Wyniki wyszukiwania - Biblioteka Nauki

1

Distribution of Microplastics in Domestic Wastewater and Microplastics Removal Potential in Wastewater Treatment Plants

100%

Fauzi M. , Darnas Y. , Muna C. R. , Nizar M.

Journal of Ecological Engineering

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2023

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tom Vol. 24, nr 12

79--86

EN

Microplastics in domestic wastewater are detrimental to living organisms and appear in a variety of sizes, colors, and shapes. The purpose of this study is to examine the distribution of microplastics in domestic wastewater, as well as the possibility for microplastic removal in wastewater treatment plants (WWTP). The sampling method used is SNI 6989.59:2008 concerning Wastewater Sampling Methods that Apply in Indonesia. To remove organic compounds in the sample, 0.05 M Fe (II) and 30% H2O2 solution were added by the digestion process at 75 °C for 30 minutes and cooled. Samples were filtered using Whattman GF/C filter paper with the help of a vacuum pump and dried. To identify the concentration, shape, size, color of microplastics, visual analysis was used with the help of a microscope using the zig-zag technique. The concentration of microplastics in domestic wastewater in Gampong Garot is 30.17 ± 0.75 particles/100 mL sample. The most commonly found microplastic size is 1,001–5,000 μm, while the dominant color is transparent. The forms of microplastic found in the samples were fiber, fragments and microbeads with a percentage of 65.20%, 23.16% and 11.64%, respectively. These microplastics come from local community activities such as washing clothes, bathing, washing dishes, and other activities. So, it is necessary to treat domestic wastewater using WWTP. Not only does it remove organic matter and nutrients, WWTP also has the potential of microplastics removal around 7–99% depending on the processing unit.

2

Treatment of Domestic Wastewater on Fixed-Bed Reactor Using Plastic Supporting Media – A Review

100%

Fauzi M. , Soewondo P. , Nur A.

Ecological Engineering & Environmental Technology

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2023

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tom Vol. 24, iss. 6

276--281

EN

Biofilm processes are increasingly being recognized for the removal of organics and nutrients in domestic wastewater treatment. One system that is often used is the Fixed-Bed Reactor (FBR). This review aimed to analyze wastewater treatment using anoxic-aerobic FBR system with various supporting media. The method used was the descriptive analysis of articles obtained from Google Scholar, ScienceDirect, and Springer. The results of the review showed that wastewater treatment with a growth system is able to remove organics and nutrients quite high. The types of polymers used as supporting media for attaching biofilms consisted of PET, PS, HDPE, and LDPE. However, when viewed from the removal efficiency, the supporting media with polymers is superior to PET compared to other types. This is because PET has hydrophobic physicochemical properties which have good adhesion in the initial attachment of microorganisms. In addition, this type of PS polymer also has fairly high organic and nutrient removal efficiency, similarly to other types of polymers such as HDPE, and LDPE.

3

The effect of anthropogenic activities on the spatial distribution of total nitrogen and total phosphate in Lake Maninjau

100%

Komala P. S. , Zulkarnaini Z. , Kurniati R. I. , Fauzi M.

Journal of Water and Land Development

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2024

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tom no. 60

71--78

EN

This study aimed to analyse the effect of anthropogenic activities on the spatial distribution of total nitrogen (TN) and total phosphate (TP) in Lake Maninjau, Indonesia, during the dry season. Sampling was carried out at ten observation locations representative for various activities around the lake. Cluster analysis and ANOVA were used to classify pollutant sources and observe differences between TN and TP at each site. Concentrations of TN and TP are categorised as oligotrophic-eutrophic. The ANOVA showed spatially that some sampling locations, such as the Tanjung Sani River, floating net cages, and hydropower areas have different TN concentrations. At the same time, TP levels were consistently significantly different across sampling sites. ANOVA and cluster analysis confirmed that floating net cages were the first cluster and the primary contributor to TN and TP. The second and third clusters come from anthropogenic activities around the lake, such as agriculture, settlement, and livestock. The fourth cluster with the lowest TN and TP is the river that receives the anthropogenic activity load but has a high flow velocity. The cluster change analysis needs to be conducted when there are future changes in the composition of floating net cages, agriculture, and settlements.

4

Performances of Polyethylene Terephthalate Plastic Bottles Waste as Supporting Media in Domestic Wastewater Treatment Using Aerobic Fixed-Film System

75%

Fauzi M. , Soewondo P. , Nur A. , Handajani M. , Tedjakusuma T. , Oginawati K. , Setiyawan A. S.

Journal of Ecological Engineering

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2023

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tom Vol. 24, nr 10

30--39

EN

There has been a lot of research on domestic wastewater treatment utilizing polymer-based supporting media. The purpose of this study is to investigate the removal of organic compounds and nutrients, as well as the kinetics of substrate removal, in a batch aerobic fixed-film system that is fed by artificial domestic wastewater and uses Polyethylene Terephthalate (PET) plastic bottles waste as supporting media. The artificial domestics wastewater feeding contains C6H12O6, NH4Cl, and KH2PO4 as carbon, nitrogen, and phosphorus sources. Artificial domestics wastewater treatment was performed at COD levels of 200, 300, 400, 500, and 600 (mg/L). The findings demonstrated that an aerobic fixed-film system wastewater treatment with PET-supporting media could remove organics and nutrients. The removal for COD 85.76 ± 0.59%, ammonia 76.59 ± 0.83%, nitrite 76.09 ± 0.66%, nitrate 64.30 ± 0.42%, TN 77.02 ± 0.94%, and TP 86.54 ± 0.68%, with the Singh’s method substrate removal kinetics (k1) is 1.60 ± 0.05/hour. The benefit of supporting media from PET plastic bottle waste is contributing to plastic bottle waste reduction in Indonesia.

5

Microplastics abundance in domestic wastewater as a pollutant source for the Daroy River, Indonesia

63%

Fauzi M. , Soewondo P. , Darnas Y. , Handajani M. , Tedjakusuma T. , Nizar M. , Muna C. R. , Nur A.

Journal of Water and Land Development

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2023

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tom no. 59

118--125

EN

Domestic wastewater in Gampong Garot, Aceh Besar Regency, Aceh Province, Indonesia is directly discharged to the Daroy River without any treatment process. Domestic wastewater from Gampong Garot has been one of the contributors to microplastics contamination in the Daroy River. The microplastics (MPs) contained in domestic wastewater might come from used soaps and detergent products, as well as the scouring of clothes during washing. Thus, this study aims to investigate the abundance of MPs in domestic wastewater in Gampong Garot. The sampling points were determined based on purposive sampling, with samples taken at the end of the main pipe that directly leads to the Daroy River. Organics in domestic wastewater were removed using 30% H2O2 liquid through a digestion process at a temperature of 75°C. MPs characteristics such as size, shape, and colour were visually analysed using a light binocular microscope at 100× magnification, while the polymer type was analysed using Fourier transform infrared (FTIR) analysis. The concentration of MPs in domestic wastewater in Gampong Garot was 30.238 ±1.228 particles∙(100 cm)-3 sample. The most common sizes of MPs were found to be in the range of 1,001-5,000 μm, while the dominant colour and shape were transparent and fibre-like. Polyester (PES) was the most detected type of MPs. These findings highlight the need for wastewater treatment before discharge into aquatic bodies.