Obrada otpadne vode iz konzerviranja ribe - učinak slanosti na aktivnost adaptiranog aktivnog mulja

undergraduate thesis

• Title (english): Fishcanning wastewater treatment - the effect of salinity on activitiy of adapted activated sludge
• Author: Marina Ugrina
• Mentor: Tibela Landeka Dragičević (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Engineering); (Laboratory for the Biological Waste Water Treatment); Zagreb
• Defense date and country: 2020-07-10, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

Učinak soli na učinkovitost uklanjanja organskih i anorganskih sastojaka iz otpadne vode iz procesa konzerviranja ribe istražen je u SBR-u procesom nitritacije/denitritacije pomoću aktivnog mulja adaptiranog na slanost. U pokusu obrade sintetske otpadne vode u kojem nije dodana sol postignuta je učinkovitost uklanjanja KPK 96%, NH₄-N 99% i PO₄-P 97%. S povećanjem slanosti narušava se kakvoća obrađene otpadne vode iz procesa konzerviranja ribe, u smislu uklanjanja C i N, te značajno u smislu uklanjanja P. Slanost se nije odražavala na proces denitritacije. U pokusima obrade otpadne vode iz konzerviranja ribe uz postupno povećanje slanosti od 15 g NaCl/L do 30 g NaCl/L uz povećanje slanosti od 2,5 g NaCl/L aktivni mulj je održavao stabilno visoku učinkovitost uklanjanja KPK> 96% i NH₄-N 98% (<20 g NaCl/L), odnosno 70% uklanjanje KPK i 64% uklanjanje NH4-N (20 g NaCl/L), a daljnje povećanje slanosti je imalo učinak na smanjenje učinkovitosti uklanjanja i KPK i NH₄-N. Postignuto je 63% uklanjanje PO₄-P pri 15 g NaCl/L, odnosno 25% uklanjanja PO₄-P pri 20 g NaCl/L, dok pri koncentraciji soli od ≥22,5 g NaCl/L do 30 g NaCl/L gotovo potpuno je narušeno uklanjanje PO₄-P.

Abstract (english)

The effect of salt on the efficiency of organic and inorganic compound removal from fish canning wastewater was investigated in SBR by the nitritation/denitritation process using activated sludge adapted to salinity. In the synthetic wastewater treatment experiment with no salt added, the removal efficiency of COD 96%, NH₄-N 99% and PO₄-P 97% was achieved. The quality of treated fish canning wastewater is disrupted, in terms of C and N removal, and significantly in term of P removal, with salinity increasing. Salinity was not affected in the denitritation process. Fish canning wastewater treatment with a gradual increasing of salinity (2,5 g NaCl/L) from 15 g NaCl/L to 30 g NaCl/L resulted in stable efficiency removal of > 96% COD and 98% NH₄-N (< 20 g NaCl/L), and 70% COD and 64% NH4-N removal at 20 g NaCl/L, and a further increase in salinity had the effect of reducing both COD and NH₄-N removal efficiency. Results for PO₄-P removal was 63% PO4-P removal at 15 g NaCl/L, 25% PO₄-P removal at 20 g NaCl/L, while at a salt concentration of ≥ 22,5 g NaCl/L to 30 g NaCl/L the removal of PO₄-P is disrupted almost completely.

• Keywords: otpadna voda iz procesa konzerviranja ribe; salinitet; uklanjanje C i N; nitritacija/denitritacija
• Keywords (english): fish canning wastewater; salinity; C and N removal; nitritation/denitritation
• Language: croatian
• URN:NBN: urn:nbn:hr:159:398049
• Study programme: Title: Biotechnology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-07-22 10:04:46