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Perkembangan ilmu pengetahuan dan teknologi yang pesat di Indonesia telah mendorong pertumbuhan industri secara signifikan. Meskipun memberikan dampak positif terhadap peningkatan perekonomian masyarakat, pertumbuhan industri juga menimbulkan dampak negatif apabila tidak diiringi dengan pengelolaan lingkungan yang baik, seperti pencemaran dan kerusakan lingkungan hidup. Salah satu solusi yang dapat diterapkan dalam mengurangi dampak tersebut adalah pengelolaan limbah cair melalui sistem Instalasi Pengolahan Air Limbah (IPAL). PT. X, sebagai perusahaan BUMN, turut berkontribusi dalam pengelolaan lingkungan melalui penerapan IPAL. Fokus IPAL di PT. X meliputi perencanaan dan rekayasa instalasi, audit dan inspeksi sistem air, serta monitoring dan pengujian kualitas limbah, khususnya limbah domestik. Limbah domestik, yang berasal dari aktivitas rumah tangga seperti air bekas mandi, mencuci, dan dapur, diolah melalui metode IPAL agar dapat dimanfaatkan kembali untuk keperluan non-konsumsi, seperti penyiraman tanaman dan irigasi. Pengolahan ini menjadi langkah strategis dalam mendukung pembangunan industri yang ramah lingkungan dan berkelanjutan.

Perkembangan ilmu pengetahuan dan teknologi yang pesat di Indonesia telah mendorong pertumbuhan industri secara signifikan. Meskipun memberikan dampak positif terhadap peningkatan perekonomian masyarakat, pertumbuhan industri juga menimbulkan dampak negatif apabila tidak diiringi dengan pengelolaan lingkungan yang baik, seperti pencemaran dan kerusakan lingkungan hidup. Salah satu solusi yang dapat diterapkan dalam mengurangi dampak tersebut adalah pengelolaan limbah cair melalui sistem Instalasi Pengolahan Air Limbah (IPAL). PT. X, sebagai perusahaan BUMN, turut berkontribusi dalam pengelolaan lingkungan melalui penerapan IPAL. Fokus IPAL di PT. X meliputi perencanaan dan rekayasa instalasi, audit dan inspeksi sistem air, serta monitoring dan pengujian kualitas limbah, khususnya limbah domestik. Limbah domestik, yang berasal dari aktivitas rumah tangga seperti air bekas mandi, mencuci, dan dapur, diolah melalui metode IPAL agar dapat dimanfaatkan kembali untuk keperluan non-konsumsi, seperti penyiraman tanaman dan irigasi. Pengolahan ini menjadi langkah strategis dalam mendukung pembangunan industri yang ramah lingkungan dan berkelanjutan.

This study aims to analyze the quality of domestic wastewater based on three main parameters: pH, ammonia, and Chemical Oxygen Demand (COD). The wastewater samples were collected from an industrial area, chosen for its role as a primary source of domestic waste that can impact environmental quality. The pH was tested using potentiometry, while ammonia and COD concentrations were measured using UV-Vis spectrophotometry, a precise method for analyzing these substances. The results showed that the pH values of the wastewater ranged from 6.68 to 10.28. This variation in pH reflects the acidity or alkalinity of the wastewater, with some samples being neutral to slightly alkaline. The ammonia levels detected ranged from 0.0654 to 0.3849 mg/L. While these levels are within the limits set by regulations, they indicate a significant presence of ammonia in the wastewater, which requires continued monitoring. However, the most striking finding was the COD levels, which ranged from 21.60 to 245.71 mg/L, with some samples showing very high values. High COD levels indicate a large presence of organic matter, which can lead to a decline in water quality. Some samples with COD values exceeding the threshold of domestic wastewater quality standards, as stated in Ministerial Regulation No. 68 of 2016, require additional treatment to reduce organic contamination. Overall, while the pH and ammonia values remain within safe limits, the high COD levels in some samples indicate that further treatment is necessary to reduce organic pollution. This study emphasizes the importance of routine monitoring of domestic wastewater to protect environmental quality and prevent broader negative impacts on aquatic ecosystems and human health.  

