The study of organic removal efficiency and halophilic bacterial mixed liquor characteristics in a membrane bioreactor treating hypersaline produced water at varying organic loading rates

A laboratory study was conducted to determine the feasibility of batch activated sludge reactor for treating pineapple wastewater and to examine the effects of bioaugmentation on treatment performance. The experimental set-up consists of eleven batch reactors. Activated sludge obtained from a wastewater treatment plant treating domestic wastewater was used as seed for the reactors. Synthetic pineapple wastewater was used as feed for the reactors. The eleven reactors were arranged to evaluate the total organic removal, nitrification, and sludge production by bioaugmentation process. Three major factors considered were influent organic loading, ammonia-nitrogen, and dosage of bacterial-culture-product addition. Removal of TOG (total organic carbon), sludge production in terms of SS(suspended solids), and ammonia-nitrogen removal variation are used as evaluation parameters. The TOC removal efficiency after the end of a 48 hour reactor run, for influent TOC of 350.14 to 363.30 mg/l, and 145.92 to 169.66 mg/l, was 94.41 to 95.89%, and 93.72 to 94.73% respectively. Higher organic removal was observed in the bioaugmented reactors with higher organic loading. The better organic removal efficiency in the bioaugmented reactors was probably due to activities of bacteria added. The test results also indicated that sludge yield was enhanced by the bacteria additive and high bacteria dosage produced less sludge. Bioaugmentation was observed to be a suitable alternative for enhancing the biological treatment of pineapple wastewater.

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Considering a membrane bioreactor for the treatment of vegetable oil refinery wastewaters at industrially relevant organic loading rates

Bioprocess and Biosystems Engineering ◽

10.1007/s00449-020-02294-9 ◽

2020 ◽

Vol 43 (6) ◽

pp. 981-995 ◽

Cited By ~ 1

Author(s):

Elham Abdollahzadeh Sharghi ◽

Azadeh Shourgashti ◽

Babak Bonakdarpour

Keyword(s):

Vegetable Oil ◽

Membrane Bioreactor ◽

Oil Refinery ◽

Organic Loading ◽

Loading Rates

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Process stability and microbial response of anaerobic membrane bioreactor treating high-strength kitchen waste slurry under different organic loading rates

International Biodeterioration & Biodegradation ◽

10.1016/j.ibiod.2017.03.012 ◽

2017 ◽

Vol 121 ◽

pp. 35-43 ◽

Cited By ~ 17

Author(s):

Xiaolan Xiao ◽

Wansheng Shi ◽

Zhenxing Huang ◽

Wenquan Ruan ◽

Hengfeng Miao ◽

...

Keyword(s):

Membrane Bioreactor ◽

High Strength ◽

Organic Loading ◽

Process Stability ◽

Kitchen Waste ◽

Loading Rates ◽

Anaerobic Membrane Bioreactor ◽

Microbial Response

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INFLUENCE OF ORGANIC LOADING AND MIXING TO THE STABILIZED LEACHATE COD REMOVAL USING CIRCULATING ANAEROBIC REACTOR

REAKTOR ◽

10.14710/reaktor.17.2.59-66 ◽

2017 ◽

Vol 17 (2) ◽

pp. 59

Author(s):

Aghasa Aghasa ◽

Qomarudin Helmy ◽

Mochammad Chaerul

Keyword(s):

