Integration of chemical and biological oxidation in a SBBR for tannery wastewater treatment

2004 ◽  
Vol 50 (10) ◽  
pp. 107-114 ◽  
Author(s):  
C. Di Iaconi ◽  
F. Bonemazzi ◽  
A. Lopez ◽  
R. Ramadori
Keyword(s):  
Wastewater Treatment ◽  
Chemical Oxidation ◽  
Biofilm Reactor ◽  
Flow Dynamics ◽  
Laboratory Scale ◽  
Tannery Wastewater ◽  
Biological Degradation ◽  
Bed Porosity ◽  
Sequencing Batch Biofilm Reactor ◽  
Innovative Process

This paper reports the results of an investigation aimed at evaluating the laboratory-scale performance of an innovative process for treating tannery wastewater. In this process, biological degradation, carried out in a sequencing batch biofilm reactor (SBBR), is combined with chemical oxidation by ozone. Tannery wastewater treatment was carried out, at laboratory scale, on a real primary effluent coming from a centralised plant treating wastewater produced by a large tannery district in Northern Italy. SBBR performance both without and with ozonation, was assessed with very satisfactory results. In particular, in the latter instance the recorded COD, TKN and TSS average removals, (96%), (92%) and (98%) respectively, allowed the maximum allowable concentration values fixed by the Italian regulation in force to be achieved without any additional polishing step. During the investigation biofilm properties (biofilm concentration and biofilm density) and flow dynamics aspects (head loss, shear stress, bed porosity) were also studied. A major feature of the process is that, with or without ozonation, it was characterised by very low specific sludge production (0.05 kgVSS/kgCODremoved) and high biofilm density (i.e. 87-122 gVSS/Lsludge) both contributing to a rather high biofilm concentration (i.e. 31-44 gTSS/Lfilter).

Tannery Wastewater Treatment by Sequencing Batch Biofilm Reactor

2003 ◽  
Vol 37 (14) ◽  
pp. 3199-3205 ◽  
Author(s):  
C. Di Iaconi ◽  
A. Lopez ◽  
R. Ramadori ◽  
R. Passino
Keyword(s):  
Wastewater Treatment ◽  
Biofilm Reactor ◽  
Tannery Wastewater ◽  
Sequencing Batch Biofilm Reactor

Experimental study on sequencing batch biofilm reactor with biological filtration (SBBR-BF) for wastewater treatment

2004 ◽  
Vol 48 (11-12) ◽  
pp. 299-307 ◽  
Author(s):  
T.W. Li ◽  
Y.Z. Peng ◽  
Y.Y. Wang ◽  
G.B. Zhu ◽  
W.Q. Chi ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Laboratory Experiment ◽  
Wastewater Treatment Plants ◽  
Domestic Wastewater ◽  
Biofilm Reactor ◽  
Treatment Technology ◽  
Biological Filtration ◽  
Efficient System ◽  
Filtration Cycle ◽  
Sequencing Batch Biofilm Reactor

A novel wastewater treatment technology combining a sequencing batch biofilm reactor and biological filtration in an SBBR-BF system was presented. Elastic plastic filaments were fixed as biofilms carrying media. Particle materials (sand or anthracite) and the settled sludge constituted the filtration layer. In the laboratory studies, operating results of SBR, SBBR and SBBR-BF were compared. Better quality and stable water quality of effluent could be achieved in SBBR-BF because the fixed film and filtration layer were added in the reactor. Other laboratory experiment results indicated that slow filtration, cycle water stirring and backwashing making use of the settled supernatant are successful methods for preventing clogging and saving energy. The velocity and headloss of filtration were significantly impacted by different MLSS concentration. The MLSS concentration in the reactor must be less than 1,400 mg/L for optimal results. The average velocity of filtration ranging from 0.6 to 1.0 m/h, the backwash velocity of 10–15 m/h and the backwash time of 20 seconds are recommended according to the laboratory experiment. On-site experiment and study showed that SBBR-BF is a stable and efficient system for domestic wastewater treatment, and is particularly suited for small wastewater treatment plants, because of the simple operation and compact installation.

