Kriteria Lokasi Instalasi Pengolahan Lumpur Tinja dan Optimasi Cakupan Layanan Menggunakan Sistem Informasi Geografis (Studi Kasus Kota Bandung)

The location of Faecal Sludge Treatment Plant (FSTP) that is not planned properly can result in a low level of FSTP service, a lack of supply of faecal sludge to the FSTP, and environmental pollution problems due to illegal dumping. In this study, an analysis of important aspects in determining the location of the FSTP and the application of the Geographical Information Systems (GIS) was carried out in optimizing the coverage of FSTP services in Bandung City. The identification of criteria and weight of criteria in determining the FSTP location was performed using a pairwise comparison method against the criteria and sub-criteria obtained from literature review and stakeholders input. The results of the identification criteria were then mapped and analyzed using ArcMAP 10.8.1. Based on the identification results, there are 5 criteria that are declared important in selecting FSTP locations, namely technical, institutional, regulatory and policy, financial, and public acceptance. Further identification of the 5 criteria found 22 sub-criteria and there are 10 sub-criteria including those that can be used in selecting and optimize the service coverage of the FSTP locations in this study. Based on the GIS mapping, an optimum service coverage to serve all areas in Bandung City that has not been served by a wastewater piping system was obtained by using 3 FSTP locations, namely Districts of Gedebage, Cinambo, and Andir with the total required area of 26,400 m2 in 2041. The optimum service coverage is obtained based on the sub-criteria of the shortest distance and the fastest travel time from the FTST location to the farthest service areas.Lokasi Instalasi Pengolahan Lumpur Tinja (IPLT) yang tidak direncanakan dengan tepat dapat mengakibatkan tingkat pelayanan IPLT menjadi rendah, kurangnya pasokan lumpur tinja ke IPLT, dan masalah pencemaran lingkungan akibat illegal dumping. Pada studi ini, dilakukan analisis terhadap aspek-aspek penting dalam penentuan lokasi IPLT serta penerapan Sistem Informasi Geografis (SIG) dalam mengoptimalkan cakupan layanan IPLT di Kota Bandung. Identifikasi kriteria dan bobot kriteria dalam penentuan lokasi IPLT dilakukan dengan menggunakan metode pairwase comparison terhadap kriteria dan subkriteria yang diperoleh dari kajian literatur dan masukan pemangku kepentingan. Hasil identifikasi kriteria kemudian dipetakan dan dianalisis dengan aplikasi ArcMAP 10.8.1. Berdasarkan hasil identifikasi, terdapat 5 kriteria yang dinyatakan penting dalam pemilihan lokasi IPLT yaitu teknis, kelembagaan, regulasi dan kebijakan, keuangan, serta penerimaan masyarakat. Identifikasi lebih lanjut dari 5 kriteria ditemukan 22 subkriteria dan terdapat 10 subkriteria diantaranya yang dapat digunakan dalam pemilihan lokasi dan optimasi cakupan layanan IPLT pada studi ini. Berdasarkan pemetaan SIG, diperoleh cakupan layanan optimum untuk melayani seluruh wilayah di Kota Bandung yang belum terlayani sistem perpipaan air limbah dengan penggunaan 3 lokasi IPLT yaitu Kecamatan Gedebage, Cinambo, dan Andir dengan total kebutuhan luas IPLT 26.400 m2 pada tahun 2041. Cakupan layanan optimum diperoleh berdasarkan subkriteria jarak terdekat dan waktu tempuh tercepat dari lokasi IPLT ke wilayah pelayanan terjau

ORGANIC REMOVAL IN DOMESTIC WASTEWATER USING ANAEROBIC TREATMENT SYSTEM-MBBR WITH FLOW RECIRCULATION RATIO AND INTERMITTENT AERATION

Aim: The modified Small-scale Domestic Sewage Treatment Plant (SDSTP) reactor with anaerobic fixed bed- aerobic Moving Bed Biofilm Reactor (MBBR) is implemented to find the optimum condition for organic degradation related to recirculation and intermittent aeration practices with the purpose to comply with the governmental regulation standard.  Methodology and Results: This research have been done with the artificial wastewater with characteristic similar to the sewage treatment plant (STP) of Telkom company with ratio C:N:P of characterized domestic wastewater is 252.40:85.42:3.01 that consists of glucose, NH4Cl, potassium dihydrogen phosphate, potassium nitrate, and sodium nitrite (NaNO2). Reactor design related with attached biomass in media until 2478.56 mg MLVSS.L-1 with the growth kinetics rate (μ) of 0.4691 day—1. The artificial wastewater is applied the determine the optimum variation of flow recirculation and periodic aeration in specific Hydraulics Retention Time (HRT) and Organic Loading Rate (OLR). In this research, the optimum recirculation ratio for organic degradation is 26.40 L.h-1 and the optimum aeration frequency variation is  12 hours in intermittent frequency with the maximum efficiency of organic degradation of 76.10% with the degradation efficiency real domestic wastewater application from STP Telkom company is 83.09%. Conclusion, significance and impact study:  Stover-Kincannon model is the best model with highest accuracy rate to model the degradation performance of organic compounds by the anaerobic fixed bed- aerobic MBBR SDSTP with determination coefficient 0.8623 and also degradation coefficient 38.121 day-1 compared with other models studied in this research