Removal Efficiency ◽

Loading Rate ◽

Treatment System ◽

Organic Loading Rate ◽

Organic Loading ◽

Anaerobic Reactor ◽

Lagoon System ◽

Organic Removal ◽

Anaerobic Lagoon ◽

Pre Treatment

Abstract In Indonesia, several leachate treatments were operated with most of the treatments are using conventional anaerobic lagoon system in pre-treatment section. However, most of the treatments still have low organic removal efficiency. In several studies, removal efficiency could be increased through several modifications inside the pond and one of them is by using mixing addition. Therefore, the aim of this study was to compare leachate organic removal efficiency by using mixing and without using mixing modification. This research used 3 kinds of Circulating Anaerobic Reactor (CAR) where 0.5 kg/m3∙day Organic Loading Rate (OLR) in reactor-1 (with mixing) and reactor-3 (without mixing) and 1.0 kg/m3∙day OLR in reactor-2 (with mixing) were operated inside the reactor. From the results, the organic removal efficiency in reactor-1 was 81.82%, reactor-2 was 82.22%, and reactor-3 was 41.67%. It can be proven that leachate organic removal efficiency was possible to be increased with the addition of mixing inside the treatment system. Keywords: Circulating Anaerobic Reactor; leachate; mixing; organic loading; removal efficiency Abstrak PENGARUH BEBAN ORGANIK DAN PENGADUKAN TERHADAP PENYISIHAN COD LINDI TERSTABILISASI DENGAN MENGGUNAKAN CIRCULATING ANAEROBIC REACTOR. Di Indonesia, pengolahan lindi dioperasikan dengan sebagian besar pengolahan menggunakan sistem kolam anaerobik konvensional pada bagian pre-treatment. Akan tetapi, sebagian besar pengolahan masih memiliki penyisihan organik yang rendah. Dalam beberapa penelitian, efisiensi penyisihan dapat ditingkatkan melalui beberapa modifikasi di dalam kolam dan salah satunya adalah dengan menggunakan pengadukan. Oleh karena itu, tujuan dari penelitian ini adalah untuk membandingkan efisiensi penyisihan organik lindi dengan menggunakan pengadukan dan tanpa menggunakan pengadukan. Pada penelitian ini digunakan 3 jenis Circulating Anaerobic Reactor (CAR) dimana reaktor tersebut dioperasikan dengan Organic Loading Rate (OLR) sebesar 0,5 kg/m3∙hari di dalam reaktor-1 (dengan pengadukan) dan reaktor-3 (tanpa pengadukan) dan OLR sebesar 1,0 kg/m3∙hari dalam reaktor -2 (dengan pengadukan). Dari hasil penelitian, efisiensi penyisihan organik di dalam reaktor-1 adalah sebesar 81,82%, reaktor-2 sebesar 82,22%, dan reaktor-3 sebesar 41,67%. Melalui hal tersebut, dapat dibuktikan bahwa efisiensi penyisihan organik pada lindi memungkinkan untuk ditingkatkan dengan penambahan pengadukan di dalam sistem pengolahan. Kata kunci: Circulating Anaerobic Reactor; lindi; pengadukan; beban organic; efisiensi penyisihan

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Evaluation of anaerobic membrane bioreactor (AnMBR) treating confectionery wastewater at long-term operation under different organic loading rates: Performance and membrane fouling

Chemical Engineering Journal ◽

10.1016/j.cej.2020.126261 ◽

2021 ◽

Vol 404 ◽

pp. 126261 ◽

Cited By ~ 1

Author(s):

Gökhan Balcıoğlu ◽

Gulsum Yilmaz ◽

Z. Beril Gönder

Keyword(s):

Membrane Fouling ◽

Membrane Bioreactor ◽

Organic Loading ◽

Term Operation ◽

Loading Rates ◽

Anaerobic Membrane Bioreactor

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Application of combined membrane biological reactor and electro-oxidation processes for the treatment of landfill leachates

Water Science & Technology ◽

10.2166/wst.2009.377 ◽

2009 ◽

Vol 60 (3) ◽

pp. 605-614 ◽

Cited By ~ 24

Author(s):

Fathi Aloui ◽

Firas Fki ◽

Slim Loukil ◽

Sami Sayadi

Keyword(s):

Membrane Bioreactor ◽

Biological Process ◽

Ph Value ◽

Oxygen Demand ◽

Ammonia Nitrogen ◽

Optimum Conditions ◽

Organic Loading ◽

Landfill Leachates ◽

Loading Rates ◽

Electro Oxidation

Landfill leachate (LFL) is a very complex wastewater that poses considerable hazards to local communities and the environment. With this concern in mind, the present study was undertaken to investigate the performance of an aerobic membrane bioreactor treating raw LFL from Djebel Chekir (Tunisia) discharge. The LFL samples collected from this site were found to be highly loaded with organic matter, ammonia, salts, greases, phenols and hydrocarbons. Important removals of chemical oxygen demand (COD) and NH4+-N were attained after 44 days of treatment at optimum conditions for the membrane and with organic loading rates (OLR) of 1.9 and 2.7 grams COD per litter and day. This treatment allowed for an important detoxification of the landfill leachates and a significant elimination of the microorganisms. Electrochemical oxidation using Pi/Ti was applied as a post-treatment and after the biological process in order to reduce the residual ammonia and COD. At a pH value of 9, current density of 4 A dm−2 and electrolysis time of 60 minutes, COD and ammonia nitrogen were reduced to 1,000 mg L−1 and 27 mg L−1, respectively. COD and NH4+-N removals were accompanied by significant detoxification.

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