Distilleries produce vast amounts of contaminated effluents which if disposed to the water bodies will pose environmental problems hence need to treat this effluent. A membrane bioreactor with Pseudomonas fluorescens as a decolorizing micro-organism was employed for treatment of distillery effluent over 10 days. The effluent pH changed from being acidic (4.2-5.0) to neutral (7.3-8.0). The efflu...

A great effort to recycle batteries has been performed in the last two decades. During this period new directives have been published specially in Europe. The aim of this paper is to review the current status of technologies applied to recycle portable batteries, e.g. lead acid will not be described here. Essentially, this paper presents the current status of the technologies involved in the co...

Exponential polynomials arising in transfer functions of chemical processes with recycle and time-delay preclude the use of standar control technics designed for free-delay systems. In this work a simple and effective methodology to derive an approximate discrete-time model free of delay of a continuous timedelayed systems describing recycle and dead-time processes is proposed. The method is ba...

Engineering problems frequently require solving a sequence of dual linear systems. This paper introduces recycling BiCG, that recycles the Krylov subspace from one pair of linear systems to the next pair. Augmented bi-Lanczos algorithm and modified two-term recurrence are developed for using the recycle space. Recycle space is built from the approximate invariant subspace corresponding to eigen...

An electrochemical cell coupled with a recycle loop through a transmission FTIR cell is employed in studies of two free radical organic reactions, the oxidation of allylic alcohols and the trifluoromethylation of heteroarenes. Rapid mixing through the recycle loop allows continuous monitoring of reaction progress. Electrochemical generation of free radicals allows their controlled mediation int...

When we throw out our trash it is burned in an incinerator or buried in a landfill. If we burn our trash, it pollutes the air. If we bury it, it fills up our landfills and gets out of hand. But ifwe recycle things, it will not pollute anything and we can use it over again. By recycling we also save money. Our county has a recycling program. Every Friday, you have a chance to put out your trash ...