Anaerobic treatment of olive mill effluents

1997 ◽  
Vol 36 (2-3) ◽  
pp. 287-294 ◽  
Author(s):  
G. Ubay ◽  
I. Öztürk
Keyword(s):  
Retention Time ◽  
Anaerobic Treatment ◽  
Operating Conditions ◽  
Cod Removal ◽  
Upflow Anaerobic Sludge Blanket ◽  
Volume Index ◽  
Anaerobic Sludge ◽  
Substrate Removal ◽  
Anaerobic Sludge Blanket ◽  
Olive Mill

The anaerobic treatability of olive mill effluent was investigated using a laboratory scale upflow anaerobic sludge blanket reactor (UASBR) operated for about six months. The effects of various operating conditions including pH, feed strength and hydraulic retention time on the performance of the anaerobic treatment process were determined. In the first part of this study, the reactor was operated with feed COD concentrations from 5000 to 19,000 mg/l and a retention time of 1 day, giving organic loading rates from 5 to 18 kg COD/m3d. Soluble COD removal was around 75% under these conditions. In the second part of the study, feed CODs were varied from 15,000 to 22,600 mg/l while retention times ranged from 0.83 to 2 days; soluble COD removal was around 70%. A methane conversion rate of 0.35 m3 per kg COD removed was achieved during the study. The average volatile solids (VS) concentration in the reactor had increased from 12.75 g l−1 to 60 g l−1 by the end of the study. Sludge volume index (SVI) determinations performed to evaluate the settling characteristics of the anaerobic sludge in the reactor indicated excellent settleability with SVI values of generally less than 20 ml g−1. Sludge granules ranging from 3 to 8 mm in diameter were produced in the reactor. The second order substrate removal kinetics was applied by assuming that hydraulic conditions in the UASBR are approximately completely mixed and the model fitted well to the steady state operating results.

scholarly journals Pengolahan Limbah Industri Pengolahan Ikan Dengan Teknologi Gabungan Upflow Anaerobic Sludge Blanket (UASB)-Wetland

2019 ◽  
Vol 20 (1) ◽  
pp. 123
Author(s):  
Rustiana Yuliasni ◽  
Bekti Marlena ◽  
Syarifa Arum Kusumastuti ◽  
Cholid Syahroni
Keyword(s):  
Wastewater Treatment ◽  
Retention Time ◽  
Cod Removal ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Fish Processing ◽  
Integrated Technology ◽  
Anaerobic Sludge Blanket ◽  
Standard Regulation ◽  
Wwtp Design

ABSTRACTUpflow Anaerobic Sludge Blanket (UASB)-Wetland Integrated Technology was applied to treating fish-processing wastewater, taking into account for its simplicity, rapid and economical as well as its capability for reducing pollutant, so the effluent can fulfill effluent standard regulation. The research was carried out by the following steps: identification of wastewater characteristics, WWTP design and construction, and WWTP operational trials. The trials showed that UASB could remove COD average 72.3% and could achieve the highest COD removal of 95.42%, with retention time 24 hours.  Wetland could remove COD 52.9% on average and the highest COD removal was 78.22%. Simultaneously UASB-Wetland hybrid Technology could remove 86.25% COD on average, and the highest COD removal was 98.58%. Effluent has compiled the stream standard regulation and can be reused for fish farming.Keywords: fish processing wastewater, high organic wastewater treatment, integrated UASB-Wetland,  Anaerobic-Aerobic WWTPABSTRAKTeknologi gabungan Upflow Anaerobic Sludge Blanket (UASB) - wetland diaplikasikan untuk mengolah air limbah industri pengolahan ikan dengan pertimbangan bahwa teknologi ini murah dan mudah pengoperasiannya serta dapat mereduksi polutan sehingga kualitas effluent memenuhi syarat baku mutu.  Instalasi pengolahan limbah terdiri dari unit ekualisasi, UASB dan wetland. Hasil uji coba pengolahan dengan UASB menujukkan bahwa penurunan COD rata-rata 72,3% dengan persen penurunan tertinggi mencapai 95,42% dan penurunan COD dengan proses wetland rata-rata 52,9% dengan penurunan tertinggi mencapai 78,22%. Secara keseluruhan proses IPAL hibrid UASB-Wetland mampu menurunkan nilai COD rata-rata sebesar 86,25% dengan penurunan tertinggi mencapai 98,58%. Limbah terolah (effluent) sudah memenuhi baku mutu yang disyaratkan serta dapat dimanfaatkan kembali (reuse) sebagai sumber air untuk budidaya perikanan darat.Kata kunci: air limbah pengolahan ikan, pengolahan limbah organik tinggi, gabungan UASB-wetland, IPAL anaerobik-aerobik

scholarly journals Anaerobic Treatment of Dye Wastewater using Upflow Anaerobic Sludge Blanket Reactor

