Properties of Alternative Fertilizer from Adsorption of N and P Nutrients in Wastewater by Smectite and Lignite Fly Ash

  • Niphon Jaisut หลักสูตรวิทยาศาสตรมหาบัณฑิต สาขาวิทยาศาสตร์สิ่งแวดล้อม คณะสิ่งแวดล้อม มหาวิทยาลัยเกษตรศาสตร์
  • Kanita Tungkananuruk รองศาสตราจารย์ ภาควิชาวิทยาศาสตร์สิ่งแวดล้อม คณะสิ่งแวดล้อม มหาวิทยาลัยเกษตรศาสตร์
  • Watcharapong Wararam อาจารย์ ภาควิชาวิทยาศาสตร์สิ่งแวดล้อม คณะสิ่งแวดล้อม มหาวิทยาลัยเกษตรศาสตร์
  • Daojarus Ketrot อาจารย์ ภาควิชาปฐพีวิทยา คณะเกษตร มหาวิทยาลัยเกษตรศาสตร์
Keywords: Smectite, Lignite fly ash, Alternative fertilizer


This research was aimed to prepare alternative fertilizer by nutrients adsorption process of smectite (SMT) and lignite fly ash (LFA) adsorbent in municipal and swine farm wastewater. SMT and LFA were a good adsorbent for ammonium and phosphate in aqueous solution respectively. Adsorption capacity of SMT and LFA at 5.12 mg.g-1 and 199.87 mg.g-1 were achieved respectively. Two types of fertilizer were produced, i.e. saturated ammonium SMT (FI) and saturated phosphate LFA (FII). The result of chemical properties of FI and FII reveals that total N were 1.28 and 0.12 % respectively, total P2O5 were 5.29 and 0.43 % respectively and organic matter content were 0.35 and 0.86 % respectively. When comparing with organic fertilizer standard, FI and FII gave the total N and total P2O5 over the standard. The releasing rate of ammonium from FI was 32.26 mg.L-1.min-1 and phosphate from FII with adding 0.5 M NaHCO3 solution was 7.73 mg.L-1.min-1. Therefore, these two fertilizers were slow releasing Nitrogen-based and Phosphorus-based fertilizers and appropriate used as alternative fertilizer for agriculture.


1. Agricultural Economic Information [Internet]. 2017. Retrieved June, 2018, from

2. Water quality standards [Internet]. 2010. Retrieved June, 2018, from

3. APHA, AWWA and WEF. Standard Methods for the Examination of water and Wastewater. 21st.
Washington, D.C; USA. 2005.

4. Soil analysis process [Internet]. 2012. Retrieved June, 2018, from

5. Bray R, Kurtz LT. Determination of total organic and available forms of phosphorus in soils. Soil Sci. 1945; 59: 39-45.

6. Walkley A, Black IA. Chromic acid titration method for determination of soil organic matter. Soil Sci. 1947; 63: 251-257.

7. Sirinuch L. Zeolite and Zeolite Technology. KKU Sci J. 2013; 41(1): 56-66. Thai.

8. Woravut M, Sopha V, Joseph K. The improvement of compressive strength for adobe block by using lime and palm oil ash [MPh thesis]. Bangkok: Kasetsart University; 2011. Thai.

9. Mehrez H, César V, Natalia M, Oriol F, Xavier Q, Narjès HB, et al. Fly ash as reactive sorbent for phosphate removal from treated waste water as a potential slow release fertilizer. J Environ Chem Eng. 2017; 5: 160–169.

10. Diana G, Hermassi M, Valderrama C, Farran A, Cortina JL. Recovery of ammonium and phosphate from treated urban wastewater by using potassium clinoptilolite impregnated hydrated metal oxides as N-P-K fertilizer. J Environ Chem Eng. 2016; 4(3): 3519–3526.

11. Lu SG, Bai SQ, Zhu L, Shan HD. Removal mechanism of phosphate from aqueous solution by fly ash. J Hazard Mater. 2009; 161: 95–101.

12. Jinying Y, Donald W, Kirk C, XinanLiu QJ. Sorption of aqueous phosphorus onto bituminous and lignitous coal ashes.
J Hazard Mater. 2007; 148(1-2): 491–497.

13. Olsen L, Cole SR, Watanabe CV, Dean FS. Estimation of available phosphorus in soils by extraction with sodium bicarbonate. U.S.D.A. Circular. 1954; 939: 1-21.

14. Standard Organic Fertilizer [Internet]. 2005. Retrieved June, 2018, from