Nutrient recovery from anaerobic digester liquid effluent using ornamental aquatic macrophytes

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Abstract

Anaerobic digestion (AD) which treat food waste is a waste-to-energy method that produces liquid effluent. This by-product, known as digestate, contains high nutrients that could be recovered using ornamental aquatic macrophytes in a constructed wetland system. This study investigates the capacity of nutrient recovery of Canna indica, Iris pseudacarus, and Typha latifolia from liquid digestate, together improving the quality of AD effluent. Constructed wetland with T. latifolia effectively removed TSS and COD to meet the wastewater quality standards (TSS = 71 mg/L, COD = 56.735 mg/L). C. indica removed up to 72% N as the highest N removal efficiency, and recovered most of N, even though it still needs longer detention time to meet the standard. I. pseudacarus removed up to 98% P yet the average TP level in the plant was slightly above T. latifolia. The result shows that nutrient recovery using constructed wetland improves the effluent quality within short operation period, meanwhile C. indica and I. pseudacarus as ornamental aquatic macrophytes also added the aesthetic value to the environment.

Original languageEnglish
Article number012070
JournalIOP Conference Series: Earth and Environmental Science
Volume105
Issue number1
DOIs
Publication statusPublished - 25 Jan 2018
Event2nd International Tropical Renewable Energy Conference, i-TREC 2017 - Bali, Indonesia
Duration: 3 Oct 20174 Oct 2017

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