PT X is a chemical manufacturing company specializing in the production of phosphoric acid and sulfuric acid. In addition to waste generated from production processes, PT X also produces domestic wastewater originating from supporting activities such as employee barracks, offices, and laundry facilities. This domestic wastewater contains parameters that can potentially pollute the environment, such as BOD, COD, TSS, ammonia, and Total Coliform, some of which exceed the quality standards set by the Minister of Environment Regulation No. 68 of 2016. This study aims to design an effective Domestic Wastewater Treatment Plant (DWTP) system to process the domestic wastewater of PT X. The proposed DWTP system consists of a collection tank, Anaerobic Baffled Reactor (ABR), Aerobic Biofilter, and disinfection unit. Each unit is designed to reduce pollutant parameters to meet quality standards. Based on the calculations, this system can handle a wastewater flow rate of 21.91 m³/day with high treatment efficiency for critical parameters. The study results indicate that the proposed DWTP design can reduce environmental pollution, improve wastewater treatment operational efficiency, and comply with applicable regulations. Implementing this system is highly recommended to ensure environmental sustainability and the continued operations of PT X.

Industry 4.0 has brought significant changes to human life across various sectors, including education. The education sector serves as a fundamental pillar for the growth and development of future generations, requiring collaboration from all stakeholders. Effective regulations and measures are essential to improve the quality of education and teaching.One activity within the education sector generates domestic wastewater that must be treated. Domestic wastewater refers to water waste from household activities, such as washing, kitchen use, and toilets. This study employs a quantitative method using secondary data on wastewater flow rates and parameters. The research stages include preparation, data collection (both primary and secondary), data analysis, and the preparation of environmental documents.Domestic wastewater is categorized into grey water and black water. The treatment of wastewater using anaerobic and aerobic biofilters has proven effective in reducing organic pollutant levels. The treated wastewater will be repurposed for irrigating Green Zone in school buildings.

Butuh Village is one of the villages in Butuh District,  Purworejo Regency, Central Jawa Province. The villages’s need for awareness of adequate sanitation is still quite low. This can be proven by the fact that there are still many houses that do not have adequate domestik waste processing infrastructure. AS we know, if we dispose of domestik waste in the form of grey water and black water directly into the environment without a good waste processing system, it will pollute the environmen. The aim of this design is to determine the domestik wastewater treatment bulding in Butuh village using the hierarchical method.The final calculation using the hierarchical method resulted in thr selected domestic wastewater treatment being the Anaerbic Buffled Reactor (ABR) using 4 parameters in the form of maintenance operatinal cost, land area used, construction costs and removal efficiency. The Anaerobic Buffled Reactor (ABR) is planned to have 5 compartments with a BOD removal efficiency of 84%, construction cost of Rp. 67.899.607, the land area required is 45 m2, and operational costs are Rp. 2.605.281 and maintenance is relatively easy.    

In the wastewater industry, it is divided into 2, specifically wastewater from home activities and production. Domestic activity wastewater comes from all worker sanitation activities and industrial supporting facilities such as prayer rooms, canteens and toilets. Waste water from these activities must be treated first so that it does not pollute the surrounding environment. PT X is an industry that operates in the field of bulk LPG filling stations which has made efforts to process and also utilize 100% of the waste water from its domestic activities. Sewage Treatment Plants handle the processing (STP) facilities with chemical and biological processes which are able to reduce pollutant parameters such as BOD, COD, TSS, Ammonia and Total Coliform by 90%, 85%, 95%, 90% and 99.9% and have been meet the specified quality standards. Meanwhile, oil & fat parameters are not too focused because they still meet existing quality standards, Therefore, processing aims to lower the relatively high organic characteristics. The results of this processing will be reused to reduce the use of clean water for irrigating green open spaces and roads.

The fabric printing industry makes a major contribution to various kinds of textile products, its by-products, liquid waste, require special attention in environmental management. Most of the liquid waste originating from the fabric printing industry consists of dyes, solvents and other processing chemicals. To prevent negative effects on water quality and the surrounding environment, managing this waste is very important. To achieve sustainability, advances in liquid waste processing technology are very important. The solution to reduce the impact of liquid waste from the fabric printing industry is an advanced purification process. PT. X to reduce polutan parameter such BOD, COD , TSS, Ammonia and Total Colidform by. 90%, 95%, 95%, 85%, 20%, 90% And meets the specified quality standards. Because the pH parameters still meet existing quality standards, processing is focused on reducing the organic parameters which are quite high. The results of the process will be used again for flushing activities in green open spaces and for washing operational vehicles.