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Abstrak :
Seiring bertambahnya penduduk, meningkatkan kebutuhan air bersih yang menyebabkan manusia terus melakukan pemompaan air tanah secara terus-menerus. Masalah pada penelitian ini adalah dengan dipompanya air tanah secara berlebih akan menyebabkan rongga-rongga di dalam tanah menjadi kosong, sehingga mempermudah zat polutan masuk dan mencemari air di dalamnya. Hal tersebut diperparah dengan aktivitas manusia yang tidak memperhatikan limbah yang mereka hasilkan, seperti menjaga sistem sanitasi dengan baik. Tujuan penelitian adalah untuk menganalisis penyebab penurunan kualitas air tanah dan dan upaya yang dapat dilakukan dalam rangka menigkatkan kualitas air tanah. Metode penelitian ini adalah metode campuran yang terdiri atas metode kuantitatif dan kualitatif. Hasil penelitian ini menunjukan kualitas air tanah di wilayah perkotaan tidak memenuhi standar baku mutu air minum untuk parameter biologi dengan indikator Total koliform karena faktor sanitasi yang buruk. Kesimpulan pada penelitian adalah upaya menjaga kualitas air tanah dengan mengubah persepsi masyarakat, mengubah kapasitas pemompaan air tanah, dan memperbaiki faktor sanitasi. ......As the population increases, the need for clean water increases which causes humans to continue pumping groundwater continuously. The problem in this study is that excessive pumping of groundwater will cause voids in the soil to become empty, making it easier for pollutants to enter and contaminate the water in it. This is exacerbated by human activities that do not pay attention to the waste they produce, such as maintaining proper sanitation systems. The objective of this research is to analyze the causes of the decline in groundwater quality and the efforts that can be made to improve the quality of groundwater. The methods research is a mixed method consisting of quantitative and qualitative methods. The results of this study indicate that the quality of groundwater in urban areas does not meet drinking water quality standards for biological parameters with the Total coliform indicator due to poor sanitation. The conclusion of the research is efforts to maintain groundwater quality by changing people's perceptions, changing groundwater pumping capacity, and improving sanitation factors.

Abstrak :
Saringan pasir lambat merupakan salah satu metode pengolahan yang menjadi pilihan karena alat dan bahan yang mudah didapat, pengoperasiannya yang mudah, serta keefektifannya menyisihkan kontaminan dalam air yang baik. Untuk meningkatkan kehandalan penyisihan saringan pasir lambat, dapat dilakukan pengolahan pendahuluan salah satunya prasedimentasi. Tujuan dari penelitian ini adalah untuk membandingkan kehandalan saringan pasir lambat dengan proses prasedimentasi dan saringan pasir lambat tanpa prasedimentasi dalam menyisihkan besi, mangan, kekeruhan dan fekal koliform. Dibuat dua filter dari drum berkapasitas 150 liter dengan spesifikasi yang sama. Media filter direncanakan dengan spesifikasi yang sama, namun pada saat sieve analysis didapatkan untuk filter acuan, lapisan pasir 1 nilai ES = 0,2 mm dan UC = 3 & pada lapisan pasir 2 nilai ES = 0,45 dan UC = 2,2. Sedangkan filter I lapisan pasir 1 nilai ES = 0,15 mm, UC = 2,33 dan lapisan pasir 2 nilai ES = 0,4 mm dan UC = 1,88. Kedua filter dioperasikan secara intermittent dalam skala pilot. Sumber air baku yang dijadikan objek studi adalah air Danau Mahoni Universitas Indonesia karena tingkat pencemarannya yang berada di atas baku mutu air minum. Kehandalan filter acuan dengan perlakukan prasedimentasi untuk penyisihan besi sebesar 95%-97,94%, mangan 50-80%, kekeruhan 92,15-97,78 %, dan fekal koliform 90- 99,57%. Kehandalan efisiensi penyisihan filter I tanpa prasedimentasi untuk parameter besi tidak dapat disisihkan, mangan 50-93,33%, kekeruhan 50,28-94,26 %, dan fekal koliform 82,61-99,86%. ......Slow sand filter is one of the processing methods that is chosen because of easy-to-obtain tools and materials, easy to operate, and its effectiveness of removing contaminants in good water.To improve the reliability of slow sand filter removal, preliminary processing can be carried out, one of which is pre-sedimentation. The purpose of this study was to compare the reliability of slow sand filters with pre-sedimentation processes and slow sand filters without pre-sedimentation in removing iron, manganese, turbidity and faecal coliform. Two filters are created from a 150 liter drum with the same specifications. Media filters are planned with the same specifications, but when sieve analysis is obtained the results are: for reference filter, sand layer 1 ES value = 0.2 mm and UC = 3 & in sand layer 2 ES values = 0.45 and UC = 2.2 . While filter I sand layer 1 ES value = 0.15 mm, UC = 2.33 and sand coating 2 ES values = 0.4 mm and UC = 1.88. Both filters are operated intermittently on a pilot scale. The raw water source used as the object of study is the Lake Mahoni, University of Indonesia because of the level of pollution that is above the drinking water quality standard. Removal efficiency of reference filter with treatment of pre-sedimentation for iron removal was 95%-97.94%, manganese 50-80%, turbidity 92.15-97.78%, and faecal coliform 90-99.57%. The efficiency of filter I without prasedimentation for iron parameters cannot be excluded, manganese is 50-93.33%, turbidity 50.28 - 94.26%, and fecal coliform 82.61-99.86%.

