricultural waste keeping in mind the nutrient requirements of plants. A process of converting any considered raw material into pure organic fertilizer for agronomic and other uses, particularly organic food market, is very essential. Our aim is to reutilize the organic waste an...

Climate change' caused by anthropogenic activities is going to cause a major impact on water, forest, biodiversity, agricultural productivity and human health. A large number of scientific studies and IPCC's (Inter Governmental Panel on Climate Change) fourth assessment reports are now available. According to these documents global climate change i...

It is estimated that 90% of sewage in cities in developing countries are today discharged untreated into water bodies. The physical, biological, chemical, and geologic interactions among different components of the environment that occur within a wetland. Anzali wetland complex is a good example of a natural wetland, characteristic of the south Cas...

LLindane belongs to the organochlorine class of pesticides that have been banned in most of the developed countries in the 1970s. There are basically five stable isomers (actually eight isomers) of lindane - á, â, ã and å. Only ā isomer has insecticidal properties and due to its persistence in the environment (presence of recalcitrant chlorine grou...

The paper discusses some low cost and energy saving technologies for water and wastewater treatment. Conventional technologies of wastewater treatment are highly power intensive and are thus not desirable in the present era of climate change and energy conservation. These technologies are also capital intensive in erection and are usually end-of-th...

Biological assessment is a useful alternative for assessing the ecological quality of aquatic ecosystems since biological communities integrate the environmental effects of water chemistry. Algal and water samples were collected in the different seasons from four points of the Mula River (Pune, India). The most pollution tolerant genera and species...

The physico-chemical parameters with special references to phytoplanklon's in Mutha river situated in Pune city (Maharashtra-India) were investigated for a period of one year from October 2004 to September 2005. Algal and water samples were collected at monthly intervals from three stations of river. The main purpose of this study was to document r...

Around the world, there is an increasing trend in areas of land, surface waters and groundwater affected by contamination from industrial, military and agricultural activities due to either ignorance, lack of vis-on, or carelessness. In the last three decades a special interest in the world is aroused by the potential of using the biological method...

The paper discuses availability and the further of renewable freshwater supplies demands land human health. The situation is discussed in global and Indian perspectives.

Phytoremediation, the use of plants and their associated microbes for environmental cleanup, has gained acceptance in the past 10 years as a cost-effective, noninvasive alternative or complementary technology for engineering-based remediation methods. Plants can be used for pollutant stabilization, extraction, degradation, or volatilization. These...

Performance data of 3 water hyacinth based and four emergent plant species based wastewater treatment plants in India is reviewed in the present paper. Water hyacinth based systems were employed for treatment of sewage and industrial wastes. All the three systems are full-scale plants. The performance of hyacinth based systems was good despite poor...

Studies carried out recently in relation to 1241 cotton mill workers. 789 asbestos workers and 4129 community subjects are briefly presented herein which depicts the occupational health scenario in India. The prevalence of byssinosis was 24 percent, 21 percent and 10 percent in 3 mills (semi-modern, old and new mills) respectively. The prevalence o...

In the present study treatment of wastewater from a large dairy by using water hyacinth was studied in laboratory experiments. Effects of depth of the system, variations in area coverage, prior settling and of daily renewal of the plants was also studied on the efficacy of hyacinth in treating the dairy waste. Water hyacinth (Eichhornia crassipes)...

The paper reports groundwater pollution around st. Thomas Mount Panchayat Union, T.N. The water quality was found to be seriously affected by tanneries waste disposal. Chromium was found to be higher in concentration. Suggestions for water quality improvements have been given.

A study was carried out on the treatment of diluted distillery waste by using a constructed wetland on laboratory scale using Typha Latifolia. The root zone bed was prepared by using 26 gauze galvanized metal sheet. The shape of the bed was kept rectangular (length 1.5 m, breath 0.3 m, and height 0.3 m). The bed was filled with 75% sand and gravel...

The paper describes important legislations governing quality of freshwaters in India. Notification on Environment Impact Assessment 1994 and recent action at Ministry of Environment and Forests is also described.

Aquatic plants based wastewater treatment systems are becoming popular in India and performance for two constructed water hyacinth systems was studies (one treating sewage from a hospital and Medical College complex; and the other a light engineering industry waste) for one year. A very high degree of reduction was obtained in suspended solids, BOD...

The paper discusses toxicity of cyanides, generation and hazards of cyanide containing wastes and Review of studies on treatment of cyanide containing wastes by chemical and biological methods.

Chlorophyll content and phytoplanktonic primary production were studied in a non-polluted and a polluted reservoir near Jaipur. The polluted reservoir (Mansagar) has been receiving the untreated sewage of Jaipur city. It has also been infested with water hyacinth since 1979. -from Authors

Water hyacinth (Eichhornia crassipes (Mart.) Solms.) invaded a eutrophic reservoir receiving domestic sewage near Jaipur (India) during 1975 and gradually developed a complete thick cover over the whole water body during Sept.–Oct. 1978. The physico-chemical characteristics of the water and the phytoplankton composition were studied during Sept. 19...

Jamwa Ramgarh reservoir near Jaipur (Rajasthan) is one of the oldest man-made lakes in western India. This paper presents a case study of likely impacts of human activities in freshwater bodies. The history, vegetation and human activities in the catchment area, flora and fauna, physico-chemical characteristics and production in the reservoir are b...

The paper reports the occurrence of floating islands in an impoundment infested with water hyacinth. Data on chemical composition of the islands, the surrounding water and the bottom soil of the impoundment are given, to show that the floating islands are rich reserves of nutrients and differ considerably from their surroundings. Some comments have...