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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.    

One common household waste often encountered and rarely processed is used cooking oil. Used cooking oil is the residual oil from frying that has been repeatedly used. The common practice of reusing or improperly disposing of it by the community is considered hazardous as it has the potential to poison the body and pollute the environment. One effort to utilize used cooking oil is by recycling the waste into raw materials for making aromatherapy candles and essential oil scented soaps. This purpose activity is empower the community of Nglebak to utilize household waste and transform it into economic materials. This activity is carried out through research methods, material presentation, processing practice, and discussion. The research results on aromatherapy candles indicate that a formulation of used cooking oil and coconut wax at a ratio of 2:1 can produce ecofriendly aromatherapy candles with an ideal appearance and duration. The research results on soap indicate that stirring for 30 minutes with a volume of 60 mL of KOH (Potassium Hydroxide) is the ideal formulation for making essential oil scented soaps as it yields the most with a pH that complies with SNI No. 40-4058-1996