|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|4996671||1459897||2018||7 صفحه PDF||سفارش دهید||دانلود کنید|
- The microalgae growth treating secondary effluent and digestate was assessed.
- A novel co-pretreatment was evaluated for enhancing microalgae anaerobic digestion.
- A steady biomass concentration (1Â gTSS/L) dominated by Scenedesmus sp was achieved.
- A high organic matter and a complete removal of N-NH4+ and P-PO43â, was observed.
- CH4 yield increased by 130% by microalgae and WAS co-pretreatment and codigestion.
In this study, microalgae digestate and secondary effluent were used to grow microalgae in a tertiary wastewater treatment, and then, the biomass was co-digested for biogas generation. A 30Â L closed-photobioreactor was used for microalgae cultivation. The biomass, mainly composed by Scenedesmus sp., reached and maintained a concentration of 1.1Â gTSS/L during 30Â days. A complete removal of N-NH4+ and P-PO43â and high nitrates and organic matter removals were achieved (58% N-NO3â and 70% COD) with 8Â d of HRT. The potential biogas production of the cultivated microalgae was determined in batch tests. To improve their biodegradability, a novel method combining their co-digestion with activated sludge after a simultaneous autohydrolysis co-pretreatment was evaluated. After the co-pretreatment, the methane yield increased by 130%. Thus, integrating microalgae tertiary treatment into activated sludge systems is a promising and feasible solution to recover energy and nutrients from waste, improving wastewater treatment plants sustainability.
Journal: Bioresource Technology - Volume 247, January 2018, Pages 513-519