Effectiveness of combined upflow roughing filter and upflow slow sand filter to reduce turbidity in Citarum water as a source of drinking water

Turbidity of Citarum River was high, fluctuating and used as drinking water source by people and PDAM (Regional Drinking Water Company). The aim of this study was to determine the ability of upflow roughing filter (URF) and upflow slow sand filter (USSF) in reducing turbidity. It was called multistage filtration (MSF). MSF was varied with and without settler. Gravel diameters and perviousness as follows: 0.5 cm was 0.243, 1 cm: 0.264, 2 cm: 0.265, 5 cm: 0.302 or just 24 - 30% of total URF’s volume. When settler was run with surface loading 0.5 m3/m2/hour, flowrate 0.67 l/minute, turbidity 321.16 - 3,496.53 NTU, efficiency was 57.9 - 96.2%. Settler reduced turbidity significantly. URF1 enhanced turbidity removal. However, URF2, URF3, USSF were not effective. In experiment without settler, turbidity was 130.78 - 533.00 NTU but its reduction in URF1 was bad. But in URF2 turbidity was almost the same as in experiment with settler. Efficiency was 41.9 - 89.1%. Here URF1 and URF2’s function were almost the same as settler and URF1. URF3 was ineffective, can be removed. USSF was still needed even though only able to reach 10-25 NTU. URF and USSF contributed to higher efficiency of turbidity removal.

Slow Sand Filter untuk Pengolahan Air di Desa Pekauman Ulu, Kalimantan Selatan

Pekauman Ulu Village is one of the villages crossed by the Martapura river, where the water is used by the people of this village for their daily activities. Pekauman Ulu Village is a densely populated area which is flooded every year. The water is very turbid with an unpleasant smell, and consuming this water often makes some people get diarrhea. Thus, a simple technology is needed to treat this river water into clean water. This activity aims to build Slow Sand Filter (SSF) units as a means of providing clean water for people in Pekauman Ulu Village. The activity is conducted in three parts: initial dissemination, training, and evaluation. Based on the survey done to the people joining the training, 95.25% of the people said that they were satisfied with the water being treated by SSF. As for the performance of the SSF itself, turbidity measurement of water samples showed that the turbidity of water filtered by the SSF unit reduced from an average of 41.7 NTU to 2.3 NTU. It can be concluded that this community development program has successfully addressed the need for clean water for people in Pekauman Ulu Village.

Effectiveness of combined up-flow roughing filter and up-flow slow sand filter to reduce turbidity in Citarum water as a source of drinking water

The turbidity of the Citarum River was high, fluctuating, and used as a drinking water source by PDAM (Regional Drinking Water Company). This study aimed to determine the ability of a combined up-flow roughing filter (URF) and an up-flow slow sand filter (USSF) in reducing turbidity, called multistage filtration (MSF). MSF was varied with and without settlers. Gravel diameters and perviousness: 0.5 cm was 0.243, 1 cm: 0.264, 2 cm: 0.265, 5 cm: 0.302 or 24-30% of URF’s volume. When settler was run with surface loading 0.5 m3/m2/hour, flowrate 0.67 l/minute, turbidity 321.16-3,496.53 NTU, the efficiency was 57.9-96.2%. Settler reduced turbidity significantly. URF1 enhanced turbidity removal. However, URF2, URF3, USSF were not effective. In an experiment without a settler, turbidity 130.78-533.00 NTU, but its reduction in URF1 was bad. In URF2 turbidity was almost the same as in the experiment with the settler. Efficiency was 41.9-89.1%. Here URF1 and URF2’s functions were almost the same as settler and URF1. URF3 was ineffective, can be removed. USSF was needed even though only able to reach 10-25 NTU. URF and USSF contributed to the higher efficiency of turbidity removal.

Analysis of Clean Water Treatment with Slow Sand Filter Using Beach Sand and Quartz Sand

