No abstract

Instalasi Pengolahan Air Limbah (IPAL) di kawasan Universitas Pertamina beroperasi sudah sangat baik. Adanya program green campus dengan indikator daur ulang air limbah menjadi salah satu tantangan dalam meningkatkan kualitas effluent WWTP tersebut dengan menambahkan unit advanced treatment. Tujuan dari studi ini adalah untuk merancang unit-unit pengolahan advanced dan perkiraan hasil effluent dan biaya yang dibutuhkan. Studi ini dilakukan dengan melakukan survey lapangan, pengambilan data kualitas air, dan studi literatur. Dengan debit (Qpeak) perencanaan 8,45 m3/jam, luas lahan yang dibutuhkan untuk penambahan advanced treatment adalah 105,85 m2. Advanced treatment terdiri dari 1 unit bak ekualisasi, 2 unit saringan pasir lambat, 1 unit bak pencuci pasir, 2 unit membran mikrofiltrasi, 1 unit proses desinfeksi, dan 2 unit reservoir. Dengan adanya unit-unit tersebut diharapkan kualitas effluent memenuhi standard kualitas air minum dengan nilai TSS 0 mg/L, Amonia (NH3-N) 0,35 mg/L, Zat Organik (KmnO4) 0,513 mg/L, Zat Terlarut (TDS) 23 mg/L, dan Total Koliform 0/100 ml sampel. Total biaya yang dibutuhkan untuk membangun advance treatment untuk konsumsi air keran adalah Rp 374.727.334.The wastewater treatment plant (WWTP) in Universitas Pertamina’s area is operating very well. The existence of a green campus program with a wastewater recycling indicator has become one of the challenges. Improving the WWTP effluent quality by adding an advanced treatment unit. This study aims to design advanced processing units and estimate the effluent yields and required costs. This study was conducted by conducting a field survey, collecting water quality data, and literature study. With planning discharge (Qpeak) of 8.45 m3/hour, the land area required for the addition of advanced treatment is 105.85 m2. Advanced treatment consists of 1 unit of Equalization Tank, 2 units of slow sand filter, 1 unit of sand washer, 2 units of microfiltration membrane, 1 disinfection body, and 2 reservoir units. These units it is expected to make effluent quality meets the drinking water quality standards with a TSS value of 0 mg/L, Ammonia (NH3-N) 0.35 mg/L, Organic Substances (KmnO4) 0.513 mg/L, Total Dissolved Solids (TDS) 23 mg/L, and Total Coliform 0 Total/100 ml of sample. The total cost needed to build an advance treatment for tap water consumption is Rp 374,727,334.

<p><em>The wastewater treatment plant (</em><em>WWTP</em><em>) at the </em><em>Universitas Pertamina</em><em> </em><em>area </em><em>is one of the campus's efforts to reduce the environmental impact of wastewater production. The processed WWTP can be processed into ready-to-drink water as an effort to reduce plastic waste. This plastic waste is usually produced by the consumption of mineral water products. The availability of ready-to-drink water in the campus complex is expected to increase the interest of campus residents to use tumblers and reduce the generation of plastic waste as well as university proactive efforts. The purpose of this study was to analyze the units needed to process WWTP effluent into ready-to-drink water by looking at various alternatives. This study uses the analytical hierarchy process (AHP) in determining the best alternative. The units required for each alternative are equalization tub, slow sand filter, and disinfection. Meanwhile, for processing, there are three alternatives, namely microfiltration (MF), ultrafiltration (UF), and combined microfiltration – ultra-filtration (MF-UF). The selection of these alternatives was adjusted to the criteria of cost, required membrane area, flux recovery after backwashing, and the effectiveness of total coliform removal. MF filtration technology is the largest weight, which is 0.381. Where the use of MF in the </em><em>Universitas Pertamina</em><em> </em><em>area</em><em> is cheaper and requires better area than UF and MF-UF technology.</em></p>

The building construction project is one of the activities that can pose a safety risk. Work safety risk assessment can be done using the Failure Mode and Effect Analysis (FMEA) method and looking at the Risk Priority Number (RPN) value. The purpose of this research is to take a case study of the building Office in determining the highest RPN and provide recommendations on its management. This project consists of 13 earthworks, passenger hoist, tower crane, scaffolding jobs, ironworks, formwork work, foundry work, mechanical, electrical plumbing (MEP) work, welding work, and floor wall doing works, and ceramic installation work. The highest RPN from the observations occurred in Iron Fabrication which can cause fingers hit by a bar cutter and bender. In this case, personal protective equipment (PPE) is significant in preventing these impacts from occurring in the project work area.

Excessive water consumption to meet water needs has changed aquatic water quality and quantity. Focus on domestic wastewater treatment via built wetlands. Disinfection protects humans against disease-causing viruses, bacteria, and protozoan parasites in wastewater. This study planned the disinfection of artificial wetland wastewater to fulfill microbiological criteria. From the examined data, each unit's design criteria and disinfection effectiveness for the created wetland outlet in the WWTP unit will be discussed. The created wetland must process 8696 cfu/100mL of fecal coliform. Despite good processing efficiency, 94% of fecal coliforms do not fulfill quality criteria. WWTP's wetland emits 8.011 mg/L of Ammonia. 90% chlorine costs Rp. 35,000/kg on the market. Total disinfection costs are rough Rp. 1,018,210.73. Water quality, lamp output power, and exposure distance affect lamp intensity. The lamp's electric power controls the beam's intensity; the more power, the more emission. The emitted power isn't equal to the lamp's electric power. According to the state electricity provider, families with a 900VA power limit will pay Rp. 1,352/kWh in July-September 2021. Nine 30-W bulbs irradiate bacteria. The lights will run for 24 hours non-stop. Hence the monthly electricity usage is 194.4 kWh or Rp 262.829.00.