2019 ◽  
Vol 8 (12) ◽  
pp. 3178-3181
Keyword(s):  
Anaerobic Treatment ◽  
Cod Removal ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Textile Dye ◽  
Dye Wastewater ◽  
Study Results ◽  
Quality Water ◽  
Physicochemical Methods ◽  
Anaerobic Sludge Blanket

The textile dye wastewater removal in the environment is a greater problem by its harmful reasons. Dyes which obstruct the penetration of light leads to damage the quality and produce the poisonous effect in the aquatic ecosystem. Several studies were proved that the physicochemical methods were employed for treating the textile dye wastewater. Hence the biological processes are employed for treating the textile dye wastewater due to its cost effectiveness and less toxic effects. Bio filter can be an effective solution for producing high quality water and saving water for recirculation. In this article fujino spirals were mainly focusing as media in the reactor and operated at a hydraulic retention time (HRT) of 24h. The purpose of this study to analysis the overall performance of the UASBR which is achieved the maximum COD removal at 24hrs HRT respectively. From this study results, percentage of COD removal is directly related to the HRT. Hence the UASBR is suitable for treating real textile dye wastewater even upto 1000mg/l efficiency

Anaerobic treatment of natural tannin extracts in UASB reactors

2003 ◽  
Vol 48 (6) ◽  
pp. 157-163 ◽  
Author(s):  
J. López-Fiuza ◽  
F. Omil ◽  
R. Méndez
Keyword(s):  
Volatile Fatty Acids ◽  
Anaerobic Treatment ◽  
Cod Removal ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Tannin Extract ◽  
Aqueous Environments ◽  
Removal Efficiencies ◽  
Anaerobic Sludge Blanket ◽  
Uasb Reactors

Tannin extracts are substances commonly used in leather production processes. Since most of the steps of tannery manufacturing processes are carried out in aqueous environments, the presence of these compounds in the wastewaters is important. The aim of this work is to study the feasibility of the anaerobic degradation of three natural tannin extracts in three Upflow Anaerobic Sludge Blanket (UASB) reactors, which were fed with increasing concentrations of two condensed (quebracho and wattle) and one hydrolysable tannin extract (chestnut). Concentrations of applied extracts were 100, 200, 400, 800 and 1,000 mg/l, and 5 g/l of glucose was used as cosubstrate. Reactors were operated during 210 days and their performance was evaluated from the values of total and soluble COD, total and intermediate alkalinity, volatile fatty acids, pH and UV absorption at 280 nm. COD removal efficiencies higher than 85% were achieved in all cases. However, tannin extract removal efficiencies (based on UV-280 nm absorption measurements) were significantly lower, around 20% for condensed extracts and 60% for the hydrolysable one, when the reactors operated with the highest tannin extract concentration. The operation of the reactors was stable, commonly with alkalinity ratios below 0.30. Mass balances carried out indicate that most of the COD removal efficiencies are due to the removal of the readily biodegradable organic matter (glucose), whereas the tannin extracts are hardly anaerobically biodegradable, especially condensed extracts (wattle and quebracho).

Hybrid Upflow Anaerobic Sludge Blanket Reactor (HUASBR) Treatment of Dairy Effluents

1993 ◽  
Vol 28 (2) ◽  
pp. 77-85 ◽  
Author(s):  
I. Öztürk ◽  
V. Eroglu ◽  
G. Ubay ◽  
I. Demir
Keyword(s):  
Dairy Industry ◽  
Operating Conditions ◽  
Cod Removal ◽  
Laboratory Scale ◽  
Upflow Anaerobic Sludge Blanket ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
Anaerobic Reactor ◽  
Anaerobic Sludge Blanket ◽  
Dairy Effluents

