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"This report generally discusses the design process of the cyclone filter device which has never been attempted before here in Queensland University of Technology. It is considered as a pioneer project. The approach taken in the design process was to make a filtering device which is suitable to be installed i n industrial area. The device was designed so that it can be used for laboratory purposes so that students can investigate and obtain a better understanding on separation and/or filtration mechanism in cyclone filter. The main interests in this project are the characteristics of the device and the expected performance of the device ilself. Detailed study on these characteristics and expected performance will provide useful guidelines in establishing the design requirements and the design specifications of the device."

"Emerging contaminants (ECs) merupakan polutan yang menjadi sedang menjadi perhatian. Parasetamol merupakan salah satu emerging contaminant yang dapat menyebabkan pencemaran di badan air serta memiliki toksisitas yang dapat mempengaruhi kesehatan dan lingkungan. Adsorpsi merupakan alternatif metode penyisihan ECs yang menjanjikan karena cukup efisien, hemat biaya, dan mudah untuk dioperasikan. Penelitian ini dilakukan untuk membandingkan efektivitas proses adsorpsi senyawa parasetamol dengan berbagai jenis adsorben, mengevaluasi pengaruh parameter operasional pH terhadap efektivitas proses adsorpsi, dan mengevaluasi potensi penggunaan kembali adsorben. Kuantifikasi parasetamol dilakukan dengan COD metode spektrofotometri dan metode separasi solid-liquid yang digunakan adalah metode separasi dengan syringe filter. Penyisihan parasetamol menggunakan berbagai adsorben, yaitu powdered activated carbon (PAC), zeolit alam, fly ash, lumpur alum nonaktivasi, lumpur terkalsinasi, dan lumpur teraktivasi asam. Analisis proses adsorpsi parasetamol dengan adsorben PAC dilakukan berdasarkan pengaruh konsentrasi adsorben, konsentrasi polutan dan pH. Berdasarkan hasil penelitian, PAC efektif menghilangkan parasetamol dengan efisiensi penyisihan COD sebesar 70,30%. Sedangkan adsorben lainnya kurang efektif karena efisiensi penyisihan COD bernilai negatif. Adsorpsi dengan PAC efektif menyisihkan parasetamol pada pH netral dan asam. Adsorben PAC memiliki potensi penggunaan kembali sebanyak dua kali dengan nilai efisiensi penyisihan >40%.

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Emerging contaminants (ECs) is a pollutant that is becoming a concern. Paracetamol is an emerging contaminant which can cause pollution in the body of water as well as have toxicity that can affect health and environment. Adsorption is an alternative method of ECs removal which is quite promising because it is highly-efficient, cost effective, and easy to operate. This study was conducted to compare the effectiveness of paracetamol adsorption process by various types of adsorbents, evaluate the effect of pH operational parameters on the effectiveness of the adsorption process, and evaluate the potential reuse of adsorbents. Quantification of paracetamol was carried out by COD spectrophotometric method and the solid-liquid separation method used was the separation method with a syringe filter. Removal of paracetamol used various adsorbents, namely powdered activated carbon (PAC), natural zeolite, fly ash, alum sludge, calcined sludge, and acid activated sludge. Analysis of the paracetamol adsorption process with PAC adsorbent was carried out based on the effect of the concentration of the adsorbent, the concentration of pollutants and pH. Based on the results of the study, PAC effectively removes paracetamol with COD removal efficiency of 70.30%. While other adsorbents are less effective because the efficiency of COD removal is negative. Adsorption with PAC effectively removes paracetamol at neutral and acidic pH. PAC adsorbent has a potential for reuse as much as one time with the allowance efficiency value > 40%.

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"Food security is the main problem in food production in Indonesia. One of the reason that the food from corn isis not safe to be consumed caused by contaminated by aflatoxins wich produced by fungi...."