The purpose of this study is to analyze the quality of Kapuas River water before and after processing and to analyze the comparative effectiveness of beach sand and quartz sand in slow sand filters with the thickness is 110 cm for processing Kapuas River water. The research method that used is the down flow method. The parameters that measured were pH, Turbidity, TDS, Organic Substances, Fe, and Total Coliform. The initial pH parameter is 5.6 and the results of filtering with beach sand 1, beach sand 2, silica sand 1, and silica sand 2 are 7; 6.9; 7,1; 6.9. The initial turbidity parameter was 35.2 and the filtering result are 1.21; 1.7; 16.0; 2.87. The initial TDS parameter was 122.4 and the filtering result was 90.5; 88.1; 127.5; 80.5. The initial Organic Substance parameter was 102.71 and the result after filtering was 77.92; 63.82; 98.99; 98.17. Keywords: beach sand, clean water, slow sand filter, quartz sand AbstrakTujuan Penelitian ini untuk menganalisa kualitas Air Sungai Kapuas sebelum maupun sesudah pengolahan dan menganalisa perbandingan efektivitas pasir pantai dan pasir kuarsa pada Saringan Pasir Lambat (SPL) dengan ketebalan 110 cm dalam mengolah air Sungai Kapuas. Metode penelitian yang digunakan adalah metode down flow. Parameter yang diukur adalah pH, Kekeruhan, TDS, Zat Organik, Kadar Fe, dan Total Coliform. Parameter pH awal 5,6 dan hasil penyaringan dengan pasir pantai 1, pasir pantai 2, pasir silika 1, dan pasir silika 2 adalah 7; 6,9; 7,1; 6,9. Parameter Kekeruhan awal 35,2 dan hasil penyaringan adalah 1,21; 1,7; 16,0; 2,87. Parameter TDS awal 122,4 dan hasil penyaringan adalah 90,5; 88,1; 127,5; 80,5. Parameter Zat Organik awal 102,71 dan hasil penyaringan adalah 77,92; 63,82; 98,99; 98,17. Kata Kunci: air bersih, pasir kuarsa, pasir pantai, saringan pasir lambat

Improved Performance of Water Supply System Sawah Liek and Tungku Sadah PDAM Kota Padang Panjang

Sawah Liek and Tungku Sadah have increased turbidity during the rainy season, 629 NTU. Sawah Liek and Tungku Sadah are 845 m and 888 m above sea level and flow by gravity at Sungai Andok Reservoir, 802 m. Sawah Liek has a production of 5 l/s for 428 customers and Tungku Sadah 10 l/s for 2,806 customers. One of the causes of turbidity fluctuation during rain is planting activities which degrade the area of land cover, increase runoff and minimize infiltration into the area that the flow from the source decreases every year. Water consumption for customers of Sawah Liek is 202 l/person/day and Tungku Sadah 62 l/person/day is smaller than the category of small towns of 130 l/person/day. The installed slow sand filter is unable to handle the turbidity during the rain in exceeds of 50 NTU. The maximum produced by the installed slow sand filter is 2.67 l/s. Changes in the function of the filter installed at a high-speed sand filter can increase production to 26.7 l/s and overcome turbidity fluctuations can be accomplished by improving the system with a complete treatment facility or an incomplete processing facility consisting of a screen, a large chamber, coagulation, and flocculation, filtration and disinfection.

Simultaneous Removal of Iron and Hexavalent Chromium Via Slow Sand Filter Inoculated With Thiobacillus ferrooxidans and Waste management

Many places have common physical, biological, and chemical hazards and heavy metals contamination in drinking water is very important to study especially near industrial areas and mining sources. Application of microbes along with other physicochemical techniques can prove to be the suitable remediation technology for the removal of metals from water. This study aimed to remove iron and hexavalent chromium from water using slow sand filters inoculated with iron-oxidizing bacteria Acidothiobacillus ferrooxidans. An experiment was performed for 37 days under controlled conditions, a water sample was prepared synthetically and another sample was collected from water filtration plant from Abbottabad city in KP Province- Pakistan and influents and effluents were tested for different parameters like pH, turbidity, hardness, total plate count, total dissolved solids, electrical conductivity and analysis of iron and hexavalent chromium in water. Acidothiobacillus ferrooxidans culture was isolated from soil using the differential iron media i.e. 9K medium and was inoculated into sand filters. At the end of the experiment, the removal efficiency of ferrous iron was about 52% and that of hexavalent chromium was 60.2%. In simultaneous treatment, it was observed that removal efficiency of iron was about 68% while that of hexavalent chromium was about 93% suggesting that slow sand filters were more effective for the removal of hexavalent chromium than iron. Hence, the designed slow sand filters were able to reduce the concentration of hexavalent chromium more efficiently than ferrous iron. And it was observed that slow sand filters can effectively remove ferrous iron and hexavalent chromium from water if they are inoculated with respective bacteria. Key,words,. Hexavalent Chromium, Iron Oxidizing, Sand Filters, Acidothiobacillus ferrooxidans, waste management.