Abstrak :
Saat ini TPA Cipayung tidak memiliki unit pengolahan lindi, sehingga lindi dialirkan menuju Kali Pesanggrahan. Penelitian ini bertujuan untuk menganalisis potensi fitoremediasi yang ditinjau dari pengaruh persentase luas tutupan dan jenis tanaman air yang optimal dalam penyisihan pencemar dari lindi TPA Cipayung. Tahapan penelitian terdiri dari observasi lapangan, range finding test, adaptasi dan fitoremediasi. Penelitian ini menggunakan metode fitoremediasi dengan tanaman eceng gondok dan kayu apu. Eceng gondok mampu menyisihkan parameter TDS, TSS, COD, BOD, dan total koliform berturut-turut sebesar 33%, 32%, 20%, 25%, dan 39%, sedangkan kayu apu sebesar 24%, 28%, 25%, 34%, dan 43%. Berdasarkan uji statistik, persentase luas tutupan tanaman memiliki korelasi positif tidak signifikan (sig >0,05) dengan persentase penyisihan pencemar yaitu TSS, COD dan BOD. Hubungan korelasi didapatkan jika semakin besar persentase luas penutupan tanaman, maka akan semakin besar nilai persentase penyisihan parameter pencemar. Selain itu, hasil uji korelasi antara jenis tanaman dengan penurunan persentase penyisihan pencemar menujukan korelasi negatif pada parameter COD, BOD, dan total koliform. Hasil dari penelitian ini yaitu eceng gondok lebih baik dalam menurunkan pencemar dibandingkan kayu apu. Penerapan fitoremediasi pada TPA Cipayung direncanakan pada unit constructed wetland. ...... Cipayung Landfill does not have a leachate treatment, so the leachate flows into the Pesanggrahan River. This study aims to analyze the potential of phytoremediation with the percentage of the cover area and the optimal type of aquatic plants in removing pollutants. The research stages included observation, range finding test, adaptation and phytoremediation. This study used phytoremediation with water hyacinth and water lettuce. Water hyacinth was able to remove TDS, TSS, COD, BOD, and total coliform parameters by 33%, 32%, 20%, 25%, and 39%, while water lettuce was 24%, 28%, 25%, 34%, and 43%. Based on statistical tests, the percentage of plant cover area has an insignificant positive correlation (sig>0,05) with the removal efficiency TSS, COD and BOD. The correlation relationship is if the more significant the percentage of plant cover area, the greater the removal efficiency pollutant. The correlation test results between plant types and the decrease in the percentage of pollutant removal showed a negative correlation in COD, BOD, and total coliform parameters. This study concludes that water hyacinth is better at reducing contaminants than water lettuce. The constructed wetland unit plans the application of phytoremediation in the Cipayung landfill.