"ABSTRAKDi Indonesia, banyak ditemukan permasalahan pencemaran di badan air akibat aktivitas industri, salah satunya adalah industri tekstil. Air limbah yang dihasilkan oleh industri tekstil umumnya mengandung zat warna (dye) dari proses pewarnaan, pencelupan, pencucian, dan lain sebagainya. Salah satu zat warna yang banyak digunakan adalah zat warna Methyl Orange. Dari aspek teknis, permasalahan dalam pengolahan air limbah terdapat pada kesulitan teknologi konvensional dalam mereduksi kandungan zat warna sebagai refractory contaminant. Oleh karena itu, pada penelitian ini digunakan proses Fenton heterogen dengan menggunakan katalis limbah serbuk besi dan oksidan H2O2. Limbah serbuk besi yang digunakan, diperoleh dari kegiatan pemotongan besi pada proses konstruksi. Serbuk besi dikarakterisasi menggunakan SEM-EDX, XRD, PSA, AAS, dan Spektrofotometer untuk melihat kondisi morfologi, komposisi mineral, distribusi partikel, dan kandungan besi totalnya. Hasil uji parametrik pada penelitian ini menunjukkan bahwa semakin tinggi konsentrasi katalis limbah serbuk besi dan semakin tinggi temperatur dalam reaksi, maka semakin tinggi laju penghilangan senyawa Methyl Orange. Namun, semakin tinggi konsentrasi H2O2, konsentrasi polutan, dan pH larutan, maka semakin rendah laju penghilangan senyawa Methyl Orange. Dari hasil pengujian diperoleh bahwa proses Fenton heterogen menggunakan katalis limbah serbuk besi efektif dalam menyisihkan senyawa Methyl Orange hingga mencapai persentase penyisihan 97,10%. Sebagai kesimpulan, katalis serbuk besi dari kegiatan konstruksi dapat digunakan sebagai katalis Fenton heterogen untuk mendegradasi senyawa Methyl Orange.

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ABSTRACT

In Indonesia, there are many pollutants found in water bodies related to industrial activities, one of which is the textile industry. Waste water produced by the textile industry generally contains dyes (dyes) from the coloring, dyeing, washing, and so on. One of the dyes that are widely used is the Methyl Orange dye. From a technical aspect, the problem in wastewater treatment is related to conventional technology in reducing the content of dyes as refractory contaminants. Therefore, in this study a heterogeneous Fenton process is used that utilizes iron powder waste as catalyst and H2O2 oxidants. Iron powder waste is obtained from iron cutting activities in the construction site. The powder was characterized using SEM-EDX, XRD, PSA, AAS, and Spectrophotometer to see the morphological conditions, mineral composition, particle distribution, and total iron content. The parametric test results in this study indicate that the higher the concentration of the catalyst of iron powder and the higher the reaction temperature, the higher the rate of removal of the Methyl Orange compounds. However, the higher the concentration of H2O2, the concentration of pollutants, and the pH of the solution, the lower the rate of removal of the Methyl Orange compounds. From the test results, it is obtained that heterogeneous Fenton process using a iron powder waste catalyst effective in removing the composition of Methyl Orange to reach a 97.10% removal percentage. In conclusion, the multipurpose catalyst from the construction program can be used as a heterogeneous Fenton catalyst to degrade Methyl Orange compounds."

"Keberadaan Antimicrobial Resistance (AMR) di lingkungan mengalami peningkatan seiring berjalannya waktu. AMR mulai ditemukan terkandung pada air tanah sebagai salah satu pencemar mikrobiologis. Kota Metro sebagai mayoritas pengguna air tanah dari sumur bor dan gali, yakni mencapai 90% perlu waspada terhadap keberadaan AMR. Penelitian ini bertujuan untuk menganalisis konsentrasi E. coli dan E. coli resistan terhadap cefotaxime serta rasio perbandingannya, menganalisis pengaruh faktor curah hujan, suhu, kelembaban, pH, total padatan terlarut, dan kekeruhan terhadap kadar konsentrasi, serta memberikan rekomendasi tindakan pengelolaan air tanah berdasarkan prevalensi bakteri E. coli dan E. coli resistan di Kota Metro. Penelitian ini dilakukan di 11 lokasi selama bulan November – Februari menggunakan IDEXX Colilert-18 dan Quanti-Tray/2000 untuk mendeteksi konsentrasi E. coli dan E. coli resistan melalui penggunaan antibiotik cefotaxime. Hasil penelitian menunjukkan sebanyak 67% air tanah mengandung E. coli dan sebanyak 27% di antaranya bersifat resistan terhadap cefotaxime. Persentase keberadaan (1) E. coli dan (2) E. coli resistan dengan kategori risiko sangat tinggi (>100 MPN/100 ml) mencapai (1) 24% dan (2) 0%; risiko tinggi (>10 – 100 MPN/100 ml) (1) 13% dan (2) 2%; risiko menengah (1 – 10 MPN/100 ml) (1) 31% dan (2) 16%; dan risiko rendah (<1 MPN/100 ml) (1) 33% dan (2) 82%. Peningkatan konsentrasi E. coli berkorelasi dengan faktor curah hujan, suhu, dan kekeruhan sedangkan peningkatan konsentrasi E. coli resistan berkorelasi dengan faktor curah hujan. Hubungan korelasi didapatkan melalui uji peringkat Spearman berdasarkan signifikansi (p-value) < 0,05. Berdasarkan hasil prevalensi, masyarakat dapat meminimalisasi konsentrasi dengan cara memodifikasi kondisi fisik sumur agar sesuai dengan standar yang telah ditetapkan oleh Kementerian PUPR dan SNI. Masyarakat juga dapat menggunakan filter sederhana, misalnya filter granular untuk memfiltrasi air sebelum digunakan. Walaupun langkah tersebut dilakukan, perlu diingat bahwa terdapat faktor pengaruh lain yang dapat memengaruhi konsentrasi E. coli dan E. coli resistan, salah satunya adalah kontaminan di sekitar sumur, seperti feses manusia, feses hewan ternak, dan sisa air buangan rumah tangga. Maka, peran pemerintah dalam penyediaan layanan fasilitas air bersih menjadi salah satu langkah untuk mengurangi penggunaan air tanah yang terkontaminasi.

