The high content of natural organic matter (NOM) is one of the challenging characteristics of peat water. It is also highly contaminated and contributes to some water-borne diseases. Before being used for potable purposes, peat water must undergo a series of treatments, particularly for NOM removal. This study investigated the effect of coagulation using aluminum sulfate coagulant and adsorption using powdered activated carbon (PAC) as a pretreatment of ultrafiltration (UF) for removal of NOM from actual peat water. After preparation and characterization of polysulfone (Psf)-based membrane, the system’s performance was evaluated using actual peat water, particularly on NOM removal and the UF performances. The coagulation and adsorption tests were done under variable dosings. Results show that pretreatment through coagulation–adsorption successfully removed most of the NOM. As such, the UF fouling propensity of the pretreated peat water was substantially lowered. The optimum aluminum sulfate dosing of 175 mg/L as the first pretreatment stage removed up to 75–78% NOM. Further treatment using the PAC-based adsorption process further increased 92–96% NOM removals at an optimum PAC dosing of 120 mg/L. The final UF-PSf treatment reached NOM removals of 95% with high filtration fluxes of up to 92.4 L/(m2.h). The combination of three treatment stages showed enhanced UF performance thanks to partial pre-removal of NOM that otherwise might cause severe membrane fouling.
Natural Organic Matter (NOM) content in peat water is a major problem of membrane fouling in ultrafiltration (UF). For that, two stages adsorption as pre-treatment was employed to minimize the membrane fouling of NOM content. This research was carried out to investigate the effect of two stages adsorption on ultrafiltration performance for NOM removal that remains in peat water. This method was using powdered activated carbon (PAC) dosage of 80, 160, 240, 320, 400, 480, 560, 640, 720, 800, 880 dan 960 mg.L-1. Then, Polysulfone (Psf) material was employed for Ultra filtration process. Membrane was applied in a dead-end mode with various operating pressure (1; 1.5; 2; 2.5; 3 bar). As a results, the optimum dose of PAC was 800 mg L-1 with dosage ratio of 3/4:1/4. Two stages adsorption-UF PSf provided the range from 86.9 to 92.8% of KMnO4 and 74.1-88.1% of UV254. For the experimental condition of 3 bar, the highest flux was achieved up to 39.919 L h-1.m-2.
<p>The primary problem encountered in the application of membrane technology was membrane fouling. During this time, hybrid process by coagulation-ultrafiltration in drinking water treatment that has been conducted by some research, using by one-stage coagulation. The goal of this research was to investigate the effect of two-stage coagulation as a pretreatment towards performance of the coagulation-ultrafiltration hybrid process for removal NOM in the peat water. Coagulation process, either with the one-stage or two-stage coagulation was very good in removing charge hydrophilic fraction, i.e. more than 98%. NOM fractions of the peat water, from the most easily removed by the two-stage coagulation and one-stage coagulation process was charged hydrophilic>strongly hydrophobic>weakly hydrophobic>neutral hydrophilic. The two-stage coagulation process could removed UV<sub>254</sub> and colors with a little better than the one-stage coagulation at the optimum coagulant dose. Neutral hydrophilic fraction of peat water NOM was the most influential fraction of UF membrane fouling. The two-stage coagulation process better in removing the neutral hidrophilic fraction, while removing of the charged hydrophilic, strongly hydrophobic and weakly hydrophobic similar to the one-stage coagulation. Hybrid process by pretreatment with two-stage coagulation, beside can increased removal efficiency of UV<sub>254</sub> and color, also can reduced fouling rate of the ultrafiltration membraneIt must not exceed 250 words, contains a brief summary of the text, covering the whole manuscript without being too elaborate on every section. Avoid any abbreviation, unless it is a common knowledge or has been previously stated.</p>
ABSTRAK Kajian ini bertujuan untuk mengetahui keadaan serta kondisi bank sampah yang ada di Kota Banjarbaru, mengetahui faktor prioritas dalam pengelolaan dan permasalahan bank sampah yang ada di Kota Banjarbaru serta mengetahui kajian SWOT (Kekuatan, Kelemahan, Peluang dan Ancaman) bank sampah yang ada di Kota Banjarbaru. Hasil analisis menunjukkan bahwa tingkat pengetahuan masyarakat tentang pemilahan sampah cukup baik yaitu sebesar 65%. Bank sampah jika dikelola dengan baik maka dapat mengelola sampah anorganik sebesar 11.156,14 kg/bulan dan sampah organik sebesar 200,64 kg/hari. Faktor prioritas dalam pengelolaan bank sampah adalah faktor pengetahuan (0,418) dan 3 besar subfaktor prioritas pengelolaan bank sampah adalah faktor pemahaman pengelolaan sampah (0,216), sarana dan prasarana (0,163) dan fasilitator (0,139). Sedangkan kekuatan bank sampah yang utama adalah mampu mengurangi timbulan sampah di masyarakat (0,402), kelemahan bank sampah adalah sangat tergantung pada keaktifan pengurus dalam mengelola bank sampah, peluang utama dari bank sampah yaitu dapat mengurangi timbulan sampah yang masuk ke TPA (0,428) dan ancaman utama bank sampah yaitu kurangnya minat masyarakat untuk menjadi nasabah bank sampah (0,385).Kata kunci: Bank sampah, timbulan sampah, AHP, Expert Choice 11
Air sumur Banjarbaru yang dipakai masyarakat masih mengandung logam berat yang apabila melebihi baku mutu dapat berbahaya bagi kesehatan.Tingginya Fe dan Mn yang didapatkan dari hasil pengujian awal yaitu 59,875 mg/l dan 11,200 mg/l. Ada beberapa cara untuk menurunkan kadar logam berat dalam air antara lain yaitu dengan penyaringan ataupun dengan proses adsorbsi menggunakan karbon aktif. Kulit pisang dapat dijadikan sebagai bahan karbon aktif karena mengandung asam galacturonic yang menyebabkan kulit pisang kuat untuk mengikat ion logam.Penelitian ini bertujuan untuk mengetahui karakteristik karbon aktif limbah kulit pisang Kepok, pengaruh aktivasi dan tanpa aktivasi karbon aktif dalam mengolah air sumur dan pengaruh variasi dosis karbon aktif dalam mengolah air sumur. Berdasarkan hasil penelitian, karbon aktif limbah kulit pisang Kepok mempunyai karakteristik kadar abu, daya serap terhadap Iodium, luas permukaan dan pH dengan nilai yang tinggi didasarkan pada SNI, hanya kadar air yang masuk SNI. Aktivasi kimia mempengaruhi dalam karakterisasi karbon aktif.Pada karbon aktif dengan aktivasi luas permukaannya lebih besar dibandingkan karbon aktif tanpa aktivasi.Kandungan Fe dan Mn setelah perlakuan untuk karbon aktif dengan aktivasi lebih rendah dibandingkan karbon aktif tanpa aktivasi.Pemberian variasi dosis karbon aktif mempengaruhi kandungan Fe dan Mn pada air sumur Banjarbaru.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.