Abstrak :
Standar Kementerian Kesehatan menyatakan bahwa setiap makanan dan minuman tidak boleh mengandung Escherichia coli. Tujuan penelitian adalah menentukan kualitas mikrobiologis dari makanan siap saji dan minuman yang dijajakan di kantin kampus FMIPA UI Depok. Sebanyak 15 sampel, terdiri dari 10 jenis makanan siap saji, empat jus yang berbeda, dan air keran diperkaya dalam medium Buffered Peptone Water BPW sebelum diuji koliform. Uji koliform dari setiap sampel dilakukan pada medium kromogenik Chromocult Coliform Agar - Enhanced Selectivity CCA - ES dan Harlequin E. coli Coliform Agar HEC dan medium fluorogenik Readycult Coliform 100 RC 100 pada suhu 37oC. Hasil menunjukkan bahwa semua sampel mengandung bakteri koliform non - E. coli dan 12 di antaranya mengandung Escherichia coli. Isolasi dari sampel memperoleh 12 strain E. coli dan 15 isolat koliform non-E. coli. Uji koliform fekal dilakukan dengan menggunakan medium RC 100 pada suhu 44,5oC serta diperkuat dengan uji indol menggunakan reagen Kovac rsquo;s. Hasil uji menunjukkan bahwa E. coli yang terdapat pada 12 sampel berasal dari fekal. Hanya 7 dari 15 isolat koliform non - E. coli merupakan koliform fekal non - E. coli. Berdasarkan hasil penelitian yang diperoleh dapat disimpulkan bahwa kualitas mikrobiologis dari makanan dan minuman siap saji kantin FMIPA UI tidak memenuhi standar dari Kementerian Kesehatan. ......The standards from the Ministry of Health state that food and drinks should be free of Escherichia coli. The aim of this research was to assess the microbiological quality of ready to eat foods and drinks that were offered at a canteen in the Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok. Fifteen samples comprising of 10 different foods, four different juices, and tap water were enriched in buffered peptone water BPW before tested for the presence of coliforms using two chromogenic media Chromocult Coliform Agar Enhanced Selectivity CCA ES and Harlequin E. coli agar HEC and a fluorogenic medium Readycult Coliform 100 RC 100 at 37oC. Results showed that all samples contained non E. coli coliforms and 12 of them contained Escherichia coli. Twelve E. coli strains and 15 non E. coli coliform isolates were isolated. Fecal coliform tests were conducted for the E. coli strains and coliform isolates by performing a coliform test with Readycult coliform 100 at 44.5oC. The tests were strengthened with an indole test that uses a Kovac rsquo s reagent. The tests showed that the isolated E. coli from 12 samples were of fecal origin while only 7 out of 15 coliform isolates were fecal non E. coli coliforms. It was concluded that the microbiological quality of the canteen rsquo s ready to eat food and drinks did not fulfill the standards from the Ministry of Health.

Abstrak :
Penelitian telah dilakukan untuk membandingkan efektivitas penggunaan medium fluorogenik dan medium standar Multiple Tube Fermentation (MTF) pada uji koliform sampel minuman es. Penelitian dilakukan sejak Mei hingga Oktober 2007 di laboratorium Mikrobiologi, Departemen Biologi FMIPA-UI, Depok. Medium fluorogenik yang digunakan adalah fluorocult LMX broth. Medium standar MTF yang digunakan adalah lactose broth, brilliant green lactose bile broth, dan endo agar. Sampel minuman es yang diuji berasal dari wilayah Jakarta Selatan dan Depok, sebanyak 40 buah. Hasil uji menggunakan medium fluorogenik menunjukkan 39 (97,5%) sampel mengandung koliform dengan tabung positif sebanyak 542 buah. Hasil uji menggunakan medium standar MTF menunjukkan 37 (92,5%) sampel mengandung koliform dengan tabung positif sebanyak 500 buah. Sebanyak 13 sampel memiliki nilai Most Probable Number (MPN) koliform lebih tinggi pada medium fluorogenik dibandingkan pada medium standar MTF. Sebanyak 14 sampel terdeteksi mengandung E. coli pada medium fluorogenik namun tidak terdeteksi pada medium standar MTF. Hasil penelitian menunjukkan penggunaan medium fluorogenik untuk uji koliform pada sampel minuman es relatif lebih efektif dari medium standar MTF.

Abstrak :
Water is one of the very necessary essence in human life aspects, which education is being one of them. As one of the best universities in Indonesia, University of Indonesia provides and find some ways to save clean water by minimizing the use amount of it, especially to reduce groundwater uses, as its noted in the UI GreenMetric purpose of clean water category. However, one of the faculties in UI, which is the Faculty of Nursing (FIK UI), have used a massive amount of groundwater in 2018 and 2019, with the amount number being 2.115.240 litres and 2.010.960 litres respectivel. FIK UI must find an alternative of water source other than groundwater, such as surface water. The purpose of this research is to design a water treatment system using the Agathis UI Lake water as the source to serve FIK UI need of clean water until 2042. The operation unit being the main focus of this designing process is the filtration using slow sand filter with silica sand and granular activated carbon as the filter medias, which both known effective to reduce iron, manganese, and fecal coliform concentration in raw water as the three parameters are important criterias in the Indonesias Health Minister Rule number 492 year 2010 about The Criterias of Drinking Water Quality. The amount of clean water need of FIK UI projected is 2,82 L/s. This design based on literatures and legal standards, especially in deciding the removal efficiency of the three parameters being said before of the slow sand filter. Based on the review of literatures, journals, and experiment results being done by others, the slow sand filter of this water treatment design can reach the removal efficiency of iron, manganese, and fecal coliform by 95,07%; 97,09%; and 99% respectively if the filter have 60 cm thick of silica sand above and 40 cm of granular activated carbon underneath the sand. One intake unit, two suction wells with two centrifugal pumps, one conveyance system, two slow sand filter units, one disinfection and reservoir unit, and two filter media cleaning units created to produce 3,8 L/s of clean water for FIK UI until 2042.

