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Journal : Jurnal Dampak

Application of Batch Electrocoagulation for Pollutant Removal in Tapioca Wastewater: An Environmental Engineering Approach for Sustainable Water Treatment Solutions Fajar, Mutiara; Putra, Afrinaldi; Munandar, Andika; Lutfi Setia Putri, Shabrina; Utami, Resarizki
Dampak Vol. 21 No. 1 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.21.1.15-22.2024

Abstract

Tapioca wastewater is rich in organic compounds, leading to high levels of COD (Chemical Oxygen Demand) and TSS (Total Suspended Solids). When these concentrations exceed regulatory standards, they can cause significant water pollution, which may indirectly affect human health. Therefore, it is essential to treat tapioca wastewater before discharging it into water bodies. Electrocoagulation is a promising treatment method for this purpose, as it can effectively remove contaminants through coagulation, separation, and sedimentation of fine particles using electrical energy. This study evaluated the efficiency of COD and TSS removal from tapioca wastewater using an aluminium electrode with voltage variations of 10, 20, and 30 volts. Initial concentrations of COD and TSS in the untreated wastewater were measured at 641 mg/L and 382 mg/L, respectively. Optimal removal rates were achieved at 20 volts, with reduction efficiencies of 79.5% for COD and 82.7% for TSS. Statistical analysis using ANOVA indicated a significant impact of voltage variations on COD and TSS removal efficiency, with a p-value < 0.05 and an F-value greater than the critical F-value. These findings demonstrate that electrocoagulation, particularly at an optimal voltage of 20 volts, effectively reduces the COD and TSS levels in tapioca wastewater, suggesting its potential application as an environmentally friendly solution for industrial wastewater treatment.
Efektivitas Kombinasi Zeolit dan Batu Apung dalam Menurunkan Konsentrasi Besi (Fe) pada Air Tanah: Studi Kasus di Pidada, Kecamatan Panjang, Bandar Lampung Dalimunthe, Sahriwani; Fajar, Mutiara; Noor Azizah, Rifka
Dampak Vol. 21 No. 2 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.21.2.27-33.2024

Abstract

Water is a very important component for all life on earth. Iron is a heavy metal, and levels can be dangerous if they exceed threshold levels. Preliminary tests show that Fe in well water is 1.66 mg/l. This study aims to analyze the effectiveness of removal of iron (Fe) contained in well water using a combination of zeolite – pumice adsorbent media. One method that can be used to set aside iron (Fe) parameters in well water is the adsorption method. The adsorption process was carried out continuously with downflow for 150 minutes with sampling every 30 minutes for analysis with a Hach DR 1900 series spectrophotometer. Based on the results of the FTIR characterization analysis of zeolite adsorbents it was indicated that the functional groups were O–H hydroxy stretching vibrations, O-H bending vibrations, stretching vibrations. asymmetric Si-O-Si or Al-O-Al and symmetrical stretching vibration Si-O-Si or Al-O-Al. While the pumice adsorbent before and after being activated, there was a shift in wave numbers with the same functional groups, namely the O-H, C=O, Si-O and Al/Si-O bond groups. Of the five treatments, it is known that treatment V (ZEO30-AP70) is the most effective treatment in reducing Fe levels in well water with a removal efficiency of 98% in the 90th minute and the suitable isotherm model is the Langmuir isotherm with a maximum adsorption capacity of 0, 000739809 mg/g. Keywords: Well water, adsorption, zeolite, pumice
Phytoremediation in Constructed Wetlands Using Genjer to Reduce COD, TDS, and Phosphate Kurnianingtyas, Erlina; Nio Lya Panggabean, Pasu; Fajar, Mutiara; Faizaturrohmah, Nur
Dampak Vol. 23 No. 1 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.23.1.138-150.2026

Abstract

The increase in laundry service activities in Indonesia has an impact on the high water pollution due to the disposal of laundry waste containing chemicals such as COD, TDS, and Phosphate. Laundry waste, which is discharged directly into the environment without treatment, can lead to eutrophication, deterioration of water quality, and the death of aquatic biota. Phytoremediation with a constructed wetland system using genjer plants (Limnocharis flava) was chosen as an environmentally friendly, and low-cost treatment alternative. This study aims to analyze the effectiveness of reducing COD, TDS, and Phosphate levels of laundry waste with genjer plants in the constructed wetland system, as well as to analyze the relationship between the 0, 4th, 8th and 12th day stay time on the reduction of parameters before and after treatment. Preliminary experiments used a control reactor (without plants) and a treatment reactor (10 plants). The results of this study showed the ability to set aside the largest removal in the treatment reactor at COD levels of 88,147%, TDS of 12,776% and phosphate of 14,911% on day 12.. This shows that the constructed wetland method is relatively effective to be applied as laundry waste treatment.