Phosphorus recovery from aerobic membrane bioreactor effluent using purolite A500 resin and chemical precipitation

การนำฟอสฟอรัสกลับมาใช้ใหม่จากน้ำทิ้งของระบบถังปฏิกรณ์ชีวภาพเมมเบรนแอโรบิกด้วยเรซินโพลูไลท์ เอ500 และกระบวนการตกตะกอนทางเคมี

Name: Suttipong Singhyakaew

Classification :.DDC: 628.1683

LCSH: Sewage -- Purification

LCSH: Phosphorus

LCSH: Water -- Phosphorus content

LCSH: Bioreactors

Abstract: Removal of phosphorus was investigated using an aerobic membrane bioreactor (AMBR) with ion-exchange as a post-treatment. The MBR was operated at flux 10 LMH with a 0.66 liter aerobic MBR unit. Specific amounts of soil flushing liquid containing diesel and surfactant were added to the synthetic wastewater at different periods of time. The organic and phosphorus removal performances of AMBR were investigated by comparing the results before and after adding diesel oil-degrading bacteria. This study revealed the feasibility of diesel-contaminated soil flushing liquid treatment using MBR as well as the protocol of phosphorus recovery from MBR permeate. The results showed that a stable COD removal up to 98.5% was observed after adding bacteria while the step-wise concentration increase of diesel-surfactant flushing liquid in feed water was carried out. Phosphorus was removed from permeate using Purolite A500 resin through batch experiments. The result found that the adsorption isotherm satisfactorily fitted to both the Langmuir and Freundlich adsorption models determined by R2 that ranges from 0.9571 to 0.9943 and 0.9471 to 0.9877, respectively. However, Langmuir model fitted better with the experimental data slightly than the Freundlich model. The maximum value of adsorbed monolayer capacity was 4.21 mg per gram of Purolite at pH 9 with 1.2 g resin/L. Extraction of phosphorus was effectively desorbed using a solution containing 3% (w/v) NaCl solution in the batch experiments. Percentage of phosphorus extraction were found the same value considering the regeneration time and at the presence of NaOH can extract phosphorus faster than the absence of NaOH condition by 1.25 times. Desorbed phosphorus was recovered by precipitation process using CaCl2, the highest efficiency obtained was 96.71 % at 0.025 M CaCl2 and pH 11.

Chiang Mai University Library

Address: CHIANG MAI

Email: cmulibref@cmu.ac.th

Name: Patiroop Pholchan

Role: Chairman

Name: Supapong Wattanachira

Role: Member

Name: Patiparn Punyalakul

Role: Member

Name: Sirichai Koonaphapdeelert

Role: Member

Created: 2016

Modified: 2019-12-23

Issued: 2019-12-23

วิทยานิพนธ์/Thesis

application/pdf

CallNumber: Th 628.1683 S967P

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Environmental Engineering

Grantor: Chiang Mai University

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