A hybrid algal photosynthesis and ion-exchange (HAPIX) process for side stream wastewater treatment: Experimental and modeling studies

Meng Wang, Karl Payne, Shuang Tong, Sarina Ergas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

A hybrid ion-exchange and algal photosynthesis (HAPIX) process was used for treatment of side stream centrate from an anaerobic digester treating waste activated sludge. Although the high NH4+-N concentration of the centrate (~1180 mg/L) inhibited algal growth in unamended controls, addition of zeolite reduced the ammonia toxicity due to its ion exchange capacity. Na+ was the major cation exchanged with NH4+. Growth of algae further reduced the NH4+-N concentrations. Different zeolite dosages (60, 150, and 250 g/L) resulted in different concentrations of NH4+-N in solution. Algae grown in lower zeolite dosage (60 g/L) had high protein contents. A mathematical model that combined ion-exchange and algal photosynthesis processes predicted the aqueous NH4+-N concentration well. The HAPIX process is feasible for treatment of high NH4+-N strength side stream wastewaters while regulating intracellular algal biomass contents by adjusting zeolite dosages.

Original languageEnglish (US)
Title of host publicationWater Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017
PublisherWater Environment Federation
Pages142-152
Number of pages11
ISBN (Print)9781510863682
StatePublished - Jan 1 2017
EventWater Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017 - Chicago, United States
Duration: Sep 30 2017Oct 4 2017

Publication series

NameWater Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017
Volume1

Other

OtherWater Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017
CountryUnited States
CityChicago
Period9/30/1710/4/17

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All Science Journal Classification (ASJC) codes

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

Cite this

Wang, M., Payne, K., Tong, S., & Ergas, S. (2017). A hybrid algal photosynthesis and ion-exchange (HAPIX) process for side stream wastewater treatment: Experimental and modeling studies. In Water Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017 (pp. 142-152). (Water Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017; Vol. 1). Water Environment Federation.