Balancing carbon/nitrogen ratio to improve nutrients removal and algal biomass production in piggery and brewery wastewaters

Hongli Zheng, Mingzhi Liu, Qian Lu, Xiaodan Wu, Yiwei Ma, Yanling Cheng, Min M Addy, Yuhuan Liu, R. R Ruan

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

To improve nutrients removal from wastewaters and enhance algal biomass production, piggery wastewater was mixed with brewery wastewaters. The results showed that it was a promising way to cultivate microalga in piggery and brewery wastewaters by balancing the carbon/nitrogen ratio. The optimal treatment condition for the mixed piggery-brewery wastewater using microalga was piggery wastewater mixed with brewery packaging wastewater by 1:5 at pH 7.0, resulting in carbon/nitrogen ratio of 7.9, with the biomass concentration of 2.85 g L−1, and the removal of 100% ammonia, 96% of total nitrogen, 90% of total phosphorus, and 93% of chemical oxygen demand. The application of the established strategies can enhance nutrient removal efficiency of the wastewaters while reducing microalgal biomass production costs.

Original languageEnglish (US)
Pages (from-to)479-486
Number of pages8
JournalBioresource Technology
Volume249
DOIs
StatePublished - Feb 2018

Keywords

  • Brewery wastewater
  • Carbon/nitrogen ratio
  • Microalga
  • Piggery wastewater

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