This study was undertaken to evaluate a novel aerobic wastewater treatment model for the remediation of refinery effluents and to assess the removal efficiency of Bulkholderia cepacia strain AJI and Corynebacterium kutscheri strain AJ2 to clean oil waste from petrochemical company. Wastewater quality parameters including pH, BOD5, COD, TDS, OIL & GREASE, PHENOL concentration, TPH and THC were m...

In greased contacts, the complex rheology of a grease, depending on thickener, base oil and additives, becomes key point for understanding controlling evolution friction coefficient at extremely low sliding velocities. Such velocity range (from 0 to few mm/s) is main relevance several issues, such as unstable friction-induced vibrations, which can occur well in case lubricated interfaces. this ...

Two types of thickener systems, lithium complex (LiX) and polypropylene (PP), were chosen to evaluate graphite, graphene oxide (GO) reduced (rGO) as grease additives at a concentration 0.1 wt%. To enhance the additive dispersibility, mixture polyalphaolefin oil (PAO) soluble synthetic polyalkylene glycol (OSP-68) was used base oil. The greases evaluated in i) silver-coated copper contacts simul...

Grease lubricants are widely used in rolling contact applications to reduce friction between two surfaces. Improper lubrication may cause high stress and deformation the bearings lead machine failure The purpose of this study is investigate coefficient produced by newly developed palm oil-based grease characteristics lubricated roller bearings. In work, new greases was evaluated experimentally ...

This study was conducted to determine the effects of four different dietary fat sources on performance, fatty acids composition of abdominal fat, thigh skin, breast and thigh muscle of broiler chickens. Soybean oil (SO), poultry grease (PG), beef tallow (BT) and a mixture of soybean oil with poultry grease (SPG 1 : 1) were used as fat source. A total 395, 4-day-old broilers were randomly assign...

This study focused on the evaluation of the specific biological heat potential (hb) of a food-processing artificial wastewaterin the autothermal thermophilic aerobic treatment (ATAT) system. A novel experimental method was developed to evaluate the hb value by using the heat balance model under the steady state. This system was daily fed with oily and artificial wastewater at 21,460 mg l(-1) CO...

The aim of present work was to bioremediate the waste cooking oil using a novel lipase produced in solid medium containing waste grease and wheat bran by Penicillium chrysogenum. Enzyme extracted with phosphate buffer was purified 10.6 and 26.28-fold after 90% ammonium sulfate precipitation and ion-exchange chromatography, respectively. The partial characterization of enzyme revealed its K(m) a...

Biodiesel, as renewable and biological origin alternative diesel fuel, has been receiving a lot of concern throughout the world due to the energy needs and environmental awareness. However, at present, it is not economically feasible to use food-grade vegetable oils to produce biodiesel because of the surge in feedstocks price. Much attention has been devoted to the application of lower-cost fe...