Field testing of polymeric mesh and ash-based ceramic membranes in a membrane bioreactor (MBR) for decentralised sewage treatment

This paper reports on a pilot trial of a novel MBR developed with coarse-pore membrane module by the authors. The plant was operated for 370 days with up to 7 m3/d raw saline sewage after 3-mm screening. The plant performed successfully without membrane fouling for 270 days except an accidental power source failure for 30 h, during which membrane was fouled under no aeration and mixing condition. EPS increases in both the reactor and the bio-cake on the membrane surface explained this fouling. The average TSS, COD and TKN removal efficiency were 92, 90, and 93%, respectively, under a high effective permeate flux of 4.8 m/d and a low air-to-water ratio of 15.

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Fate and transport of endocrine-disrupting compounds (oestrone and 17β-oestradiol) in a membranebio-reactor used for water re-use

Water Science & Technology ◽

10.2166/wst.2006.285 ◽

2006 ◽

Vol 53 (9) ◽

pp. 123-130 ◽

Cited By ~ 8

Author(s):

Seojin Chang ◽

Namjung Jang ◽

Younghyun Yeo ◽

In S. Kim

Keyword(s):

Membrane Filtration ◽

Membrane Bioreactor ◽

Wastewater Treatment Plants ◽

Sewage Treatment ◽

Fate And Transport ◽

Endocrine Disrupting Compounds ◽

Hollow Fibre ◽

Incomplete Removal ◽

Endocrine Disrupting ◽

Micro Pollutants

Oestrogens have been detected in the effluents of sewage treatment plants (STPs) in several countries, as well as in surface water. This occurrence is fundamentally attributed to the excretion of oestrogen from humans and mammalian bodies, and the incomplete removal of these compounds from wastewater treatment plants. These micro-pollutants are causing great concern when it comes to water re-use. There is a lack information on endocrine-disrupting compounds (EDCs) such as oestrogen in water re-use systems, e.g. a membrane bioreactor (MBR). It is clear that there is a strong need for “EDCs in MBR for water re-use”. This study examined an E1 and E2 biodegradation batch test by an activated sludge and hollow fibre membrane filtration test with and without a bio-cake. E2 was effectively removed, even in high initial concentrations (1,000 ppb). E2 was oxidised into E1, and E1 had a lower adsorption rate than E2. The membrane with the bio-cake provided better removal than the virgin membrane.

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Optimum Operation of a PVDF-type Hollow Fiber Membrane Bioreactor for Continuous Sewage Treatment

Journal of Environmental Science International ◽

10.5322/jes.2010.19.11.1315 ◽

2010 ◽

Vol 19 (11) ◽

pp. 1315-1322 ◽

Cited By ~ 1

Author(s):

Choon-Hwan Shin

Keyword(s):

Hollow Fiber ◽

Membrane Bioreactor ◽

Hollow Fiber Membrane ◽

Sewage Treatment ◽

Fiber Membrane ◽

Optimum Operation ◽

Hollow Fiber Membrane Bioreactor

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Performance evaluation and upgrade options for existing sequencing batch reactor for nutrient removal

MATEC Web of Conferences ◽

10.1051/matecconf/201926806007 ◽

2019 ◽

Vol 268 ◽

pp. 06007

Author(s):

Jahziel Lantin ◽

Jeremy Ynnos Abenoja ◽

Jason Ly ◽

Cheenee Marie Castillones ◽

Arnel Beltran ◽

...

Keyword(s):

Performance Evaluation ◽

Membrane Bioreactor ◽

Suspended Solids ◽

Sequencing Batch Reactor ◽

Batch Reactor ◽

Sewage Treatment ◽

Oxygen Demand ◽

Treatment Facility ◽

Study Results ◽

Hierarchy Process

Assessment and upgrade of existing sewage treatment plants (STPs) are necessary due to the revision of the existing effluent regulations which now monitors nutrients including ammonia, nitrate and phosphates. The aim of this study is the performance evaluation of four sequencing batch reactor (SBR) type of STP based on the following parameters: biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), nitrates, ammonia, phosphates and pH; and their potential upgrade based on the revised regulations stated in DAO 2016-08. Four sequencing batch reactor (SBR) type of STP were assessed for 12 weeks for this study. Results showed noncompliance with nutrient levels, thus upgrade is necessary. Analytical Hierarchy Process (AHP), a Multi-Criteria-Analysis (MCA) tool, was used to select the best option for upgrade among options that include (1) additional SBR tank, (2) diverting wastewater to another treatment facility, and (3) converting the SBR into membrane bioreactor (MBR). Considering the criterion for upgrade, option 2 was the most preferred decision followed by option 1 then option 3.

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Evaluation of four different coagulants used for chemical dephosphorization of membrane bioreactor effluent

E3S Web of Conferences ◽

10.1051/e3sconf/202016701009 ◽

2020 ◽

Vol 167 ◽

pp. 01009

Author(s):

Qin Cai ◽

Hui-qiang Li ◽

Ping Yang

Keyword(s):

Removal Efficiency ◽

Phosphorus Removal ◽

Continuous Flow ◽

Membrane Bioreactor ◽

Removal Rate ◽

Sewage Treatment ◽

Chemical Reactor ◽

Domestic Sewage ◽

Internal Loop ◽

Polyaluminium Chloride

A continuous flow chemical reactor was constructed to study the dephosphorization effect on the effluent of the oxygen-limited internal-loop fluidized membrane bioreactor (IF-MBR) for domestic sewage treatment. Removal effect of total phosphorus (TP) by four coagulants of AlCl3, FeCl3, polyaluminum ferric chloride (PAFC) and polyaluminium chloride (PAC) was evaluated. Results showed that when the ratio of coagulants to TP was 5 (coagulants in terms of Fe and Al), the removal efficiency of TP by FeCl3 was 92.5% and the addition of FeCl3 resulted in an increase in the chromaticity of the effluent. PAC and PAFC had good removal of TP, and the removal percentage achieved 96.2 and 97.4, respectively. However, the flocs they produced were small and light, and the performance in settlement was poor. AlCl3 performed well as a phosphorus removal agent, the removal rate of TP reached 97.4%, and the flocs were large and dense. Based on this, AlCl3 was the best choice for IF-MBR and then the experiment further optimized the Al/P ratio. Results showed that when the Al/P ratio was above 1:1, the effluent TP concentration was lower than 1mg/L; when the ratio was higher than 2.5:1, the effluent TP was lower than 0.5mg/L.

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