Anaerobic sequencing batch biofilm reactor applied to automobile industry wastewater treatment: Volumetric loading rate and feed strategy effects

2008 ◽  
Vol 47 (8) ◽  
pp. 1374-1383 ◽  
Author(s):  
Ricardo Polisaitis Oliveira ◽  
José Antonio Ghilardi ◽  
Suzana Maria Ratusznei ◽  
José Alberto Domingues Rodrigues ◽  
Marcelo Zaiat ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Automobile Industry ◽  
Loading Rate ◽  
Biofilm Reactor ◽  
Sequencing Batch Biofilm Reactor ◽  
Feed Strategy ◽  
Volumetric Loading ◽  
Industry Wastewater

Shock loading management with the sequencing batch biofilm reactor technology

1997 ◽  
Vol 35 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Hans-Peter Kaballo
Keyword(s):  
Shock Loading ◽  
Organic Pollutant ◽  
Operation Mode ◽  
Substrate Inhibition ◽  
Elimination Rate ◽  
Kinetic Studies ◽  
Biofilm Reactor ◽  
Biological Degradation ◽  
Bulk Fluid ◽  
Sequencing Batch Biofilm Reactor

This paper presents one performance of SBBRs to treat wastewater containing the priority organic pollutant para-chlorophenol (p-CP). Batch kinetic studies showed that the biological degradation of p-CP can be described with the model of the substrate inhibition analogue Haldane. The following parameters were found: Ks = 4.4 mg L−1, Ki = 60 mg L−1, rmax = 3.24 h−1. With this information the operation mode of a sequencing batch biofilm reactor was optimized when shock loading appeared. During a short fill of 12 minutes approximately 30 % of the influent amount was eliminated of the bulk. It is assumed that other effects than biodegradation were responsible for this, i.e. biosorption. During the reaction phase the turbulence had an important influence to the elimination rate. At a bulk fluid concentration of more than 60 mg L−1 the elimination process was controlled by microbial kinetics. But with decreasing concentration the mass transfer became more important. The elimination rate could be increased from 7.3 mg L h−1 to 26.3 mg L h−1 with a 5-fold higher air flow rate.

Full-scale anaerobic sequencing batch biofilm reactor for sulfate-rich wastewater treatment

2011 ◽  
Vol 25 (1-3) ◽  
pp. 13-19 ◽  
Author(s):  
Arnaldo Sarti ◽  
Ariovaldo J. Silva ◽  
Marcelo Zaiat ◽  
Eugenio Foresti
Keyword(s):  
Wastewater Treatment ◽  
Full Scale ◽  
Biofilm Reactor ◽  
Sequencing Batch Biofilm Reactor

scholarly journals Application of a moving-bed biofilm reactor for sulfur-oxidizing autotrophic denitrification

2017 ◽  
Vol 77 (4) ◽  
pp. 1027-1034 ◽  
Author(s):  
Yan-Xiang Cui ◽  
Di Wu ◽  
Hamish R. Mackey ◽  
Ho-Kwong Chui ◽  
Guang-Hao Chen
Keyword(s):  
Wastewater Treatment ◽  
Steady State ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Biofilm Reactor ◽  
Laboratory Scale ◽  
Autotrophic Denitrification ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Sulfur Oxidizing

Abstract Sulfur-oxidizing autotrophic denitrification (SO-AD) was investigated in a laboratory-scale moving-bed biofilm reactor (MBBR) at a sewage temperature of 22 °C. A synthetic wastewater with nitrate, sulfide and thiosulfate was fed into the MBBR. After 20 days' acclimation, the reduced sulfur compounds were completely oxidized and nitrogen removal efficiency achieved up to 82%. The operation proceeded to examine the denitrification by decreasing hydraulic retention time (HRT) from 12 to 4 h in stages. At steady state, this laboratory-scale SO-AD MBBR achieved the nitrogen removal efficiency of 94% at the volumetric loading rate of 0.18 kg N·(mreactor3·d)−1. The biofilm formation was examined periodically: the attached volatile solids (AVS) gradually increased corresponding to the decrease of HRT and stabilized at about 1,300 mg AVS·Lreactor−1 at steady state. This study demonstrated that without adding external organic carbon, SO-AD can be successfully applied in moving-bed carriers. The application of SO-AD MBBR has shown the potential for sulfur-containing industrial wastewater treatment, brackish wastewater treatment and the upgrading of the activated sludge system. Moreover, the study provides direct design information for the full-scale MBBR application of the sulfur-cycle based SANI process.

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