Synergistic Effect of Polymer Beads Used as Scraper and Different Aeration Intensities on Membrane Fouling

Bahar Yavuztürk Gül; İsmail Koyuncu

Makale detayları

Synergistic Effect of Polymer Beads Used as Scraper and Different Aeration Intensities on Membrane Fouling

Yazarlar:

Bahar Yavuztürk Gül | İsmail Koyuncu

Yayıncı:

Dokuz Eylul University

Ana Başlıklar:

Atık Yönetimi | Azaltma | Yeniden Kullanım ve Geri Dönüşüm

Dergi:

Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi Vol.25 Issue 75, pp.585-595

Belge Tipi:

Makale

Yayın Tarihi:

9/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001298683

pISSN:

1302-9304

Anahtar kelimeler:

Özet:

 One of the most important problems encountered during the operation of membrane bioreactors MBR is biofouling. The aim of this study is to determine the synergistic effect of low and high aeration intensity 150 Ls and 350 Ls and the use of beads on membrane biofouling. In order to solve this problem, polymer beads were produced and optimized to take advantage of the biofilm stripping effect. Three MBR operations were carried out with the selected beads at two different aeration densities. According to the optimization results, it was selected to use beads containing 12.5 polyvinyl alcohol PVA and 1 sodium alginate S.A and soaked in 5.5 boric acid-2 CaCl2 2 hours and 0.3 M phosphate solution 15 min. As a result of the 1st MBR operation with 350 Ls, the transmembrane pressure TMP was recorded as 280 mbar, while the TMP increased to 440 mbar at the end of the 2nd operation, in which the intensity of the aeration was reduced by half. According to 1st and 2nd MBR operations, membrane biofouling increased by 57 at low aeration intensity compared to high aeration intensity. The maximum transmembrane pressure TMP value was 350 mbar at the 3rd MBR operation, which was operated with the high air flow rate, and the module was used again after chemical washing. When the two operations under high aeration intencity were compared, the 25 increase in biofouling in the 3rd operation compared to the 1st one was evaluated as a result of irreversible fouling of the membrane module under high aeration conditions. For this reason, it is critical that the polymer beads exhibit an additional positive effect on biofilm prevention through membrane stripping properties even in low aeration conditions. The joint use of aeration intensities with polymer beads and their optimization according to the designed operating conditions will lead to an improvement in the control of membrane fouling and aeration costs.

 One of the most important problems encountered during the operation of membrane bioreactors MBR is biofouling. The aim of this study is to determine the synergistic effect of low and high aeration intensity 150 Ls and 350 Ls and the use of beads on membrane biofouling. In order to solve this problem, polymer beads were produced and optimized to take advantage of the biofilm stripping effect. Three MBR operations were carried out with the selected beads at two different aeration densities. According to the optimization results, it was selected to use beads containing 12.5 polyvinyl alcohol PVA and 1 sodium alginate S.A and soaked in 5.5 boric acid-2 CaCl2 2 hours and 0.3 M phosphate solution 15 min. As a result of the 1st MBR operation with 350 Ls, the transmembrane pressure TMP was recorded as 280 mbar, while the TMP increased to 440 mbar at the end of the 2nd operation, in which the intensity of the aeration was reduced by half. According to 1st and 2nd MBR operations, membrane biofouling increased by 57 at low aeration intensity compared to high aeration intensity. The maximum transmembrane pressure TMP value was 350 mbar at the 3rd MBR operation, which was operated with the high air flow rate, and the module was used again after chemical washing. When the two operations under high aeration intencity were compared, the 25 increase in biofouling in the 3rd operation compared to the 1st one was evaluated as a result of irreversible fouling of the membrane module under high aeration conditions. For this reason, it is critical that the polymer beads exhibit an additional positive effect on biofilm prevention through membrane stripping properties even in low aeration conditions. The joint use of aeration intensities with polymer beads and their optimization according to the designed operating conditions will lead to an improvement in the control of membrane fouling and aeration costs.

 One of the most important problems encountered during the operation of membrane bioreactors MBR is biofouling. The aim of this study is to determine the synergistic effect of low and high aeration intensity 150 Ls and 350 Ls and the use of beads on membrane biofouling. In order to solve this problem, polymer beads were produced and optimized to take advantage of the biofilm stripping effect. Three MBR operations were carried out with the selected beads at two different aeration densities. According to the optimization results, it was selected to use beads containing 12.5 polyvinyl alcohol PVA and 1 sodium alginate S.A and soaked in 5.5 boric acid-2 CaCl2 2 hours and 0.3 M phosphate solution 15 min. As a result of the 1st MBR operation with 350 Ls, the transmembrane pressure TMP was recorded as 280 mbar, while the TMP increased to 440 mbar at the end of the 2nd operation, in which the intensity of the aeration was reduced by half. According to 1st and 2nd MBR operations, membrane biofouling increased by 57 at low aeration intensity compared to high aeration intensity. The maximum transmembrane pressure TMP value was 350 mbar at the 3rd MBR operation, which was operated with the high air flow rate, and the module was used again after chemical washing. When the two operations under high aeration intencity were compared, the 25 increase in biofouling in the 3rd operation compared to the 1st one was evaluated as a result of irreversible fouling of the membrane module under high aeration conditions. For this reason, it is critical that the polymer beads exhibit an additional positive effect on biofilm prevention through membrane stripping properties even in low aeration conditions. The joint use of aeration intensities with polymer beads and their optimization according to the designed operating conditions will lead to an improvement in the control of membrane fouling and aeration costs.

