Abstract:This research aimed to estimate the kinetic parameters of a UASB reactor treating swine wastewater from farming. The system consisted of: a degritter with a triangular-notch weir in order to measure the flow; a static sieve; an acidification/equalization tank (AET); ABR and UASB reactors; a settling tank; two infiltration ponds and a greenhouse for fertirrigation. The hydraulic retention times (HRT) adopted for the UASB reactor, were: 8.0; 9.6; 8.4; 6.0 and 4.8 hours. The operational temperature was 23.4º C±1.… Show more
“…By utilizing kinetic models, the important information of bacteria can be obtained, such as bacterial specific growth rate, saturation coefficient, bacterial decay coefficient, and yield coefficient. To obtain the kinetic model parameters of the UASB reactor, a simple linear regression method can be applied as also implemented by Matangue et al [9] and Bhunia and Ghangrekar [10].…”
Section: Estimation Of Bacterial Reaction Kinetics With Simple Linearmentioning
Organic liquid waste from food production industry is inevitable. High chemical oxygen demand (COD) contents in organic liquid waste could disrupt the water ecosystem. On the other hand, COD contents can be reduced and utilized to produce biogas by UASB reactor. However, there is a problem in operating UASB reactor, namely the high biomass content in methanogenic granule form, which is washed out with the effluent. The influent flow rate affects biomass content and the suitable flow rate is important for the particular UASB reactor. To investigate the matter, the estimation of Monod parameters is determined to study the kinetics of substrate (COD) and biomass (active methanogenic granule). In this work, simulations of lumped and distributed models are performed to observe the behavior of substrate and biomass inside the reactor. It is concluded that the suitable influent flow rate for UASB reactor is 150-175 m 3 /h, and the washed out biomass content is relatively low (from 0.001393 to 0.4919 kg/m 3). The steady-state condition is achieved from 2027 to 2533 days, with high COD removal.
“…By utilizing kinetic models, the important information of bacteria can be obtained, such as bacterial specific growth rate, saturation coefficient, bacterial decay coefficient, and yield coefficient. To obtain the kinetic model parameters of the UASB reactor, a simple linear regression method can be applied as also implemented by Matangue et al [9] and Bhunia and Ghangrekar [10].…”
Section: Estimation Of Bacterial Reaction Kinetics With Simple Linearmentioning
Organic liquid waste from food production industry is inevitable. High chemical oxygen demand (COD) contents in organic liquid waste could disrupt the water ecosystem. On the other hand, COD contents can be reduced and utilized to produce biogas by UASB reactor. However, there is a problem in operating UASB reactor, namely the high biomass content in methanogenic granule form, which is washed out with the effluent. The influent flow rate affects biomass content and the suitable flow rate is important for the particular UASB reactor. To investigate the matter, the estimation of Monod parameters is determined to study the kinetics of substrate (COD) and biomass (active methanogenic granule). In this work, simulations of lumped and distributed models are performed to observe the behavior of substrate and biomass inside the reactor. It is concluded that the suitable influent flow rate for UASB reactor is 150-175 m 3 /h, and the washed out biomass content is relatively low (from 0.001393 to 0.4919 kg/m 3). The steady-state condition is achieved from 2027 to 2533 days, with high COD removal.
Sugar extraction from sugarcane is a process which contains high volume of effluent, high levels of organic matter and biochemical oxygen demand (BOD). So, their disposal and discharge to rivers and environmental systems endangers the aquatic life. This research investigates and determines the kinetic coefficients of anaerobic treatment system (UASB) in sugarcane industrial wastewater treatment plant. BOD5, COD, and TSS parameters in the input and output effluent of reactor were measured and the kinetic coefficients of Kd, KS, Kmax, and µmax were calculated using modified Monod Equations by determining the system design and operating parameters. The experimental results showed that rate of KS, Y, Kd, µmax, and Kmax for application of UASB process in wastewater treatment of sugarcane factories was 506.4 mg/L, 0.053 g VSS/g COD, 0.086 d -1 , 0.0049 d -1 , and 0.055 d -1 , respectively. The kinetic coefficients obtained in this research can be used in management, operation, and preparation of design principles of similar sugarcane treatment plants particularly in topical areas.
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