Abstrak: Mayoritas penduduk Indonesia yang menempati wilayah bantaran sungai masih membuang air limbah domestiknya langsung ke sungai sehingga kualitas air sungai menurun drastis. Padahal air sungai merupakan salah satu sumber air utama yang dimanfaatkan sebagai air baku untuk air minum, misalnya air sungai Cikapundung di Kampung Tanggulan, Dago Pojok, Bandung. Masyarakat di bagian timur sungai ini membuang air limbah domestiknya ke sungai tersebut, sementara masyarakat di bagian barat sungai menggunakan air sungai tersebut sebagai sumber air utama untuk kebutuhan sehari-hari seperti mandi, mencuci pakaian, peralatan dapur, bahkan bahan makanan. Hal inilah yang membuat sungai di Kampung Tanggulan, Dago Pojok, Bandung ini menjadi perhatian utama dalam kebutuhan teknologi pengolahan air yang efektif dan tepat guna. Ketepatgunaan teknologi ini juga harus meliputi partisipasi masyarakat. Oleh karena itu tujuan dari penelitian ini adalah mengetahui efisiensi pengolahan floating tretment wetlands dengan 3 variasi tumbuhan dan potensi aplikasinya sebagai teknologi pengolahan air yang tepat guna di Kampung Tanggulan, Dago Pojok, Bandung. Penelitian mengenai efisiensi pengolahan dari floating treatment wetlands (FTWs) yang memiliki 3 tipe tumbuhan, Ipomoea reptans, Amaranthus tricolor, dan Lactuca sativa, dilakukan dalam skala laboratorium dalam kondisi batch. Wawancara dan kuesioner dilakukan terhadap 34 orang dari 137 KK dengan tingkat kesalahan 0,16 untuk mengetahui tingkat partisipasi masyarakat di Kampung Tanggulan, Dago Pojok, Bandung, Indonesia. Hasil efisiensi penyisihan rata-rata yang didapat mencapai lebih dari 45 % total suspended solids (TSS), 63 % chemical oxygen demand (COD), 84 % biological oxygen demand (BOD 5 ), 73 % Ammonium (NH 4 + -N) dan 86 % ortofosfat (PO 4 3-). Berdasarkan pengamatan didapat bahwa vegetasi dengan pengolahan terbaik adalah I reptans. Berdasarkan hasil wawancara dan kuesioner, teknologi FTWs ini berpotensi untuk menjadi teknologi tepat guna dengan partisipasi masyarakat yang mungkin diaplikasikan untuk restorasi sungai Cikapundung. Abstract: Most of Indonesian people that live beside the river or around the river are discard their domestic wastewater directly to the river so the water quality in the river has decreased significantly. Despite, this case is happening in Cikapundung River, precisely at Kampung Tanggulan, Dago Pojok, Bandung, Indonesia. This case indicates that appropriate wastewater treatment technology is needed in this area. Objective of this research is to investigate if floating treatment wetlands was an appropriate technology for solving the problem in Kampung Tanggulan, Dago Pojok, Bandung, Indonesia. The treatment efficiencies of floating treatment wetlands (FTWs) containing three types of macrophytes, Ipomoea reptans, Amaranthus tricolor, and Lactuca sativa, were investigated in a laboratory scale study in batch experiments. There are also interview and questionnaire for 34 people from 137 families in Kampung Tanggulan to determined acceptance of the community f...

Anthropogenic activities in the coastal waters of Bengkalis Island, Riau Province are thought to have increased due to human activities (settlements, ports, agriculture, households and industry). This caused an increase in organic matter in water and sediment in coastal waters. The content of organic matter in water and sediment can be used as an indicator of the quality of coastal waters. The research aimed to analyze the content of organic matter in water and sediment in the coastal waters of Bengkalis Island. The used purposive sampling. The research was carried out in April – July 2021, consisting of 4 research stations and each station consisted of 3 sampling points. Sampling was carried out in the intertidal zone in the north and south of Bengkalis Island, namely station I (Air Putih Village), Station II (Jangkang Village), station III (Selat Baru Village) and station IV (Liong Estuary). The results of the analysis of organic matter content in seawater ranged from 32.39-34.89 mg/l, the highest was at station I and the lowest was at station II. The results of the analysis of organic matter content in sediment of Bengkalis Island ranged from 0.01-0.31%, the highest was at station I and the lowest was at station II. A simple linear regression test showed that the relationship between the organic matter content of seawater and sediments in the coastal waters of Bengkalis Island was classified as a strong relationship with a correlation coefficient (r) 0.720 and a coefficient of determination (R2) 0.518. The results also show that the coastal waters of Bengkalis Island have a type of sediment fraction which is dominated by sandy mud.