000			04258nas a2200409 a 4500
005			20260818090648.0
008			260616s20269999th u ms t 000 eng d
035			_a.b12507994
099		9	_aAIT Thesis no.EV-26-07
100	1		_aShinwari, Maryam
245	1	0	_aDevelopment of a hybrid sewage sludge-rice husk biochar adsorbent for sustainable wastewater treatment in Thailand
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2026
300			_a120 leaves : _bill.+ _e1 online resource
490	1		_aThesis ; _vno. EV-26-07
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environmental Engineering and Management
502			_aThesis (M. Sc.) - Asian Institute of Technology, 2026
520			_aExcessive discharge of nitrogen (N) and phosphorus (P) from inadequately treated domestic wastewater drives eutrophication across freshwater and coastal ecosystems in developing countries. In Thailand, centralized facilities treat only ~22% of wastewater generated, with influent TN (35{u2013}60 mg L⁻¹) and TP (4{u2013}8 mg L⁻¹) routinely exceeding Pollution Control Department (PCD) discharge standards of TN < 20 mg L⁻¹ and TP < 4 mg L⁻¹. Municipal sewage sludge and rice husk two abundant waste streams are largely landfilled or openly burned, compounding environmental burdens. This study addresses both challenges by developing a co-pyrolyzed sewage sludge{u2013}rice husk biochar composite (SSRH) as a low cost adsorbent for simultaneous ammonium (NH₄⁺{u²⁰¹³}N) and phosphate (PO₄³⁻{u²⁰¹³}P) removal.Three biochar materials sewage sludge biochar (SSB), rice husk biochar (RHB), and a 1:1 co-pyrolyzed composite (SSRH) were synthesized at 500 °C under oxygen-limited conditions. Materials were characterized by BET, BJH, pore analysis, and SEM. Adsorption performance was evaluated through batch kinetic and isotherm experiments using PFO, PSO, Langmuir, and Freundlich models, followed by validation in real domestic wastewater against PCD standards.Despite its lowest BET surface area (91.73 m² g⁻¹), SSRH exhibited hierarchical pore architecture (DFT pore volume: 0.054 cm³ g⁻¹) and a dual-domain morphology integrating porous carbon with reactive mineral phases (Fe/Al/Ca{u2013}OH). At 180 min, SSRH achieved 70.20% NH₄⁺{u²⁰¹³}N and 58.00% PO₄³⁻{u²⁰¹³}P removal, outperforming SSB and RHB at p < 0.001. PSO kinetics (R² = 0.995) and Langmuir isotherms (R² = 0.991) best described adsorption behavior, yielding q_max of 32.80 and 5.86 mg g⁻¹ for NH₄⁺{u²⁰¹³}N and PO₄³⁻{u²⁰¹³}P, respectively. In real wastewater (TN = 44.2 mg L⁻¹; TP = 5.5 mg L⁻¹), SSRH alone achieved simultaneous PCD compliance, reducing TN to 18.4 mg L⁻¹ and TP to 2.5 mg L⁻¹. Langmuir predictions matched experimental values within ±0.9 percentage points.Co-pyrolysis of sewage sludge and rice husk yields a multifunctional adsorbent meeting regulatory standards through synergistic porosity and mineral reactivity, offering a scalable circular-economy solution for decentralized wastewater treatment across South and Southeast Asia.
650		0	_aBiochar _zThailand
650		0	_aSewage sludge
650		0	_aSewage _xPurification _zThailand
700	0		_aThammarat Koottatep, _eChairperson
700	1		_aGhimire, Anish, _eExamination Committee
700	0		_aChongrak Polprasert, _eExamination Committee
710	2		_aPMU-KPCIP-AIT Scholarship, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-26-07
856	4	0	_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B24444
907			_a.b12507994 _bmnarc _ca
902			_a260622
998			_b0 _c260617 _dm _eh _fa _g0
945			_lmnarc
945			_lmnarc
942			_c67
942			_c40
909			_aBarcode : - _bCREATED : 2026-06-16 _cRECORD # : i13605240 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050120421036 _bCREATED : 2026-06-17 _cRECORD # : i13605884 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
999			_c28796 _d28796