High rate anaerobic thermophilic technologies for distillery wastewater treatment

2005 ◽  
Vol 51 (1) ◽  
pp. 191-198 ◽  
Author(s):  
M. Pérez-García ◽  
L.I. Romero-García ◽  
R. Rodríguez-Cano ◽  
D. Sales-Márquez
Keyword(s):  
Fluidized Bed ◽  
Packed Bed ◽  
High Rate ◽  
Loading Rates ◽  
Sintered Glass ◽  
Stable Conditions ◽  
Fixed Film ◽  
Thermophilic Conditions ◽  
Distillery Wastewater ◽  
Film Reactor

In this paper, performance of two high rate technologies, upflow anaerobic fixed-film reactor and fluidized bed laboratory-scale, treating distillery wastewater (wine vinasses ) at anaerobic thermophilic conditions have been compared. The results obtained show that the stationary packed bed, with a corrugated plastic support, operated under stable conditions at organic loading rates (OLR0) around 20 kgCOD/m3/d, gives maximal total CODr of 76% at OLR0 of 6.29 kgCOD/m3/d; the fluidized bed reactor, operated on open pore sintered-glass media, gives total CODr of 96% at OLR0 of 5.88 kgCOD/m3/d. The anaerobic fluidized bed technology is more effective than the upflow anaerobic fixed-film technology due, fundamentally, to this technology favouring the transport of microbial cells from the bulk to the surface and enhancing the contact between the microorganism-substrate phases. In this sense, the stationary packed bed technology is adequate for the treatment of easily biodegradable wastewater, or for the cases where elevated percentages of CODr removal are not required, while the fluidized bed technology is especially suitable for treatment of hazardous wastes with recalcitrant compositions.

Effect of the pH influent conditions in fixed-film reactors for anaerobic thermophilic treatment of wine-distillery wastewater

2005 ◽  
Vol 51 (1) ◽  
pp. 183-189 ◽  
Author(s):  
M. Pérez-García ◽  
L.I. Romero-García ◽  
R. Rodríguez-Cano ◽  
D. Sales-Márquez
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Oxygen Demand ◽  
High Rate ◽  
Organic Load ◽  
Substrate Removal ◽  
Load Rate ◽  
Fixed Film ◽  
Thermophilic Conditions ◽  
Distillery Wastewater

In anaerobic treatments, the pH conditions affect the efficacy and operation of the process. The main purpose of this research is to compare the effect of the pH influent on the performance of a high rate technology at laboratory scale, upflow anaerobic fixed-film reactor, treating distillery wastewater (wine vinasses) in thermophilic conditions. The results obtained shown that the pH influent influences the performance of the biodegradation process: the depurative efficiency is higher for the operation with alkaline influent. The operation with acid influent allows us to operate at organic loading rates (OLR) around 5.6 kgCOD/m3/d (hydraulic retention time: 1.5 days), maintaining total Chemical Oxygen Demand removals (CODr) of 77.2%; the operation with alkaline influent allows total CODr of 76.8% working at OLR around 10.5 kgCOD/m3/d. The greatest efficiency of substrate removal was 87.5% for OLR 3.2 kgCOD/m3/d and hydraulic retention time of 4.0 days operating with alkaline influent. Therefore, the operation with alkaline influent implicates senior levels of purifying efficiency for similar organic load rate.

Hydrodynamics in the packed bed of the anaerobic fixed film reactor

1996 ◽  
Vol 33 (8) ◽  
pp. 1-6 ◽  
Author(s):  
H. Chua ◽  
J. P. C. Fung
Keyword(s):  
Dispersion Model ◽  
High Strength ◽  
Packed Bed ◽  
Effluent Treatment ◽  
Hydrodynamic Characteristics ◽  
Support Medium ◽  
Fixed Film ◽  
Film Reactor ◽  
Back Mixing ◽  
Intermediate Amount

