Adsorption is considered to be one of the most promising techniques for wastewater treatment over the last decades. The economic crisis of the 2000s led researchers to turn their interest in adsorbent materials with lower cost. The study was conducted to treat the Textile, dye and printing industry effluent using naturally occurring biological adsorbents (Areaca catechu, Moringa pterygosperma, Quercus infectoria and Tamarindus indica). The treatment was carried out on various concentrations (25%, 50% 75% and 100%) of dye effluent. Highest removal of pollutant was observed at lower effluent concentrations (25% and 50%) as compared to higher effluent concentrations (75 % and 100%). The addition of biological adsorbents has brought a significant reduction in various parameters of Textile, dye and printing industry effluent. The reduction in pollution load may be due to the coagulative / chelative property of Areaca catechu, Moringa pterygosperma, Quercus infectoria and Tamarindus indica can be used as low cost and safest biological adsorbents for removing toxic substances in Textile, dye and printing industry effluent.

Composting is one of the cheap and best methods for the disposal of organic waste and its conversion into valuable products. Composting is a spontaneous, biological decomposition process of organic materials in a predominantly aerobic environment. Composting is one of the important and economical methods of the manipulation of a biological process, decomposition; raw organic materials such as manure, leaves, grass clippings, food wastes, and municipal bio solids are converted to stable soil-like humic substances. Composting is an ancient technology undertaken on a variety of levels, from home to industrial which involves a number of microbes. Composting have several benefits, it improves manure handling, possible saleable product, improves land application, minimum risk of different pollution problems, perfect soil conditioner. Composting is a process in which biological breakdown of organic waste under different controlled conditions takes place. The objective of this paper is to study the performance of the aerobic composting of vegetable and fruit wastes in different proportions which may prove to control the environmental pollution and the end product will be useful to the peoples.

Heavy metals and organic pollutants are ubiquitous environmental pollutants affecting the quality of soil, water and air. Over the past 5 decades, many strategies have been developed for the remediation of polluted water.  Use of aquatic plants to extract, sequester and/or detoxify pollutants and is a new and powerful technique for environmental clean up. Plants are ideal agents for soil and water remediation because of their unique genetic, biochemical and physiological properties.  The aim of this work is to evaluate the potential of free floating duck weed Spirodela polyrhiza to remove heavy metals from waste water and the biochemical effect of heavy metals on Spirodela polyrhiza. Approximately 93% of total heavy metal induced – toxicity appears resulting in the reduced activities of nitrate reductase, total chlorophyll and protein content of the plant. The results recommended the use of Spirodela polyrhiza to ameliorate the wastewater contaminated with heavy metals.