Elucidating the microbial communities and anaerobic mechanisms of a new biomass capable of capturing carbon and sulfur pollutants for sulfate-laden wastewater treatment

Di Wu, Hai Guang Wang, Abhishek Anand, Hamish Mackey, Ji Dai, Feng Jiang, Hui Lu, Guang Hao Chen

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The municipal wastewater of coastal cities contains not only chemical oxygen demand (COD), nitrogen (N), and phosphorus (P) pollutants but also a significant concentration of sulfate (about 30–100 mg S-SO4/L). This emerging sulfate-laden wastewater, possibly resulting from the disposal of industrial waste or the seawater intrusion in the municipal wastewater, poses noteworthy operational problems like odor emissions, localized pipe corrosion, and inhibition of conventional biological treatment. To resolve these problems, we have recently developed a new sulfur-cycle enhanced biological phosphorus removal (SC-EBPR) process capable of removing COD, N, and P and controlling sulfide production. This study investigates the possibility of cultivating SC-EBPR biomass under various influent COD and sulfate concentrations (with initial organic carbon (C) to sulfur (S) ratios of 1, 2, and 3 g C/g S), which dominanted by sulfate-reducing bacteria, sulfur-oxidizing bacteria and unknown bacteria. Moreover, anaerobic batch experiments were conducted for (i) elucidating the fundamental mechanisms of carbon uptake/poly-hydroxyalkanoates formation (1.8–3.8 mg C/(gVSS h)), sulfate reduction/sulfur storage (0.9–1.9 mg S/(gVSS h)), and poly-phosphate degradation/P release (0.6–3.0 mg P/(gVSS h)), and (ii) understanding a new anaerobic pathway of simultaneous intracellular uptake of carbon and sulfur (as verified by carbon balance with only 5–10% error). Finally, a possible way of implementing the new SC-EBPR biomass in high-sulfate wastewater treatment was discussed.

Original languageEnglish
Pages (from-to)18-27
Number of pages10
JournalBiochemical Engineering Journal
Volume136
DOIs
Publication statusPublished - 15 Aug 2018

Fingerprint

Waste Water
Sulfur
Wastewater treatment
Biomass
Sulfates
Carbon
Biological Oxygen Demand Analysis
Phosphorus
Chemical oxygen demand
Bacteria
Wastewater
Sulfur-Reducing Bacteria
Industrial Waste
Salt water intrusion
Corrosion
Seawater
Sulfides
Industrial wastes
Odors
Organic carbon

Keywords

  • Enhanced biological phosphorus removal
  • Sulfate-Laden wastewater
  • Sulfur cycle bacteria
  • Uptake of carbon and sulfur

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Environmental Engineering
  • Biomedical Engineering

Cite this

Elucidating the microbial communities and anaerobic mechanisms of a new biomass capable of capturing carbon and sulfur pollutants for sulfate-laden wastewater treatment. / Wu, Di; Wang, Hai Guang; Anand, Abhishek; Mackey, Hamish; Dai, Ji; Jiang, Feng; Lu, Hui; Chen, Guang Hao.

In: Biochemical Engineering Journal, Vol. 136, 15.08.2018, p. 18-27.

Research output: Contribution to journalArticle

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