The anaerobic fixed film reactors (AFFR), containing a mixed population of bacteria immobilized on the surfaces of expanded-clay support medium, have been successfully applied in the simulation of high-strength trade effluent treatment. This paper presents residence time distribution (RTD) studies to investigate the hydrodynamic characteristics in the packed bed of this novel type of reactor under the mixing effects of an effluent recycle stream. The results show that the flow pattern is characterized by various extents of back-mixing as predicted by the dispersion model. An effluent recycle at a rate equivalent to replacing the liquid content of the AFFR three times per hour achieved a large amount of dispersion in the packed bed. The AFFR without recycle had an intermediate amount of dispersion. This study shows that treatment performance of AFFRs and the cause of reactor failure are related to the effects of the effluent recycle in diluting and distributing the organic constituents of the trade effluent.

Fluidized-bed biofilms for chlorophenol mineralization

1995 ◽  
Vol 31 (1) ◽  
pp. 227-235 ◽  
Author(s):  
Jaakko A. Puhakka ◽  
Esa S. Melin ◽  
Kimmo T. Järvinen ◽  
Päivi M. Koro ◽  
Jukka A. Rintala ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Groundwater Remediation ◽  
Research Effort ◽  
Treatment Strategies ◽  
Sole Source ◽  
Pilot Scale ◽  
High Rate ◽  
Contaminated Groundwater ◽  
Groundwater Temperature ◽  
Loading Rates

This paper summarizes a five-year research effort on the development of a high-rate fluidized-bed biofilm system for remediation of chlorophenol contaminated groundwater. Laboratory-scale experiments with model compounds and actual contaminated groundwater included studies on aerobic and anoxic treatment, strategies for selective enrichment of chlorophenol degrading microorganisms, kinetics and stoichiometries of chlorophenol conversions, toxicity removal, growth and culture characterization, recovery from process upsets, and operation at suboptimal temperatures. The aerobic process using chlorophenols as the sole source of carbon and energy showed the greatest versatility and efficiency. The contaminated groundwater consisted of 2,3,4,6-tetrachlorophenol, 2,4,6-trichlorophenol and pentachlorophenol with total chlorophenol concentrations ranging from 45 to 55 mg/l. At room temperature, groundwater remediation resulted in over 99.9% mineralization at chlorophenol loading rates of 1000 mg/l/d and hydraulic retention times of less than 1h. At the groundwater temperature (7°C), similar removal efficiencies were obtained at chlorophenol loading rates of up to 740 mg/l/d. The laboratory results were successfully repeated in an on-site, pilot-scale demonstration.

Pemodelan Reaktor Hibrid Anaerob Pengolah Molasse Pada Pembebanan Organik Tinggi

2020 ◽  
Author(s):  
Gede H Cahyana
Keyword(s):  
Fluidized Bed ◽  
Fixed Bed ◽  
High Rate ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Expanded Bed ◽  
Anaerobic Sludge Blanket

Telah dikembangkan reaktor anaerob kecepatan tinggi (high rate) yang merupakan modifikasi reaktor konvensional. Di antaranya berupa (bio)reaktor pertumbuhan tersuspensi (contoh: UASB, Upflow Anaerobic Sludge Blanket) dan reaktor pertumbuhan lekat (Fixed Bed atau Biofilter, Fluidized Bed, Expanded Bed, Rotating Biodisc dan Baffled Reactor). Kedua tipe reaktor di atas memiliki sejumlah kelebihan dan kekurangan. Untuk mengoptimalkan nilai positifnya (terutama untuk keperluan desain) maka reaktor tersebut, pada penelitian ini, disusun menjadi satu urutan yang disebut Reaktor Hibrid Anaerob (Rehan) yakni UASB di bawah dan AF di atasnya. Lebih lanjut, penelitian ini diharapkan dapat memberikan informasi tentang kinerja Rehan dalam mengolah air limbah (substrat) yang konsentrasi zat organiknya (COD) sangat tinggi dan suatu model matematika yang dapat mewakili reaktor tersebut.

Sign in / Sign up

Export Citation Format

Share Document