Nitrogen and phosphorous adsorption from post-hydrothermal liquefaction wastewater using three types of zeolites

• DOI: 10.25165/ijabe.v8i5.1561
• Publication Date: 2015-10-31
• Authors: Ran Xia; Na Duan; Yuanhui Zhang; Baoming Li; Zhidan Liu; Haifeng Lu
• Keywords: Clinoptilolite; Hydrothermal liquefaction

Hydrothermal liquefaction (HTL) has been studied as a promising technology for converting wet biomass into bio-crude oil and the nutrient-rich post-hydrothermal wastewater (PHWW) could be reused algae bacteria production. However, PHWW from HTL contains various types of contaminants that need to removed before reuse. Too high nutrients (nitrogen phosphorous) contents, such ammonium, are inhibitive algal growth species in anaerobic process. It is desirable reduce concentration an acceptable level using zeolite adsorption. This study investigated nitrogen phosphorous adsorption efficiencies three zeolites: activated clinoptilolite, natural clinoptilolite Na-modified zeolite. Effects ions pH process were also investigated. Results showed variables affecting ammonium ranked follows: dosage > type particle size, via orthogonal experiment design. Activated with size 0.18-0.30 mm 0.4 g/mL demonstrated highest efficiency 54.92%. Zeolite adsorb organic had (97.85%). effective PHWW. The treated can then used culturing or treatment, adsorbed later. Keywords: adsorption, nutrients; phosphorous, zeolite, (PHWW) DOI: 10.3965/j.ijabe.20150805.1561

Citation: Ran X, Duan N, Zhang Y H, Li B M, Liu Z D, Lu H F. Nitrogen zeolites. Int J Agric & Biol Eng, 2015; 8(5): 86－95.