Pig farming in mechanically ventilated barns requires much electricity for ventilation or exhaust air purification. Furthermore, thermal energy is needed to fulfill the animals’ temperature requirements, especially piglet rearing. Electrical and input leads CO2 emissions operating costs. Up 90% of heat losses are due exhausted air. Heat exchangers can recover from warm transfer it cold fresh Th...

Biogas and biohydrogen, due to their renewable nature zero carbon footprint, are considered two of the gaseous biofuels that will replace conventional fossil fuels. from anaerobic digestion must be purified converted into high-quality biomethane prior use as a vehicle fuel or injection natural gas networks. Likewise, enrichment biohydrogen dark fermentation requires removal CO2, which is main p...

Surfactant-enhanced aquifer remediation (SEAR) is widely considered a promising technique to remediate dense nonaqueous phase liquid (DNAPL) contaminations in-situ. The costs of a SEAR remediation are important and depend mostly on the setup of the remediation. Costs can be associated with the installation of injection and extraction wells, the required time of the remediation (and thus labor c...

This article presents the results of an analysis economic viability using installation for treatment grey water. Economic indicators in form simple payback time (SPBT) and net present value (NPV) were used analysis. The use a dual water supply system should theoretically enable reduction costs both sewage disposal, ensuring investment profitability. impact number residents as well on profitabil...

Estimates of the potential market size for genetically engineered pharmaceutical products have varied widely over the past several years. The 1988 market size has been estimated at about $800 million and this is forecast to reach about $4000 million by 1 Y9S [ I ] . It is difficult to be sure of the accuracy of any of these figures; however, with nine biotechnology-derived products currently on...

Furfural is only derived from lignocellulosic biomass and an important chemical used in the plastics, agrochemical, pharmaceutical industries. The existing industrial furfural production process, involving reaction purification steps, suffers a low yield intensive energy use. Hence, major improvements are needed to sustainably upgrade process. In this study, conventional process based on contin...

The main points of the regeneration Na-cationite filters first stage with pre-connected "hungry" H-cationite in conditions operation on Ural water at intake near city Orsk, Orenburg region, are considered. energy and resource costs filter cycle estimated. estimation consumption for operating as chain chemical purification enterprise was made. dependence specific salt, a material resource, relat...

In this work two alternatives are presented for increasing the purity of hydrogen produced in a membrane reactor ammonia decomposition. It is experimentally demonstrated that either thickness selective layer or using small purification unit permeate membranes, ultra-pure can be produced. Specifically, results show above 6 μm obtained at pressures below 5 bar. A cheaper solution, however, consis...