ANALISIS PENGARUH ULTRAFINE BUBBLE TERHADAP REDUKSI POLUTAN PADA AIR LIMPASAN GREEN ROOF

Abstract

Penurunan ruang terbuka hijau mendorong penggunaan green roof sebagai solusi konservasi air berbasis bangunan. Namun, limpasan air dari green roof sering tercemar akibat media tanam dan belum layak digunakan kembali. Penelitian ini mengkaji pengaruh ultrafine bubble generator terhadap peningkatan kualitas air limpasan green roof dengan variasi aerasi 30, 45, dan 60 menit. Empat model diuji: tanpa vegetasi, kacang hias, krokot mawar, dan kangkung darat. Penilaian mutu air menggunakan metode STORET dan mengacu pada Permenkes No. 2 Tahun 2023 serta PP No. 22 Tahun 2021. Hasil menunjukkan perbaikan signifikan pada parameter COD, TDS, nitrit, amonia, DO, dan pH. Status mutu meningkat dari cemar berat (STORET -46) menjadi cemar ringan (STORET -5) setelah 60 menit aerasi. Durasi 45 menit cukup untuk sebagian besar tanaman, kecuali krokot mawar yang memerlukan 60 menit. Temuan ini menunjukkan potensi ultrafine bubble sebagai metode prapengolahan air limpasan green roof.

The decline in green open spaces has driven the adoption of green roofs as a building-based water conservation solution. However, runoff from green roofs is often polluted by planting media, making it unsuitable for reuse. This study examines the effect of an ultrafine bubble generator on improving the quality of green roof runoff, with aeration durations of 30, 45, and 60 minutes. Four models were tested: without vegetation, and with ornamental peanut, moss rose, and water spinach. Water quality was assessed using the STORET method, referring to Indonesian standards (Permenkes No. 2/2023 and PP No. 22/2021). Results show significant improvements in COD, TDS, nitrite, ammonia, DO, and pH levels. Water quality status improved from heavily polluted (STORET -46) to lightly polluted (STORET -5) after 60 minutes. A 45-minute aeration was sufficient for most plants, except moss rose, which required 60 minutes. The study highlights the potential of ultrafine bubble technology as a pre-treatment for green roof runoff.