Implementation of Fenton process on wastewater from a cheese-making factory

Abstract

In this work, the performance of Fenton oxidation on whey, the high strength fraction of cheese-dairy wastewater, was studied. For this reason, factorial experimental design was used to study the main variables affecting the Fenton process, as well as their interactions. A 2 4 factorial design was performed in order to estimate the effects of the following parameters: the ratio FeSO 4 ·7H 2 O/H 2 O 2 (X 1 ), the hydraulic retention time (X 2 ), the pH (X 3 ), and the temperature (X 4 ). The oxidation was carried out batch wise in an agitated, temperature-and pH-controlled glass reactor. At the end of the experiment, samples were taken from the effluent of the reactor and were analyzed in terms of COD, TOC, total Kjeldahl Nitrogen (TKN), total phosphorous, and fats and oils. The highest percentage of TOC efficiency measured was 33% in the experimental point (X 1 , X 2 , X 3 , X 4 ) = (2/3, 1, 3.4, 20). Concentration of fats presented high reduction that reached 57%. Phosphorous removal was also high in all experiments, while nitrogen removal did not have high fluctuations. The results from the statistical processing of the experimental data enlightened the oxidation mechanism.

A review on fermentative hydrogen production from dairy industry wastewater

“…The organic content of dairy wastewaters is typically in the range of 1 to 10 g COD L −1 and 0.3 to 5.9 g BOD 5 L −1 while seasonal variations are correlated with the volume of milk received for processing . Whey wastewater is a by‐product of the cheese‐making process with a high content of lactose, soluble proteins, lipids and mineral salts along with COD concentrations up to 80 g L −1 and it is an ideal source for bioenergy production with its high biodegradability . Low concentrations of some heavy metals also have been reported in dairy wastewater …”

Παραγωγή Ενέργειας Από Υγρά Απόβλητα Τυροκομείων

“…5.2 ΕΠΕΞΕΡΓΑΣΙΑ & ΣΥΖΗΤΗΣΗ ΑΠΟΤΕΛΕΣΜΑΤΩΝ5.2.1 Επεξεργασία & Συζήτηση αποτελεσμάτων χημικής οξείδωσης FentonΟ Πίνακας 5.5 συνοψίζει τα αποτελέσματα του παραγοντικού πειράματος, εκφρασμένα ως προς την ποσοστιαία απομείωση των μεταβλητών απόκρισης (TOC, COD, TKN, TP και λίπη) στον προεπεξεργασμένο ορρό, σε σχέση με τις τιμές που μετρήθηκαν αρχικά.Πίνακας 5.5: % απομείωση των μεταβλητών απόκρισης του παραγοντικού πειράματοςΑπό τα παραπάνω δεδομένα, κατασκευάστηκε μαθηματικό μοντέλο για κάθε μία από τις μεταβλητές απόκρισης(403). Η επάρκειά του ελέγχθηκε με βάση το κριτήριο Fisher (βλ.…”