Simultaneous carbon and nitrogen removal with enhanced bioparticle circulation in a Circulating Fluidized Bed Biofilm Reactor

Ming Li, George Nakhla, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

23 Citations (Scopus)

Abstract

This paper presents a novel bioparticle system operated for simultaneous carbon and nitrogen biodegradation, with an anoxic-aerobic bioparticle circulation pattern. In the Circulating Fluidized Bed Biofilm Reactor (CFBBR), bioparticles are slowly transferred from the Riser (Anoxic column) to the Downer (Aerobic column) for enhanced biological nutrient removal (BNR), with bioparticles residing in the Downer prior to recirculation back to the Riser for refreshment. In this study, low shear stress was maintained during all experiments in order to achieve rich biofilm conditions, where predation was encouraged. A lab-scale CFBBR with a 4L reaction zone was designed to evaluate the circulation effect. Long-term (285 days) performance showed that stable and high-rate chemical oxygen demand (COD) with sodium acetate as the carbon source and total nitrogen (NH 4Cl as nitrogen source) conversions were achieved simultaneously, with extremely low sludge production in the 0.034-0.1gVSS(volatile suspended solids)/gCOD range. These results supported the considerable advantages of the bioparticle process in biological nutrient removal.

Original languageEnglish
Pages (from-to)35-44
Number of pages10
JournalChemical Engineering Journal
Volume181-182
DOIs
Publication statusPublished - 1 Feb 2012
Externally publishedYes

Keywords

  • Biofilm
  • Bioparticle circulation
  • Circulating fluidized bed biofilm reactor (CFBBR)
  • Decay
  • Predation

ASJC Scopus subject areas

  • Chemistry (all)
  • Environmental Chemistry
  • Chemical Engineering (all)
  • Industrial and Manufacturing Engineering

Fingerprint

Dive into the research topics of 'Simultaneous carbon and nitrogen removal with enhanced bioparticle circulation in a Circulating Fluidized Bed Biofilm Reactor'. Together they form a unique fingerprint.

Cite this