Fermentation liquid of food waste as carbon source for denitrification

Zhe Cheng, Xiaochang Wang, Yongmei Zhang, Gyokuyu Ri, Hao Hao

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Fermentation liquid of food waste consisted of large amount of readily (VFA, lactate) and slowly (carbohydrate, protein) biodegradable organic substances. In this study, the feasibility of using fermentation liquid of food waste as external carbon to improve nitrogen removal was investigated. Firstly, SBR was used to treat low C/N ratio wastewater with the addition of fermentation liquid as external carbon. After 40 days' acclimatization, nitrogen removal rate reached 85% and COD concentration in the effluent was below 40 mg/L, which demonstrated that adding fermentation liquid of food waste obviously enhanced nitrogen removal efficiency. Then, the characteristics of denitrification were studied by batch experiments. It was found that nitrite accumulation occurred when C/N ratio was lower than 5.1, while it disappeared as C/N ratio increased to 6.5. At this optimum C/N ratio of 6.5, denitrification rate was 3.77 mg NO3--N/(g VSS·h).

本文言語English
ページ(範囲)719-724
ページ数6
ジャーナルChinese Journal of Environmental Engineering
9
2
出版ステータスPublished - 2015 2 5

ASJC Scopus subject areas

  • 環境工学
  • 環境化学
  • 水の科学と技術
  • 廃棄物管理と処理
  • 汚染

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