Pollutant degradation in biotrickling ®lters for waste air treatment is generally thought to occur only in the bio®lm. In two experiments with toluene degrading biotrickling ®lters, we show that suspended microorganisms in the recycle liquid may substantially contribute to the overall pollutant removal. Two days after reactor start up, the overall toluene elimination capacity reached a maximum ...

Hazardous waste management incorporates collection, separation, treatment, recycling and disposal of hazardous wastes. In this paper, a new multi-objective mixed integer model is presented for hazardous waste collection problem. The model aims to minimize transportation and construction costs, and environmental and population risks in hazardous waste management systems. This model is applied in...

The enormous increase in the quantum and diversity of waste materials and their potentially harmful effects on the general environment and public health, have led to an increasing awareness about an urgent need to adopt scientific methods for safe disposal of wastes. While there is an obvious need to minimize the generation of wastes and to reuse and recycle them, the technologies for recovery ...

Community participation has a direct bearing on effective solid waste management. Investigation on community attitude, perception and willingness towards solid waste management was carried out in Bangalore city. Households data was collected randomly based on their socioeconomic status using focus group discussion and structured interviews. On an average 63% of the households are willing to par...

The application of recycle waste tires into civil engineering practices, namely asphalt paving mixtures and cementbased materials has been gaining ground across the world. This review summarizes and compares the recent achievements in the area of plain rubberized concrete (PRC), in details. Different treatment methods have been discussed to improve the performance of rubberized Portland cement ...

This paper is an overview of the status in geo-environment research in the past, the present and the future in Japan as witnessed by the publications in ``Soils and Foundations'' over the years. The authors have paid special attention to the geotechnical researches concerning technologies of waste disposal, including radioactive waste disposal, the reuse and recycle of by-product and waste, the...

Today, with the advancement of technology, turning waste into fuel has been considered as an inexhaustible source of energy production, especially in industries with high energy consumption. The most important of these industries are Cement and Iron Smelting factories. Babol, as one of the largest provinces in the north of the country, has been facing waste management crisis for several years w...