The up flow anaerobic sludge blanket reactor (UASB) has been used successfully treat a variety of wastewaters. The aim of this review is to synthesize and analyze information on how the process of granulation is affected by environmental and operational conditions in the reactor. The factors reviewed are strength of substrate, nutrients, multivalent cations and heavy metals, exocellular polymer...

The upflow anaerobic sludge blanket (UASB) reactor has been used successfully treat a variety of wastewaters. The aim of this review is to synthesize and analyze information on how the process of granulation is affected by environmental and operational conditions in the reactor. The factors reviewed are strength of substrate, nutrients, multivalent cations and heavy metals, exocellular polymer,...

The UASB Reactor concept represents a very promising proposition for the anaerobic treatment of a variety of industrial wastes and even of domestic wastes. In the present study, after careful acclimatization, the granules were found to be well adapted to fish processing effluent and the COD reduction was upto 96% at organic loading rates from 150 mg l–1 d–1 to 2,200 mg l–1 d-1. The biogas produ...

In this article a dynamic model of a continuous working UASB reactor is described. It results from the integration of the fluid flow pattern in the reactor, the kinetic behavior of the bacteria (where inhibition and limitation were taken into account), and the mass transport phenomena between different compartments and different phases. The mathematical equations underlying the model and descri...

The influence of some effective parameters on the removal efficiency of a 500 liters UASB reactor was investigated. The best conditions to removal the pollution loading is pH=7 and temperature range of 35 to 38°C. The optimal of hydraulic retention time in medium COD amounts (800-1800 mg), is 5 h and in the high COD load (1800-2600 mg) is 6 h. Furthermore, the hydraulic rate is between 0.67-0.8...

This paper presents the results of five years monitoring of an experimental wastewater treatment plant in southeast Brazil, comprised of a UASB reactor followed by a submerged aerated biofilter (BF) (field scale) and shallow polishing ponds (pilot scale). Three ponds in series achieved high quality effluent standards in terms of ammonia and E.coli, but a fourth pond did not result in further ef...

Metal mining extraction and concentration need water. The recycling of liquid effluents reduces its consumption. This recycled water must contain low concentrations metals. project’s first objective was to start up a laboratory-scale upflow anaerobic sludge blanket (UASB) reactor for biotransforming metal sulfates into sulfides effluent from flotation units plant (FE). second determine the effe...