Hybrid algal photosynthesis and ion exchange (HAPIX) process for high ammonium strength wastewater treatment

Meng Wang, Karl A. Payne, Shuang Tong, Sarina J. Ergas

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A hybrid algal photosynthesis and ion exchange (HAPIX) process was developed that uses natural zeolite (chabazite) and wild type algae to treat high ammonium (NH4 +) strength wastewater. In the HAPIX process, NH4 + is temporarily adsorbed from the liquid, which reduces the free ammonia (FA) concentration below the inhibitory level for algal growth. The slow release of adsorbed NH4 + subsequently supports the continuous growth of algae. In this study, a HAPIX reactor reduced NH4 +-N concentrations in centrate from an anaerobic digester from 1180 mg L−1 to below 10 mg L−1 without dilution. Chabazite doses of 60 g L−1 produced more algal biomass, with higher protein and starch contents, than doses of 150 g L−1 and 250 g L−1. Approximately 67–70% of fatty acids in the algal biomass harvested from HAPIX reactors were unsaturated. A mathematical framework that couples a homogeneous surface diffusion model with a co-limitation algal kinetic growth model reasonably predicted the algal biomass production and NH4 +-N concentrations in the HAPIX reactors. The HAPIX process has the potential to serve a two-fold purpose of high NH4 +-N strength wastewater treatment and agricultural or commercial biopolymer production.

Original languageEnglish (US)
Pages (from-to)65-74
Number of pages10
JournalWater Research
Volume142
DOIs
StatePublished - Oct 1 2018

Fingerprint

Photosynthesis
Wastewater treatment
ion exchange
Ion exchange
photosynthesis
ammonium
chabazite
Biomass
Algae
biomass
alga
Surface diffusion
Growth kinetics
Biopolymers
Starch
Fatty acids
zeolite
starch
Dilution
wastewater treatment

All Science Journal Classification (ASJC) codes

  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Cite this

Wang, Meng ; Payne, Karl A. ; Tong, Shuang ; Ergas, Sarina J. / Hybrid algal photosynthesis and ion exchange (HAPIX) process for high ammonium strength wastewater treatment. In: Water Research. 2018 ; Vol. 142. pp. 65-74.
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Hybrid algal photosynthesis and ion exchange (HAPIX) process for high ammonium strength wastewater treatment. / Wang, Meng; Payne, Karl A.; Tong, Shuang; Ergas, Sarina J.

In: Water Research, Vol. 142, 01.10.2018, p. 65-74.

Research output: Contribution to journalArticle

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