This paper is concerned with semi-batch foams generated by injecting gas bubbles in a vertical column containing a liquid phase at rest. Its aim is to better understand the physical mechanisms responsible for foam formation at the liquid free surface and to predict the superficial gas velocity for onset of foaming. The model for predicting the onset of foaming is derived from the one-dimensiona...

Digestion of sugar beet pulp was assessed in relation to biogas and methane production, foaming potential, and digestate dewaterability. Four 4-litre working volume digesters were operated mesophilically (37±0.5 °C) and four thermophilically (55±0.5 °C) over three hydraulic retention times. Digesters were operated in duplicate at organic loading rates (OLR) of 4 and 5 g volatile solids l(-1) da...

In order to improve the fire extinguishing performance of foam agents in nonpolar liquid fires, application alkyl amidopropyl betaine with different chain lengths aqueous film-forming was studied. The relationship between structure alkylamidopropyl and surface tension, foaming property stability analyzed. On this basis, agent formulations were formed, then each formulation tested. results show ...

A working hypothesis for the development of a new construction material based on cement (C) using expanded polystyrene (PPS), technical carbon (TC) and foaming agent (PU) is proposed.The issue improving economic energy indicators due to use building created basis synergistic effect positive characteristics cement, polystyrene, discussed, effectiveness each these materials considered.The main li...

Abstract The application of light weight particleboard in furniture industry becomes more inevitable because the requirement to facilitate transportation and assembly by customer. Herein, a novel method for fabrication foaming was proposed, which is achieved adding azodicarbonamide (AC) agent into formulation that consist oven-dry poplar ( Populus alba ) particles (with moisture content about 4...

Two different membrane treatment scenarios have been applied for of the high strength dark color alkaloid industry wastewater. A bioreactor (MBR) system having separately UF and MF membranes was operated with raw wastewater (scenario-A) anaerobically pre-treated (scenario-B). NF 270, 90 RO (XLE) were used as a polish-ing step at two recovery ratios 50% 75% both scenarios. In scenario-A, COD re-...

Lightweight mortar is a specific type of that made by adding foaming agent. A lightweight has lot pores or cavities filled with air, which reduces the mortar’s weight. The better heat insulation than an ordinary its high porosity. There been much research and application in last few years. This review focuses on natural additive good high-temperature resistance. Many additives can be used, such...

The choice of foaming agent and its mass fraction significantly affect the size number metal foam cells. powder metallurgy process was used to produce aluminium foams with addition various agents: titanium hydride (TiH2) calcium carbonate (CaCO3). TiH2 added in an amount 0.4 wt.%, while quantity CaCO3 varied between 3 5 wt.%. produced foams, approximately same degree porosity, were scanned usin...