This paper covers the treatability results of a laboratory-scale hybrid upflow anaerobic sludge blanket reactor (HUASBR) treating dairy effluents from a large integrated industry with a maximum production capacity of 500 tons of milk per day. The study began wilb the determination of effluent characteristics and pollution profile for the investigated dairy industry. As a result of observations, by-product recovery and waste reduction alternatives were investigated by in-plant control measures. Anaerobic treatability studies were conducted by a laboratory-scale hybrid upflow anaerobic reactor with an effective volume of 81. The reactor was operated more that 270 days under mesophilic conditions and it was fed wilb the combined effluents from the investigated dairy industry. The hydraulic retention times ranged from 0.21 to 0.96 days under normal operating conditions after the start up. COD removal efficiencies of more than 87% were achieved at an organic loading rate (OLR) of 8.5 kg COD/m3·d OLR was gradually increased from 2.54 to 7.1 kg COD/m3·d within 15 days but the anaerobic reactor performances did not change significantly. The reactor was operated under varying feed characteristics to test the response of the system to high strength acid whey. The system can tolerate OLRs as high as 17 kg COD/m3·d with an average COD removal efficiency of 75% for two weeks. Although the reactor was fed by diluted effluent with an average COD of 1070 mg/l at very high hydraulic loadings (HRT=5 hours), 75% removals of COD were achieved under these conditions.

KINETIC MODELS FOR PREDICTION OF COD EFFLUENT FROM UPFLOW ANAEROBIC SLUDGE BLANKET (UASB) REACTOR FOR CANNERY SEAFOOD WASTEWATER TREATMENT

2016 ◽  
Vol 78 (5-6) ◽  
Author(s):  
Sunwanee Jijai ◽  
Chairat Siripatana ◽  
Sompong O-Thong ◽  
Norli Ismail
Keyword(s):  
Palm Oil ◽  
Kinetic Models ◽  
Second Order ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Substrate Removal ◽  
Reactor Kinetic ◽  
Palm Oil Mill ◽  
Anaerobic Sludge Blanket

The three identical lab-scale upflow anaerobic sludge blanket (UASB) reactors were operated continuously for treating cannery seafood wastewater at seven hydraulic retention times (HRTs) of 5, 4, 3, 2, 1, 0.5 and 0.25 days. The different of granule sizes from three sources: a cassava factory (CS), a seafood factory (SS), and a palm oil mill (PS), average sizes in the range 1.5-1.7, 0.7-1.0 and 0.1-0.2 mm respectively were used as inocula for anaerobic digestion. The UASB-R1 used only granules from seafood factory (R1-SS), the UASB-R2 used mixed granules from seafood with cassava factory (R2-SS+CS) and the UASB-R3 used mixed granules from seafood factory with palm oil mill (R3-SS+PS). In this study selected mathematical models including Monod, Contois, Grau second-order and modified Stover-Kicannon kinetic models were applied to determine the substrate removal kinetics of UASB reactor. Kinetic parameters were determined through linear regression using experimental data obtained from the steady-state experiment and subsequently used to predict effluent COD. The results showed that Grau second-order and modified Stover-Kicannon kinetic models were more suitable than that of others for predicting the effluent COD, with high the correlation coefficient (R2). In addition, the UASB-R2 from mixed granules with cassava factory (SS+CS) gave the best performance and highest coefficient value.

Anaerobic treatment of proteinaceous wastewater under mesophilic and thermophilic conditions

1999 ◽  
Vol 40 (1) ◽  
pp. 77-84 ◽  
Author(s):  
H. H. P. Fang ◽  
D. Wai-Chung Chung
Keyword(s):  
Bacterial Species ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Loading Rates ◽  
Batch Tests ◽  
Thermophilic Conditions ◽  
Anaerobic Sludge Blanket ◽  
Hydrolysis Of

Experiments were conducted in two 2.8 liter UASB (upflow anaerobic sludge blanket) reactors treating proteinaceous wastewaters at 37° and 55°C with 9 hours of hydraulic retention. Results showed that the mesophilic reactor consistently removed 83.5-85.1% of COD (chemical oxygen demand) at loading rates ranging 8-22 g COD l−1 d−1 (corresponding to 3000-8250 mg l−1 of proteinaceous COD in wastewater), whereas the thermophilic reactor removed only 68.5-82.7%. At 32 g COD l−1 d−1 (i.e. 12000 mg COD l−1), the removal efficiencies were lowered to 75.7% in the mesophilic reactor and 65.1% in the thermophilic reactor. At 42 g COD l−1 d−1, severe sludge washout occurred in the mesophilic reactor; at the same loading rate, the thermophilic reactor removed only 53.8% of COD even though sludge washout was under control. The degradation rate in the both reactors was limited by the initial hydrolysis of proteins. However, batch tests showed that thermophilic sludge had slightly higher methanogenic activities than mesophilic sludge in treating proteins and intermediate acids, except propionate. The sludge yields in mesophilic and thermophilic reactors were 0.066 and 0.099 g VSS g COD−1, respectively. Observations by scanning electron microscopy indicated that both types of sludge granules were of irregular shape. There was little noticeable difference between the two granules; both had neither a layered microstructure nor a predominant bacterial species.

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