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The prevalence of Antimicrobial Resistance (AMR) in the environment has been increasing over time. AMR has been detected in groundwater as one of the microbiological pollutants. Metro City, where the majority relies on groundwater from boreholes and wells, accounting for 90%, must be vigilant against AMR. This study aims to analyze the concentration of E. coli and cefotaxime-resistant E. coli, along with their ratio, to analyze the influence of rainfall, temperature, humidity, pH, total dissolved solids, and turbidity on concentration levels, and to provide recommendations for groundwater management based on the prevalence of E. coli and cefotaxime-resistant E. coli in Metro City. The research was conducted at 11 locations from November to February using the IDEXX Colilert-18 and Quanti-Tray/2000 to detect the concentration of E. coli and cefotaxime-resistant E. coli through the use of antibiotics. The results showed that 67% of the groundwater contained E. coli, with 27% being resistant to cefotaxime. The percentage of presence of (1) E. coli and (2) cefotaxime-resistant E. coli with very high-risk categories (>100 MPN/100 ml) reached (1) 24% and (2) 0%; high risk (>10 – 100 MPN/100 ml) (1) 13% and (2) 2%; moderate risk (1 – 10 MPN/100 ml) (1) 31% and (2) 16%; and low risk (<1 MPN/100 ml) (1) 33% and (2) 82%. The increase in E. coli concentration correlated with rainfall, temperature, and turbidity, while the increase in cefotaxime-resistant E. coli concentration correlated with rainfall. Correlation relationships were determined through Spearman rank tests based on significance (p- value) < 0.05. Based on the prevalence, the community can minimize concentrations by modifying the physical conditions of wells to meet the standards set by the Ministry of Public Works and SNI. The community can also use simple filters, such as granular filters, to filter water before use. Despite these measures, it should be noted that there are other influencing factors that can affect the concentration of E. coli and cefotaxime-resistant E. coli, such as contaminants around the well, such as human feces, livestock feces and household wastewater. Therefore, the government's role in providing clean water facilities becomes one of the steps to reduce the use of contaminated groundwater."

"This textbook employs a technical and quantitative approach to explain subsurface hydrology and hydrogeology, and to offer a comprehensive overview of groundwater-related topics such as flow in porous media, aquifer characterization, contaminant description and transport, risk assessment, and groundwater remediation. It describes the characterization of subsurface flow of pristine and polluted water and provides readers with easily applicable tools for the design of water supply systems, drinking-water source protection, and remediation interventions. Specific applications range from groundwater exploitation as a drinking water supply to the remediation of contaminated aquifers, from the definition and safeguarding of drinking-water sources to the assessment of human health risks in connection with groundwater contamination events.The book represents an ideal learning resource for upper-undergraduate and graduate students of civil engineering, environmental engineering, and geology, as well as practitioners in the fields of water resource management and environmental protection who are interested in groundwater engineering and technical hydrogeology."