An Environmental Engineering student Batch 2018 named Sekar Arum, Nurpita Sinurat, and Batch 2017 named Putri Laila Anggraina. In 2021, she submitted her thesis journal to “The Fourth International Conference on Sustainable Infrastructure and Built Environment (SIBE) 2022” organized by the Bandung Institute of Technology (ITB). The program consists of many stages and their journal passed the SIBE proceedings and Sekar Arum got the opportunity to become a presenter at the conference on March 9, 2022, as well as continue the selection of publications in international journals. And after going through quite a series of stages and the journal “The Study of Water Lettuce (Pistia sstratiotes L.) Application in Reducing COD Levels of Tofu Wastewater Using Batch System Phytoremediation” by Nurpita Sinurat succeed in The Fourth International Conference on Sustainable Infrastructure and Built Environment (SIBE) 2022, on August 17, 2022, the journal a “Study of Lerak (Sapindus Rarak) Biochar Application for Andosol Agricultural Soil Remediation” by Sekar Arum and “The Eco Enzyme Application to Reduce Nitrite in Wastewater as the Sustainability Alternative Solution in Garbage and Wastewater Problems” by Putri Laila Anggraina officially published in IOP Conference Series: Earth and Environmental Science (IOP EES), IOP EES terin-deks Scopus and Scimago Journal Rank. None of this would have been possible without the help and guidance of Ir. Temmy Wikaningrum, M.Si.