Determination of kinetic parameters of a lab-scale upflow anaerobic sludge blanket reator (uasb) removing organic loading from swine manure effluents

Abstract

The present work aimed at determining and evaluating the kinetic parameters from the UASB reactor treating swine manure effluent in a lab-scale experiment. The research was carried out in the Laboratory of Water Analysis at the Engineering Department (LAADEG) at the campus of Federal University of Lavras -UFLA. The system was assembled with an acidification and equalization tank (AET), an UASB reactor and an aerated facultative pond (AFP). The hydraulic retention time (HRT) adopted in the UASB reactor were: 55; 39; 34; 24; 17; and 16 hours. The operational average temperature in the UASB reactor was 25 ± 2ºC. The kinetic studies used the following parameters: Chemical Oxygen Demand (COD T ), Total Volatile Solids (TVS), Temperature, Flowrate and Total Solids Profile (TVS P ), in the reactor, and the number of analyses were: 72; 72; 250; 250; and 30, respectively. The frequency was twice a week for COD T, and TVS, and daily for temperature and flowrate. The kinetic parameters determined were: yield coefficient . The values found were within the range appointed in the specific literatures and were determined based on linear regression studies, giving in this way, a technical scientific support to the physical chemical operational data collected during the operational research period.Index terms: Swine effluents, UASB reactor, kinetic parameters. RESUMOCom a presente pesquisa, objetivou-se determinar os parâmetros cinéticos de um reator anaeróbio de manta de lodo (UASBUpflow Anaerobic Sludge Blanket), em escala laboratorial, empregado para reduzir a carga orgânica poluidora -1 e concentração de substrato limitante K s = 51,70 a 71,80 mg.L -1 de DQO. Os valores encontrados estão dentro da faixa descrita em literaturas específicas e foram determinados com base em estudos de regressão linear, oferecendo assim, respaldo técnico científico aos dados físicos e químicos levantados durante a operacionalização do sistema.Termos para indexação: Efluentes de suinocultura, reator UASB, parâmetros cinéticos.

Determination of kinetic parameters of an upflow anaerobic sludge blanket reactor (uasb), treating swine wastewater

“…With respect the error analyzed, also shown in ββ Table 1 -The models, the estimators and kinetics parameters UASB reactor. Henze et al (1997) Campos (2005), in an experiment that determined a K d of 0.0138 d -1 , value close to that determined in the UASB reactor in this study.…”

“…The kinetic parameters were determined using the Monod kinetic model, described by Campos et al (2005) and Bhunia;Ghangrekar (2008), briefly deduced herein as follow: Inflow -outflow = Acumulation -Conversation μ Where: X r = concentration of biomass in the effluent (mg L -1 ); X: concentration of biomass of the effluent (mg L -1 ); Co =: the afluent substrate concentration (mg L -1 ); C = the substrate concentration in the effluent (mg L -1 ), : specific …”

“…Amongst the various mathematical models used to describe kinetics, the Monod model is the most applied, based on the principle that the growth rate of microorganisms is proportional to the consumption of substrate (CAMPOS et al 2005). The major objective of this study is to determine the kinetic behavior of a pilot-scale UASB reactor operated in series and receiving effluent from an Anaerobic Baffled Reactor (ABR), both treating swine wastewater.…”

Characterization of an acidification and equalization tank (AET) operating as a primary treatment of swine liquid effluent

“…The AET was operated at different flow rates, depending on the type and characteristics of the influent. Campos et al (2005a) worked on a laboratory scale with swine effluent and observed the accumulation of solids in the bottom of the AET caused by the excessive hydraulic retention time (HRT). This study also showed that the HRT caused an increase in the concentration of settling solids, which was repressed in the AET (Fig.4).…”

Kinetics of Organic Matter Degradation in an Upflow Anaerobic Filter Using Slaughterhouse Wastewater

“…This enables the identification of operational factors (substrate, temperature, pH, among others) that affect kinetics, thereby contributing to the establishment of optimal operational conditions for the treatment process [8,9].…”