This paper proposes a new foaming technology (solid-state foaming) to produce structural foams from waste thermosetting resins. The proposed technology is easy and does not require specific and expensive equipments. Solid tablets are produced by cold compaction of resin powder, and foam by heating in an oven. Composite foams can be produced by mixing fillers and resin powder before the cold com...

Expansion of urban populations, increased coverage of domestic water supply and sewerage give rise to greater quantities of municipal wastewater. With the current emphasis on environmental health and water pollution issues, there is an increasing discharge of waste water in developing countries. Present technologies in developing countries for treating waste water are not sufficient and cost ef...

In the management of municipal solid waste (MSW), the sorting-composting approach presents many advantages. However, since MSW contains a number of chemical and biological agents, the compost should not be necessarily a harmless product. These contaminants may expose different populations to health hazards, ranging from the composting plant workers to the consumers of vegetable products grown i...

In this paper, we show that introducing a unit–based fee for the collection of household waste may lead to undesirable environmental impacts. Such a fee provides households incentives to generate lower quality organic waste as a form of dumping. An applied general equilibrium model is built that incorporates organic waste in high quality, low quality, and rest waste, including the possibility o...

Modeling composting processes is the prerequisite to realize the process control of composting. In this paper, a simulation model for domestic solid waste composting processes was developed based on microbial process kinetics, mass conservation equation, energy conservation equation and water balance. Differential equations describing microbial, substrate, oxygen concentrations, moisture conten...

this study by the first, was carried out to evaluate and comparing disposal waste management in karaj's hospitals in 1387. interview and observation methods were used to collect data and the study tool was a questionnaire. data were analyzed by the spss, using chi-square and t-test. regarding the condition of infectious waste generation, 64% of the hospitals had a good grade. source separa...

Method: The authors have mentioned that they have used both quantitative and qualitative data collection techniques. This does not make sense! I cant really figure out the quantitative data that was collected. It is important for the authors to mention exact method that was used for collecting data e.g. interviews, questionnaire or interviews and questionnaire. Response: The methods used have b...

The treatment of liquid wastes in municipal sewage treatment plants creates significant quantities of solid residue for disposal. The potential hazard from these wastes requires that their characteristics be determined accurately to develop environmentally sound management criteria. It is readily recognized that the sludge characteristics vary with the type and degree of industrial activity wit...

A bacterium, designated strain DC-196(T), isolated from kitchen refuse compost was analysed by using a polyphasic approach. Strain DC-196(T) was characterized as a Gram-negative short rod that was catalase- and oxidase-positive, and able to grow at 10-40 degrees C, pH 6-9 and in NaCl concentrations as high as 3 %. Chemotaxonomically, C(18 : 1) was observed to be the predominant cellular fatty a...