Combination of Coagulation, Adsorption, and Ultrafiltration Processes for Organic Matter Removal from Peat Water

Abstract

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.

Banana Peels Pectin Templated Silica Ultrafiltration Membrane in Disk Plate Configuration Applied for Wetland Water Treatment

“…This result exhibits higher pressure obtains higher water flux [26,49]. Similar result is obtained from other research by Elma et al, [50] that higher filtration pressure affects membrane operation driving force so the water flux enhanced. Also, the graph define wet saline water flux are higher than peat water.…”

“…Membrane technology has long been a separation process in the industrial world because of its fast and efficient process [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. In general, there are three types of membrane process that are usually applied, it is called reverse osmosis (RO), membrane distillation (MD), pervaporation and ultrafiltration [28].…”

Enhanced Photocatalytic Activity of Zn-Al Layered Double Hydroxides for Methyl Violet and Peat Water Photooxidation

“…The photocatalytic activity of the sample to reduce organic components in peat water was evaluated based on natural organic matter (NOM) analysis by means of specific ultraviolet absorbance (SUVA) at 254 nm on NOM and the chemical oxygen demand (COD) reduction [ 3 , 13 ]. The COD was measured by chromate oxidation followed by spectrophotometric analysis.…”

“…By the lack of oxygen, the leached components intrusions form the peat water with the characteristic of containing a heterogeneous mixture of organic compounds with various chemical functional groups, structures, and molecular weights. The peat water characteristics such as high chemical oxygen demand (COD), natural organic matter (NOM), a black color, and high total suspended solids (TSS) are unacceptable to be directly consumed, but its availability follows the soil and area conditions [ 2 , 3 ]. The exploration for photocatalytic treatment with efficiencies and reusability of the process is a great challenge to provide a low-cost photocatalytic treatment.…”

Iron Adsorption in Peat Water by Sago Waste Activated Carbon

“…Several researches such as coagulation, flocculation, adsorption, filtration, membrane (Apriani et al, 2016), two stages adsorption-ultrafiltration (Mahmud et al, 2020), oxidation-filtration (Arifianingsih et al, 2020) coagulation-adsorption-ultrafiltration (Elma et al, 2022) have been attempted for peat water treatment. Among them, the most commonly applied is adsorption.…”