 Membran biyoreaktörlerin MBR işletimi sırasında karşılaşılan en önemli problemlerden biri biyotıkanma sorunudur. Bu makalede düşük ve yüksek havalandırma yoğunluğunun 150 Ls ve 350 Ls ve boncuk kullanımının membran biyotıkanması üzerindeki sinerjistik etkisinin belirlenmesi amaçlanmıştır. Bu sorunun çözümüne yönelik olarak, öncelikle biyofilm sıyırıcı etkisinden faydalanmak amacıyla polimer boncukların üretimi ve optimizasyonu yapılmıştır. Seçilen boncuklar ile yüksek ve düşük iki farklı havalandırma yoğunluğunda üç reaktör işletmesi gerçekleştirilmiştir. Optimizasyon sonuçlarına göre 12,5 polivinil alkol PVA ve 1 sodyum aljinat S.A kullanılarak hazırlanan, 2 saat süre ile 5,5 borik asit-2 CaCl2 karışımında ve 15 dakika süre ile 0,3 M fosfat çözeltisi içerisinde bekletilen boncuklar seçilmiştir. 350 Ls ile yapılan 1. MBR işletmesi sonucunda transmembran basıncı TMP 280 mbar olarak kaydedilirken havalandırmanın yoğunluğunun yarıya düşürüldüğü ikinci işletme sonunda TMP 440 mbara yükselmiştir. Bu sonuçlara göre membran biyotıkanması, düşük havalandırma yoğunluğunda yüksek havalandırma yoğunluğuna göre 57 oranında artış göstermiştir. Kimyasal yıkama sonrası yüksek havalandırma koşulları ile 3. kez işletilen MBRda işletme sonunda maksimum TMP değeri 350 mbar olarak kaydedilmiştir. Yüksek havalandırma koşullarındaki iki işletme karşılaştırıldığında 1. işletmeye göre 3. işletme sonunda TMP değerinde gözlenen 25 artış membran modülünde meydana gelen geri dönüşümsüz tıkanmanın bir sonucu olarak değerlendirilmiştir. Bu nedenle polimer boncukların yüksek olmayan havalandırma koşulunda da ilave membran sıyırıcı özellikleriyle biyofilm önleme adına ek olumlu etki ortaya koyması kritik öneme sahiptir. Havalandırma koşulları ve polimer boncukların ortak kullanımı ve tasarlanan işletme koşullarına göre optimizasyonu biyotıkanmanın kontrol altına alınması ve havalandırma maliyetlerinde iyileşmeye neden olacaktır.

Makale detayları

Synergistic Effect of Polymer Beads Used as Scraper and Different Aeration Intensities on Membrane Fouling

Yazarlar:

Bahar Yavuztürk Gül | İsmail Koyuncu

Yayıncı:

Dokuz Eylul University

Ana Başlıklar:

Atık Yönetimi | Azaltma | Yeniden Kullanım ve Geri Dönüşüm

Dergi:

Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi Vol.25 Issue 75, pp.585-595

Belge Tipi:

Makale

Yayın Tarihi:

9/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001298683

pISSN:

1302-9304

Biofouling

MBR

aeration intensity

polymer beadsBiyotıkanma

MBR

havalandırma yoğunluğu

polimer boncuk

Sayı

Makale detayları

Yazarlar: Bahar Yavuztürk Gül | İsmail Koyuncu

Yayıncı: Dokuz Eylul University

Ana Başlıklar: Atık Yönetimi | Azaltma | Yeniden Kullanım ve Geri Dönüşüm

Dergi: Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi Vol.25 Issue 75, pp.585-595

Belge Tipi: Makale

Yayın Tarihi: 9/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001298683

pISSN: 1302-9304

Sayı

Yazarlar:

Bahar Yavuztürk Gül | İsmail Koyuncu

Yayıncı:

Dokuz Eylul University

Ana Başlıklar:

Atık Yönetimi | Azaltma | Yeniden Kullanım ve Geri Dönüşüm

Dergi:

Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi Vol.25 Issue 75, pp.585-595

Belge Tipi:

Makale

Yayın Tarihi:

9/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001298683

pISSN:

1302-9304