Influence of Organic Loading Rates (OLR) in Treatment of Pulp and Paper Mill Wastewater with Hybrid Upflow Anaerobic Sludge Blanket Reactor (HUASBR) with Hexagonal Polypropylene Inert Material

2018 ◽  
Vol 55 (1) ◽  
pp. 49-55
Author(s):  
D. Hemalatha ◽  
S. Keerthinarayana
Keyword(s):  
Paper Mill ◽  
Pulp And Paper ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Inert Material ◽  
Organic Loading ◽  
Pulp And Paper Mill ◽  
Loading Rates ◽  
Anaerobic Sludge Blanket ◽  
Paper Mill Wastewater

scholarly journals Bioenergy recovery from cattle wastewater in an UASB-AF hybrid reactor

2017 ◽  
Vol 76 (9) ◽  
pp. 2268-2279 ◽  
Author(s):  
Henrique Vieira de Mendonça ◽  
Jean Pierre Henry Balbaud Ometto ◽  
Marcelo Henrique Otenio ◽  
Alberto José Delgado dos Reis ◽  
Isabel Paula Ramos Marques
Keyword(s):  
Biogas Production ◽  
Upflow Anaerobic Sludge Blanket ◽  
Hybrid Reactor ◽  
Anaerobic Sludge ◽  
The Novel ◽  
Organic Loading ◽  
Loading Rates ◽  
Volatile Solids ◽  
Anaerobic Sludge Blanket

Abstract New data on biogas production and treatment of cattle wastewater were registered using an upflow anaerobic sludge blanket-anaerobic filter (UASB-AF) hybrid reactor under mesophilic temperature conditions (37 °C). The reactor was operated in semi-continuous mode with hydraulic retention times of 6, 5, 3 and 2 days and organic loading rates of 3.8, 4.6, 7.0 and 10.8 kg CODt m−3 d−1. Biogas volumes of 0.6–0.8 m3 m−3 d−1 (3.8–4.6 kg CODt m−3 d−1) and 1.2–1.4 m3 m−3 d−1 (7.0–10.8 kg CODt m−3 d−1), with methane concentrations between 69 and 75%, were attained. The removal of organic matter with values of 60–81% (CODt) and 51–75% (CODs) allowed methane yields of 0.155–0.183 m3 CH4 kg−1 CODt and 0.401–0.513 m3 CH4 kg−1 CODs to be obtained. Volatile solids were removed in 34 to 69%, with corresponding methane yields of 0.27 to 0.42 m3 CH4 kg−1 VSremoved. The good performance of the novel hybrid reactor was demonstrated by biogas outputs higher than reported previously in the literature, along with the quality of the gas obtained in the various experimental phases. The hybrid reactor investigated in this study presents comparative advantages, particularly in relation to conventional complete mixture units, considering economic factors such as energy consumption, reactor volume and installation area.

Start-Up Strategy to Achieve Excellent Efficiency of Degradation Acetate,Ethanol and Propionate in UASB

2011 ◽  
Vol 71-78 ◽  
pp. 2103-2106
Author(s):  
Ming Yue Zheng ◽  
Ming Xia Zheng ◽  
Kai Jun Wang ◽  
Hai Yan
Keyword(s):  
Loading Rate ◽  
Anaerobic Treatment ◽  
Upflow Anaerobic Sludge Blanket ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
Organic Loading ◽  
Metabolic Intermediate ◽  
Loading Rates ◽  
Start Up ◽  
Anaerobic Sludge Blanket

The performance of upflow anaerobic sludge blanket (UASB) fed with three metabolic intermediate (acetate, ethanol, and propionate) respectively was studied. The degradation of metabolic intermediate were investigated to discuss the reason for propionate inhibition problem in anaerobic treatment. The hydraulic retention time (HRT) in the reactors started with 8.0h.The yield rate of biogas were 237ml/gCOD, 242ml/gCOD, 218ml/gCOD for acetate, ethanol and propionate, respectively when finishing start-up under OLR of 5.0 kgCOD/(m3·d) (HRT=9.6h).The HRT remained constant 9.6h,and the substrate concentration was gradually increased from 1,000 to 16,000mg/L as COD,and the organic loading rates(OLR) was from 3.0 to 40.0 kgCOD/(m3·d).The maximum propionate concentration was 41.6 gHPr-COD/L at the organic loading rate of 43.9 kgCOD/(m3·d) (HRT, 9.6h) as well as acetate and ethanol.