Abstrak :
Jumlah layanan air minum melalui depot air minum di Kota Kupang meningkat dengan rata-rata 1,44 setiap tahun sejak 2010, sementara tidak terdapat jaminan kualitas air minum isi ulang memenuhi syarat setiap saat. Hasil pemeriksaan sampel air minum isi ulang di Kota Kupang tahun 2013 menunjukkan 37,5% tercemar mikroba. Tujuan penelitian ini adalah menganalisis cemaran mikroba dan mengetahui determinan cemaran Escherichia coli (E. coli) dan total koliform pada air minum isi ulang. Penelitian ini menggunakan desain studi potong lintang periode Januari - Maret 2015. Populasi penelitian berjumlah 51 depot air minum yang ditentukan menggunakan teknik total sampling. Analisis data dilakukan secara univariat, analisis bivariat menggunakan uji regresi logistik sederhana, dan analisis multivariat menggunakan regresi logistik berganda. Hasil penelitian terhadap 51 depot air minum menunjukkan air minum telah tercemar mikroba sebanyak 26 depot air minum (51%), tercemar E. coli 33,33%, dan tercemar total koliform 51%. Deteminan cemaran mikroba dengan uji bivariat adalah pengetahuan (nilai p = 0,01), sikap operator (nilai p = 0,05). Sedangkan determinan cemaran mikroba uji multivariat adalah pengetahuan operator (nilai p = 0,026), kebersihan operator (nilai p = 0,05) dan sanitasi depot air minum (nilai p = 0,044). Variabel yang paling dominan memengaruhi cemaran mikroba adalah pengetahuan, kebersihan operator, dan sanitasi depot air minum.

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Amount of drinking water services through drinking water depots in Kupang City is increasing in avarage of 1.44 every year since 2010, meanwhile there is no guarantee that refill drinking water quality meets any requirement every time. Results of refill drinking water sample in Kupang City in 2013 showed the water was 37.5% contaminated by microbes. This study aimed to analyze microbial contamination and determine determinants of Escherichia coli (E. coli) and total Coliform on refill drinking water. This study used cross sectional design on January - March 2015. The population was 51 depots determined using total sampling technique. Data analysis was conducted in univariate, bivariate using simple logistic regression test and multivariate using multiple logistic regression test. Results showed drinking water contaminated by microbes worth 26 depots (51%), by E. coli 33.33% and by total Coliform 51%. Microbial contamination determinants using bivariate were knowledge (p value = 0.01) and behavior of operator (p value = 0.05). Meanwhile, microbial contamination determinants conducting multivariate were knowledge (p value = 0.026), hygiene of operator (p value = 0.05) and depot sanitation (p value = 0.044). Most dominating variables influencing microbi.

Abstrak :
ABSTRAK
Kualitas Mikrobiologi merupakan parameter yang sangat penting pada air minum. Keberadaan mikroba dalam air minum bisa menjadi kasus kesehatan masyarakat yang dapat menyebabkan banyak korban. Karena itu kualitas mikrobiologi dalam air harus sangat diperhatikan. Kualitas Mikrobiologi biasa dinyatakan dalam koliform. Residual klorin merupakan bahan kimia yang paling umum digunakan sebagai disinfektan mikroba. Kehadiran klor bebas dipercaya mampu mencegah pertumbuhan mikroba didalam air. Oleh karena itu perlu untuk diketahui pengaruh residual klorin terhadap kualitas mikrobiologi, untuk menjamin air bersih bebas dari mikroba. Parameter lain seperti kekeruhan dan total zat organik juga dianalisa pengaruhnya terhadap kualitas mikrobiologi.

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ABSTRACT
Microbiological quality is a very important parameter in drinking water. The existence of microbe especially pathogen in drinking water could become a case of public health that causes a lot of victims. Therefore microbiological quality in the water should be kept. Generally microbiological quality in the water expressed in total coliform. Residual chlorine is the most common chemicals used as disinfectants of microorganism in water. The presence of free chlorine is believed to prevent microbiological growth in water. Therefore it is necessary to note the influence of residual chlorine to microbiological quality, to ensure the clean water free from pathogens. Other parameters such as turbidity and total organic matter were also analyzed its effect on microbiological quality.