Closing the Loop: Goal Programming-Based Optimization in a Tofu-Centered Agro-Eco-Industrial Park

Ade Aisyah Arifna Putri; Ratna Purwaningsih; Faradhina Azzahra; Sri Hartini; Candra Irawan; Parwa Oryzanti

doi:10.12928/si.v23i2.396

Authors

Ade Aisyah Arifna Putri Industrial Engineering Department, Sebelas Maret University, Surakarta 57126, Indonesia
Ratna Purwaningsih Industrial Engineering Department, Diponegoro University, Semarang 50275, Indonesia
Faradhina Azzahra Industrial Engineering Department, Diponegoro University, Semarang 50275, Indonesia
Sri Hartini Industrial Engineering Department, Diponegoro University, Semarang 50275, Indonesia
Candra Irawan Industrial Engineering Department, Diponegoro University, Semarang 50275, Indonesia
Parwa Oryzanti Research Center for Ecology and Ethnobiology, National Research and Innovation Agency, Bogor 16911, Indonesia

DOI:

https://doi.org/10.12928/si.v23i2.396

Keywords:

Agro Eco Industrial Park, Goal programming, Optimization, Tofu industries, Waste recycling rate

Abstract

Developing an agro-eco-industrial park based on the tofu industry must consider the balance of each agro-industry's production capacity. This research aims to (1) develop an optimization model for material flow between industries and (2) explain the material flow and provide waste utilization recommendations for other industries to create a closed loop. The industries involved in this agro-eco-industrial park consist of the tofu industry, fertilizer producers, tempeh gembus producers, cattle farms, biodigesters, paddy farmers, soybean producers, and nata de soya producers. The model was created using a goal programming approach. Traditional tofu processing generally generates a variety of waste with high nutritional value, but it is detrimental to the environment if disposed of directly. The flow of materials among the related industries is based on the tofu industrial cluster, which consists of 30 industries in Grobogan, Central Java, Indonesia. The expected output comprises eight decision variables representing the production amount of industries. Data analysis reveals that the model outperforms the current conditions, with the waste recycling rate increasing from 14 % to 97 %. This model converts waste into valuable resources such as fertilizer and gas energy through biodigester processing and other economically viable methods.

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