04208nas a2200469 a 4500 20260817171418.0 210704s2021 th u m rtt 000 a eng d .b12372031 AIT Thesis no.EV-21-18 Thanawat Udombua Biochar-based constructed wetland for treating solar septic tank effluent Pathum Thani, Thailand : Asian Institute of Technology, 2021 70 leaves : ill. Thesis ; no. EV-21-18 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environmental Engineering and Management Thesis (M. Sc.) - Asian Institute of Technology, 2021 Constructed wetlands (CWs) were considered to treat effluent water from the solar septic tank afterward. Lateritic soil is suitable to select as the main material of media. However, the efficiency of lateritic soil to adsorb N and P in SST effluent still is low. Biochar has been used for soil remediations traditionally which it has benefits for plant uptake of nutrient (N and P). The rubber wood sawdust has the highest carbon. For effective biochar, the biomass was activated by 2.3M MgCl2.6H2O before a pyrolysis. Therefore, biochar can be used for combining lateritic soil to apply in the soil-based constructed wetlandsto be a Biochar-Based Constructed Wetland (BBCW). The results of media efficiency showed that yield percentage of biochar NB-300, MgB-300, NB-500, MgB-500, NB-600, and MgB-600 are 58.5, 58.36, 25.4, 40.42, 23.96, and 33.9, respectively. Biochar pyrolysis at low temperature was weight more than high temperature, and the pyrolysis at 500 o C and 600 o C, the MgBs was weight more than the NBs. The NH3-N adsorption of MgB-500 were 5.32 mg/g, which was maximum compared with other conditions. The MgB-600 and MgB-500 were the highest adsorption of TP arrived at 0.78 mg/g and 0.75 mg/g, respectively. Therefore, the MgB-500 was employed to used or applied into a constructed wetland. In addition, MgB-500 can highly adsorb NH3-N and TP for 24h and 8h, respectively from a time function experiment. The results of investigation of the BBCW show that concentrations of COD, TSS of the BBCW can remove that more than 80% and 90%, respectively. The BBCW were nutrient (N and P) removal efficiencies highly more than SBUP which was only soil as media layer. The BBCW was removal efficiency of TN were 64.14%, 65.08%, and 75.90% for HRT 12h, 24h, and 36h, respectively, which were TN removal efficiency more than BBUP which was unplanted. For design criteria, an appreciate criteria to design the BBCW to remove pollutants in SST effluent was HLR 0.09 m3 /m2 .day. Biochar Environmental aspects Constructed wetlands Septic tanks Thammarat Koottatep, Chairperson Xue, Wenchao, Examination committee Tatchai Pussayanavin, Examination committee Royal Thai Government Fellowship, Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-21-18 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B13491 .b12372031 mnait m 240418 0 210704 m a m 0 mnait mnait mnarc mnarc 40 67 20 Barcode : 30050120885883 CREATED : 2021-07-14 RECORD # : i13349703 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : - CREATED : 2021-07-14 RECORD # : i13349715 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121021967 CREATED : 2023-12-01 RECORD # : i13424804 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121021959 CREATED : 2023-12-01 RECORD # : i13424816 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 12114 12114 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-21-18 30050120885883 2026-08-17 17:14:18 1 2026-08-17 40 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-21-18 2026-08-17 17:14:18 2026-08-17 67 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-21-18 30050121021967 2026-08-17 17:14:18 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-21-18 30050121021959 2026-08-17 17:14:18 2 2026-08-17 20