In this paper, the optimum composition of fly ash and plastic waste in a composite has been established based on various performance tests. The optimum dose of plastic waste in composite is 8% weight of fly ash. Laboratory tests indicated increased resistance to moisture damage in stone Matrix Asphalt (SMA) mixture containing composite as filler. The values of resilient modulus of the SMA mixture containing composite are fairly high compared to SMA mixture containing lime as filler.

This study investigated the use of effective microorganisms (EM) for enhancement of biogas production through composting of solid pyrethrum remains after extraction of pyrethrins (marc). The laboratory scale experiment involved composting of the waste as substrate mixed with EM at different ratios consisting of a control, substrate with EM at of 1:250, 1:500, and 1:1000 v/v. Results show highest production of biogas at EM ratio 1:500 v/v, while biogas produced at EM ratio of 1:250 v/v had the highest methane yield.

Leaking underground storage tanks (USTs) containing gasoline represent a significant public health hazard. Virtually undetectable to the UST owner, gasoline leaks can contaminate groundwater supplies. In order to develop remediation plans one must know the extent of gasoline contamination. Centrifugal simulations showed that in silty and sandy soils gasoline moved due to the physical process of advection and was retained as a pool of free products above the water table.

Energy efficiency and the profitable use of biomass residues are often demonstrated by pulp and paper factories, which are forerunners in this area. A new example is given by Dalkia and Metso, global players in bioenergy service and technology in France.

Organic farming is gaining wide attention among farmers, entrepreneurs, policy makers and agricultural scientists because it minimizes dependence on chemical inputs like fetilizers, pesticides and other agro-chemicals and safeguards and improves the quality of resources and the environment.

Agricultural  application  of  Municipal  Solid  Waste  (MSW),  as  nutrient  source  for plants and as soil conditioner, is the most cost­effective option of MSW management because  of  its  advantages  over  traditional  means  such  as  landfilling  or  incineration.