Biyodizel Atıksularında MeOH ve KOİ Gideriminin Elektrokoagülasyon Yöntemi İle Arıtımı

Yıl 2018, Cilt: 22 Sayı: 2, 600 - 606, 01.04.2018

Pınar Tanatti , Ayhan Şengil , Halil Aksu Meryem Mehmetbaşoğlu Büşra Erden

https://doi.org/10.16984/saufenbilder.330946

Öz

 Biyodizel atıksuları çok miktarda yağ, metanol, sabun ve
gliserin içermektedir. Bu atıksuların KOİ değeri 250 000- 450 000 mg/L, TOK 54
000- 110 000 mg/L, gliserin 800-1500 mg/L ve metanol 6 000- 15 000 mg/L
arasında değişmektedir. Atıksudaki yağ içeriği ise 15 000 mg/L kadar yüksek
olabilmektedir. Bu nedenle biyodizel atıksuları, yağ-
drenaj sistemlerin tıkanmasına, biyolojik arıtma sistemlerinde biyolojik
aktivitenin azalmasına sebep olmaktadır. Bu çalışmanın ana amacı, laboratuvar
ölçeğinde çalışmalar yaparak esterifikasyon yöntemiyle üretilen biyodizel
yıkama sularının arıtılabilirliğinin incelenmesidir. Bu çalışmada, biyodizel
atıksuyunun elektrokoagülasyon yöntemi ile arıtımı kesikli bir reaktörde
incelenmiştir. EC prosesinde, başlangıç atıksu pH değeri 6, tuz miktarı 0,5
g/L, akım yoğunluğu 0,7 mA/cm² ve elektroliz süresi 2 dakika
belirlenmiştir. 2 dakikalık elektrokogülasyon prosesi sonucunda %64,2 MeOH
ve %95,8 KOİ
giderme verimleri elde edilmiştir. Bu sonuçlara göre MeOH ve KOİ gideriminde
işletme boyunca elektrokoagülasyon yöntemi daha yüksek miktarda MeOH ve KOİ
giderimi sağlanmaktadır.

Anahtar Kelimeler

Elektrokoagülasyon, Biyodizel atıksuyu, metanol

Treatment of MeOH and COD removal in biodiesel wastewaters by electrocoagulation

Öz

The
main components of the wastewater are the residual remaining oil, methanol,
glycerol, soap. In general, wastewater from the biodiesel processing industry
contains high concentrations of COD, TOC, Glycerol, methanol and oil and/or
grease such as 250 000- 450 000 mg L^-1, 54 000- 110 000 mg L^-1
, 800-1500 mg L^-1  , 6 000- 15
000 mg L^-1  and 15 000 mg L^-1,
respectively. In this respect, biodiesel wastewater should not be discharged
into public drainage because the oil causes clogging of the drainage and
decreases biological activity in sewage treatment. The
initial aim of this study is, investigation of, treatability of the biodiesel
washing water, maintained by the esterification process with fulfillmentlaboratory
scale studies. In
this study, the treatment of biodiesel wastewater by electrocoagulation was
investigated carried out in a batch reactor. Removal efficiencies for 64.2% of
MeOH and 95.8% KOİ were obtained at wastewater inital pH 6, NaCl dose 0.5 g/L,
current density of 0.7 mA/cm² and 2 min of operating time. According
to these results, MeOH and COD removal are provided by the electrocoagulation
method during operation at a higher amount of MeOH and COD removal.

Anahtar Kelimeler

Electrocoagulation, Biodiesel wastewater, Methanol

Kaynakça

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