PENGOLAHAN LIMBAH CAIR DOMESTIK MENGGUNAKAN TANAMAN LIDAH MERTUA (SANSEVIERIA) DENGAN SISTEM HIDROPONIK DEEP FLOW TECHNIQUE

Abstract

Domestic liquid waste (grey water) is liquid waste produced from kitchen, bathroom and clothes
washing activities. Wastewater that does not meet quality standards can pollute the environment, so it needs to be treated before being discharged into water bodies. The processing of domestic liquid waste (grey water) is carried out using the phytoremediation method of the snake plant (Sansevieria) using the Deep Flow Technique (DFT) hydroponic system. This method relies on plants to reduce or degrade water-soluble pollutants through the roots. This research aims to analyze the effectiveness of the snake plant (Sansevieria) in reducing BOD and COD values using the DFT hydroponic system. This processing is carried out in stages with the initial stage, namely acclimatization using clean water for 7 days, followed by the RFT (Range Finding Test) stage with variations in waste water concentration of 20%, 40%, 60%, 80% and 100% for 8 days. Next, sample analysis was carried out. Samples are taken for analysis according to the specified detention time, namely 24 hours, 48 hours and 72 hours. The results of the research show that processing domestic wastewater using mother-in-law's tongue (Sansevieria) with a DFT hydroponic system is able to reduce BOD and COD values. Optimum efficiency results were obtained on day 3 with a BOD reduction efficiency percentage of 77% from an initial concentration of 116.4 mg/L to 27 mg/L and a CODconcentration of 71% from an initial concentration of 309.6 mg/L to 90 mg/L.