Sludge Utilization and Reduction Experiences in the Pulp and Paper Industry

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2105-2108 ◽  
Author(s):  
I. Öztürk ◽  
V. Eroglu ◽  
A. Bastürk
Keyword(s):  
Energy Requirement ◽  
Paper Industry ◽  
Paper Mill ◽  
Pilot Scale ◽  
Pulp And Paper ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Pulp And Paper Mill ◽  
Biological Sludge ◽  
Study Results

This paper presents pilot-scale experiences on utilization of primary sludges from an integrated pulp and paper mill in the manufacturing of hardboard. The results have shown that the primary sludge added in 1/4 ratio yields the best result considering quality and operating aspects for the hardboard production. Lab-scale anaerobic treatability studies were carried out by an upflow anaerobic sludge blanket reactor (UASBR) with a volume of 10.351 using settled effluents from the related industry as the feed. Anaerobic treatability study results have shown that such an application prior to existing activated sludge system may provide 70 percent reduction in energy requirement for aeration and about 65 percent net reduction in excess biological sludge production.

Microbial community characterization of an UASB treating increased organic loading rates of vitamin C biosynthesis wastewater

2012 ◽  
Vol 65 (2) ◽  
pp. 254-261 ◽  
Author(s):  
Rongjiu Shi ◽  
Ying Zhang ◽  
Weichao Yang ◽  
Hui Xu
Keyword(s):  
Microbial Community ◽  
Vitamin C ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Organic Loading ◽  
Loading Rates ◽  
Gradient Gel Electrophoresis ◽  
Anaerobic Sludge Blanket

The microbial community of a mesophilic lab-scale upflow anaerobic sludge blanket (UASB) reactor treating vitamin C biosynthesis wastewater at gradually elevated organic loading rates (OLRs) was characterized using 16S rDNA-based polymerase chain reaction-DGGE (denatured gradient gel electrophoresis) analysis. The DGGE fingerprints suggested that the elevated OLRs did not cause any significant changes in the microbial community. The predominant bacterial bands were affiliated with the Firmicutes (Clostridiales, four bands), Proteobacteria (Deltaproteobacteria, six bands), Bacteroidetes, and Synergistetes, respectively. All the archaeal bands were very similar to already known methanogenic species: Methanobacterium formicicum (two bands), Methanomethylovorans hollandica (one band) and Methanosaeta concilli (two bands), which belonged to the divisions Methanobacteria and Methanomicrobia, respectively.

Effects of temperature and organic loading on the performance of upflow anaerobic sludge blanket reactors

1995 ◽  
Vol 22 (1) ◽  
pp. 143-149 ◽  
Author(s):  
Shannon Grant ◽  
Kwan-Chow Lin
Keyword(s):  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Organic Loading ◽  
Reactor Kinetics ◽  
State Process ◽  
Kinetic Coefficients ◽  
Reactor Temperature ◽  
Effects Of Temperature ◽  
Anaerobic Sludge Blanket ◽  
Steady State Process

A study investigating the effects of temperature and organic loading on the performance of upflow anaerobic sludge blanket reactors was carried out in the laboratory. Laboratory-scale reactors of 3.2 L volume were semicontinuously fed a synthetic substrate consisting of beef consommé and macro- and micro-nutrient compounds. Temperatures ranged from 10 to 42 °C; organic loadings ranged from 2.0 to 30 kg COD/(m3∙d). Steady-state process kinetics and efficiencies were evaluated for the various conditions. Based on the assumption that upflow anaerobic sludge blanket reactor kinetics in the temperature range of 10–30 °C could be approximated by Monod and modified Arrhenius equation relationships, effluent SCOD concentrations and removals were used to determine the maximum rate of substrate utilization, the half-velocity constant, and the temperature coefficient. A design and operating chart was constructed based on the kinetic coefficients determined from the experimental data. Key words: upflow anaerobic sludge blanket reactor, temperature, loading, performance, kinetics.

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