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Assessing the feasibility of achieving biological nutrient removal from wastewater at an Irish food processing factory

journal contribution
posted on 2023-11-02, 03:46 authored by D Mulkerrins, E O'Connor, B Lawlee, P Barton, A Dobson
In Ireland, wastewaters emanating from the food industry typically contain elevated levels of nitrogen and phosphorus before treatment. Two pilot scale studies were performed to determine the feasibility of achieving biological N and P removal on-site at a food ingredients plant. The wastewater treated by the pilot reactors was that which resulted from the day-to-day production in the full-scale food ingredients plant. Both reactors were of the anaerobic/anoxic/oxic (A/A/O) design, however the sizing of the zones was varied in this study. In the first pilot study, while treating a wastewater of the following strength: 1008 mg COD/l; 30.1 mg NH4-N/l and 26.7 mg P/l, removal efficiencies of 93%, 99% and 98% were obtained for COD, NH4-N and P, respectively. In the second study, while operating at reduced hydraulic retention times and lower recycle rates, the pilot plant treated a wastewater of the following strength: 1757 mg COD/l; 62 mg NH4-N/l and 57 mg P/l, with removal efficiencies of 94%, 97% and 75% obtained for COD, NH4-N and P, respectively. This work showed that biological nutrient removal could be successfully applied to treatment of food industry wastewaters.

History

Journal

BIORESOURCE TECHNOLOGY

Volume

91

Pagination

207-214

Location

England

ISSN

0960-8524

eISSN

1873-2976

Language

English

Issue

2

Publisher

ELSEVIER SCI LTD