Microbial growth depending on organic loading rate at the anaerobic biofilm processes

Year 2016, Volume: 5 Issue: 1, 41 - 46, 01.03.2016

Hakki Gülşen

Abstract

In this study, microbial growth depending on organic loading rate and treatability of leachate from Odayeri Sanitary Landfill located on the European part of Istanbul was investigated in an anaerobic fluidized bed reactor AFBR . The experiments have been performed in a pilot-scale fluidized bed reactor having an inner diameter of 10 cm, a height of 165 cm and an effective volume of 13 l. The reactor media was typical filter sand having an arithmetic mean diameter of 0.5 mm and a fixed bed height of 70 cm. The AFBR experiments were carried out by increasing the organic loading rate OLR from 2 to 37 kg COD/m3.day at the hydraulic retention time HRT 1 day. The mean attached biomass concentration also increased up to 21,25kgAVSS/m3 for the original landfill leachate OLR=20 kgCOD/m3.day and the biomass transformation rate Y is 0,57 gVSSatt/gCODrem.day

Keywords

Anaerobic fluidized bed reactor, Organic loading rate, Biofilm, Yield rate

Anaerobik biyofilm proseslerde organik yüklemeye bağlı mikrobiyal büyüme ve gelişim

Abstract

Bu çalışmada, İstanbul Avrupa yakası, Kemerburgaz Odayeri katı atık düzenli depolama alanı sızıntı sularının anaerobik akışkan yataklı reaktörde AAYR arıtılmasında organik yüklemeye bağlı biyofilm oluşumu ve gelişimi araştırılmıştır. Bu amaçla laboratuvar ölçekli bir anaerobik akışkan yataklı reaktör kurulmuştur. Çalışmanın yapıldığı akışkan yataklı reaktörün çapı 10 cm, yüksekliği 165 cm, etkili hacmi 13 litre olup yatak malzemesi olarak 0,5 mm’ lik filtre kumu kullanılmış ve sabit yatak yüksekliği 70 cm’ dir. Yapılan çalışmada AAYR, organik yükleme OLR 4–37 kgKOİ/m3.gün aralığında ve hidrolik bekletme süresi 1 gün olarak işletilmiştir. Orijinal hacimsel organik yükleme 20 kg KOİ/m3.gün iken yapılan biyofilm çalışmalarında tutunmuş biyokütle konsantrasyonu ortalama 21,25kg/m3 ve biyokütleye dönüşüm oranı Y 0,57 gUAKMtut/gKOİgid.gün olarak bulunmuştur

Keywords

Anaerobik akışkan yataklı reaktör, Organik yükleme, Biyofilm, Dönüşüm oranı

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