Tofu contains various substances that are very good when consumed to improve people’s nutrition. In addition, tofu also has good taste. The problem is that the tofu production process produces products and non-product outputs in the form of waste that is very dangerous if directly disposed of in the environment. The BOD5 content of tofu small and medium-sized enterprises (SMEs) in Sugihmanik Village ranged from 3,667-4,933 mg/L and COD 7,668-9,736 mg/L. At the same time, the TSS values ranged from 701-1,189 mg/L. The BOD5 value in the river water content is 367 mg/L. It greatly exceeds the set Threshold Value. This study aims to measure the environmental impact using Life Cycle Assessment (LCA). LCA can identify the impact of each activity based on the impact category to identify the processes that contribute significantly to damaging the environment. This study found that the cooking and frying process had the highest impact, where the climate change category was the largest. Wastewater treatment plants, biogas from the biodigester as a substitute for electricity for water pumps, rice husks, and corn cobs are expected to reduce environmental impacts. The first section in your paper

Most traditional food industries in Indonesia are not complying with the expected environmental standard due to a lack of knowledge and environmental behaviour. Environmental damage in Sugihmanik, Purwodadi Regency, is one of the examples of the side effect of tofu industrial activities. At least 98,120 l of wastewater is disposed directly into the river daily. This manuscript presents the current situation of traditional tofu industries in Sugihmanik Village and analyses the most appropriate treatment design for tofu industrial wastewater. The descriptive method was used to identify the current practice to protect the environment. A hierarchical analytical process (AHP) was used to choose which wastewater treatment is suitable to be implemented there. This research also presents a practical method to identify the current flow of wastewater. The result shows that the wastewater produced by each tofu industry is 29.7 m3/ton of soybean used in the process, which less than the recent literature. AHP result also shows that up-flow anaerobic sludge bioreactor (UASB) has become the most appropriate wastewater treatment for the tofu industries.