Edminister, Lemuel P.

https://digitalmaine.com/cw_med_exam_name/1182/thumbnail.jp

Performance of Moving Bed Biofilm Reactor Integrated Septic Tank in Treating Office Building Wastewater

This research aimed to find the effect of initial concentration and hydraulic retention time (HRT) on modified septic tank (MST) performance in treating wastewater from an office building. The synthetic wastewater used had an average COD:TN:TP ratio of 84:28:1, adjusted to office building wastewater characteristics. The experiment was executed under steady conditions using three variations of HRT (12, 24, and 36 hours) and different initial concentrations of COD (106, 252 and 432 mg COD/L), TN (35, 85 and 146 mg N/L) and TP (1.26, 3 and 5.14 mg P/L). The result showed that the MST removed 82% to 92% of COD, 41% to 60% of TN, 45% to 61% of NH4, and 39% to 55% of TP. The maximum removal was achieved at 36 h of HRT, COD:TN (3:1), and COD:TP (84:1). One-way ANOVA showed that the initial concentration and HRT had significant effects on the performance of MST (p < 0.05). This suggests that appropriate control of the initial concentration and HRT in the MST can effectively remove organics and nutrients from office building wastewater

小規模汚水処理施設（浄化槽）放流先水環境中における腸管系ウイルス指標の存在と消長

博士(工学)岐阜大学(Gifu University

Effect of recirculation ratio on the performance of modified septic tank in treating office building wastewater

Higher concentration of nutrients has been characterized from office buildings compared to domestic wastewater. A Modified Septic Tank (MST), which consists of anoxic conditions followed by a Moving Bed Biofilm Reactor (MBBR) is proposed to treat office wastewater. This research investigated the effect of Recirculation Ratio (RR) on organic and nutrient removal in MST. The synthetic wastewater with COD: TN: TP (252:85:3), which is similar to actual office wastewater was used. The experimental data were obtained from three RR values (2, 3 and 4). The results showed COD, TN, NH4, and TP removal ranged from 88% to 90%, 64% to 78%, 68% to 86%, and 56% to 64%, respectively. The effluent concentrations of COD and NH4 ranged from 21 to 30 and 9 to 23 mg/L after applying RR and from 19 to 24 and 27 to 29 mg/L without RR, respectively. RR had the significant effect on organic and nutritional removal (p <0.05). It suggested increasing RR could improve nutrient removal in MST and the stability of NH4 in the effluent needs to be considered

Kinetics of nutrient removal in an on-site domestic wastewater treatment facility

Domestic wastewater from office building has not been maintained well especially in the areas where the sewerage system is unavailable. The aims of this research were to investigate the performance and kinetics of nutrient removal in an on-site domestic wastewater treatment facility which consists of anaerobic and aerobic systems for treating wastewater from office building. The experimental data obtained from the variations of COD:N:P ratio 250:28:2.5, 350:38:2.9, 450:47:3.3, and 600:60:3.7 with three different HRT 48h, 24h, and 12h. A One-way ANOVA was performed to investigate the effects of HRT and initial concentration of TN and TP on the performance of nutrient removal. In order to obtain the kinetic coefficients, First Order, Second Order and Stover-Kincannon Models were employed. The results showed that maximum TN and TP removal efficiency were 56% and 86%, respectively. The results of one-way ANOVA showed that HRT and initial concentration of TN and TP gave the significant effects on nutrient removal (p < 0.05). Second Order and Stover-Kincannon Models were found to be more appropriate models for prediction of TN removal in this facility. Controlling HRT and C: N: P ratio may keep good performance of nutrient removal in this facility

Kinetics of nutrient removal in an on-site domestic wastewater treatment facility

Domestic wastewater from office building has not been maintained well especially in the areas where the sewerage system is unavailable. The aims of this research were to investigate the performance and kinetics of nutrient removal in an on-site domestic wastewater treatment facility which consists of anaerobic and aerobic systems for treating wastewater from office building. The experimental data obtained from the variations of COD:N:P ratio 250:28:2.5, 350:38:2.9, 450:47:3.3, and 600:60:3.7 with three different HRT 48h, 24h, and 12h. A One-way ANOVA was performed to investigate the effects of HRT and initial concentration of TN and TP on the performance of nutrient removal. In order to obtain the kinetic coefficients, First Order, Second Order and Stover-Kincannon Models were employed. The results showed that maximum TN and TP removal efficiency were 56% and 86%, respectively. The results of one-way ANOVA showed that HRT and initial concentration of TN and TP gave the significant effects on nutrient removal (p < 0.05). Second Order and Stover-Kincannon Models were found to be more appropriate models for prediction of TN removal in this facility. Controlling HRT and C: N: P ratio may keep good performance of nutrient removal in this facility