Resiliency of anammox against external stress factors – Effects of temperature and wastewater constituents

Sha Wu, David G. Weissbrodt, Eberhard Morgenroth, Ramesh Goel

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Nitrogen r emoval based on anaerobic a mmonium oxidation (anammox) has g ained tremendous popularity as it is energy efficient and environmentally friendly. In this case, anammox is c oupled w ith p artial n itrification (collectively called p artial n itritation-anammox or P N/A systems) t o a ccomplish ne arly 80–90% t otal i norganic ni trogen removal. Despite s ignificant k nowledge gained ab out t he p rocess en gineering an d microbiology related to PN/A systems, very little is known about the effect of external perturbations on P N/A s ystems e specially in a s ystem b iology f ramework. I n this research w e first evaluated t he effects o f m etal an d t oxic l oading o n an en riched anammox community. Thereafter, we operated a single-stage PN/A lab-scale reactor to evaluate the effect of temperature on t he process efficiency and system microbiology. Mercury led to a 50% reduction and lead caused a 20% reduction in specific anammox activity a t 0.8 m g/L concentrations. Cyanide, used as a t oxic ch emical, caused significant anammox activity inhibition at 50 pp b concentration. The results related to temperature changes showed that ammonium oxidizing bacteria (Nitrosomonas sp.) can maintain a relatively stable activity at lower temperatures (13~21°C), while anammox bacteria (Candidatus Brocadia) are more sensitive to temperature reductions.

Original languageEnglish
Title of host publication88th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2015
PublisherWater Environment Federation
Pages1986-1993
Volume3
ISBN (Electronic)978-151087046-8
Publication statusPublished - 2015
Event88th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2015 - Chicago, United States
Duration: 26 Sep 201530 Sep 2015

Conference

Conference88th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2015
CountryUnited States
CityChicago
Period26/09/1530/09/15

Keywords

  • Anammox
  • Heavy metals
  • Nitrifying
  • Temperature
  • Toxic chemicals

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