A techno-economic assessment of nutrient recovery from wastewater using microalgae: scenario in India collected from published literature

• 出版年: Water Science and Technology
• 主要な著者: Jesna Fathima, Pritha Chatterjee
• フォーマット: 論文
• 言語: 英語
• 出版事項: IWA Publishing 2022-09-01
• 主題: break-even selling price; dynamic microalgae modelling; indian conditions; nutrient removal; techno-economic analysis; wastewater treatment
• オンライン･アクセス: http://wst.iwaponline.com/content/86/6/1325
• ISSN: 0273-1223; 1996-9732

The true potential of the microalgae-based wastewater treatment (MWT) process is determined based on whether the process will provide a positive energy output and whether it is economically viable. The objectives of this study are dynamic modelling of microalgae growth based on initial wastewater concentration, temperature, solar radiation and a techno-economic assessment for an MWT scheme for application in a hot, dry climate. Through reference to relevant literature data on MWT in the Indian subcontinent, a selection of appropriate microalgal species Chlorella and Scenedesmus was made. The dynamic model developed was successfully calibrated and validated using independent experimental data collected from the published literature. Cost of production of bio-crude from microalgae grown in a hybrid photobioreactor and pond system in kitchen wastewater of Indian Institute of Technology, Hyderabad was calculated. A break-even selling price (BESP) of US$0.549/kg was obtained for the microalgae biomass. The cost of production of 1 L bio-crude was US$0.96 (Rs 69–74), which is comparable with crude oil cost. The model developed can be used by practising engineers to predict biomass growth and nutrient removal, thereby achieving a break-even point for cost efficiency. HIGHLIGHTS Dynamic modelling of microalgae growth and nutrient removal in a warm arid climate.; Chlorella and Scenedesmus were the most suitable microalgae species for nutrient recovery.; Microalgae grown in a hybrid photobioreactor and pond system in kitchen wastewater.; Break-even selling price of US$0.549/kg for algal biomass to cover operating costs.; Cost for 1 L bio-crude production US$0.96 (Rs 69–74) under optimum conditions.;