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"Infrastruktur hijau merupakan teknologi untuk mengelola air hujan yang mampu mengendalikan limpasan. Penelitian ini bertujuan untuk menilai efektifitas dan efisiensi infrastruktur hijau dalam pengurangan volume dan debit puncak limpasan hujan pada tipikal daerah perkotaan. Lokasi penelitian ini adalah Kelurahan Baru, Kecamatan Pasar Rebo, Jakarta Timur yang berada di sub DAS Cijantung. Praktik infrastruktur hijau yang disimulasikan yaitu bioretensi, constructed wetlands dan vegetative swales. Pemodelan sebaran spasial penempatan infrastruktur hijau menggunakan GITBoLA menunjukkan potensi sebaran bioretensi sebesar 15,88%, constructed wetlands dan vegetative swales masing-masing seluas 4,42%. Hasil analisis SWMM menunjukkan bioretensi mampu mengendalikan debit puncak limpasan sebanyak 23,47% dengan kemampuan mengontrol volume limpasan 222 liter/m2 sedangkan constructed wetlands mereduksi debit puncak sebesar 5,91% dengan kemampuan mengontrol volume 197 liter/m2 dan vegetative swales mereduksi debit puncak sebesar 2,11% dengan mengontrol volume 70 liter/m2. Luas optimum dari kombinasi penggunaan bioretensi dan constructed wetlands sebesar 17,6%. Nilai present value dari biaya infrastruktur hijau sebesar Rp. 55,26 milyar, lebih rendah dibandingkan infrastruktur konvensional dengan saluran drainase dengan present value sebesar Rp. 57,39 milyar. Sehingga dari segi ekonomi, infrastruktur hijau efisien untuk diterapkan.......Green infrastructure is a technology for managing stormwater to control runoff. This study aims to assess the effectiveness and efficiency of green infrastructure in reducing the volume and peak runoff in typical urban areas. The study area is Baru Village, East Jakarta, which is in the Cijantung sub-watershed. The simulated green infrastructure practices are bioretention, constructed wetlands and vegetative swales. The green infrastructure siting modeling using GITBoLA shows a potential bioretention distribution of 15.88%, constructed wetland and vegetative swales of 4.42% respectively. The results of the SWMM analysis show bioretention control peak discharge as much as 23.47% with the ability to control runoff volume 222 liters/m2 while constructed wetland reduces peak discharge by 5.91% with the ability to control 197 liter/m2 volume and vegetative swales reduce peak discharge by 2.11% and controlling the volume of 70 liters/m2. The optimum area of the combination use of bioretention and constructed wetlands is 17.6%. Present value of green infrastructure costs Rp. 55.26 billion, lower than conventional infrastructure with drainage channels with a present value of Rp. 57.39 billion. From an economic perspective, green infrastructure is efficient to implement."

"ABSTRAKUntuk mengurangi penggunaan air bersih, IPA Karanggayam PDAM TirtamartaYogyakarta dapat menggunakan kembali air backwash sand filter. Karakteristikair backwash sand filter mengandung Fe sebesar 8,205 mg/L dan Mn sebesar2,682 mg/L. Manganese ore constructed wetland diajukan dalam penelitian iniuntuk penyisihan besi dan mangan. Penelitian menggunakan subsurfacehorizontal flow manganese ore constructed wetland dengan dimensi 120x60x40cm3, sistem batch, menggunakan tanaman Phragmites australis, dan variasi waktutinggal dari hari 1 - 5. Hasil yang diperoleh menunjukkan penyisihan kekeruhan,besi, mangan dan COD meningkat seiring bertambahnya waktu tinggal. Denganwaktu tinggal 1 hari, sistem ini menyisihkan kekeruhan, besi, mangan dan CODsebesar 70,97%; 91,95%; 83,16%; dan 55,22%. Kandungan besi pada tanamanPhragmites australis di akhir penelitian pada akar, daun dan batang yaitu 635,28mg/kg; 96,99 mg/kg dan 34,73 mg/kg. Kandungan mangan pada tanamanPhragmites australis di akhir penelitian pada daun, akar dan batang yaitu 26,30mg/kg; 22,87 mg/kg dan 6,15 mg/kg. Kandungan manganese ore murni terbesaradalah komponen pirolusit (MnO2) yaitu sebesar 90,68% kemudian setelahpenelitian berkurang menjadi 39,11%. Desain manganese ore constructed wetlandskala lapangan berukuran 26,4x11,7x1 m3 dengan debit 80 m3/hari. Setelahpengolahan dari manganese ore constructed wetland, air backwash sand filtertelah memenuhi standar baku mutu air bersih sehingga dapat dimanfaatkankembali.

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ABSTRACTTo reduce their fresh water consumption, IPA Karanggayam PDAM TirtamartaYogyakarta can reuse sand filter backwash water. The characteristic of sand filterbackwash water contains exceeded Fe 8,205 mg/L and Mn 2,682 mg/L.Manganese ore constructed wetland was proposed in this research for the removalof iron and manganese.This research used subsurface horizontal flow manganeseore constructed wetland with dimension is 120x60x40 cm3, batch system, usingPhragmites australis, and detention time from 1 day to 5 day. The result show thatthe removal of turbidity, iron, manganese and COD increased accordingly withthe increase of detention time. With the detention time at 1 day, the turbidity, iron,manganese, and COD removal were up to 70,97%; 91,95%; 83,16%; dan 55,22%in this system. In the end of the research, Phragmites australis root, leaves, andstem contains 635,28 mg/kg; 96,99 mg/kg and 34,73 mg/kg of iron. AlsoPhragmites australis leaves, root, and stem contains 26,30 mg/kg; 22,87 mg/kgand 6,15 mg/kg of manganese. The biggest component in manganese ore is MnO2(pyrolusit) up to 90,68% and decreased up to 39,11% in the end of the research.The design of manganese ore constructed wetland with dimension 26,4x11,7x1 m3and rate of flow 80 m3/hari. After the treatment of manganese ore constructedwetland, sand filter backwash water fulfilled the quality standard so can be reuse."

"This research was carried out to investigate the efficiencies of leachate treatment by usingsubsurface flow constructed wetland (CW) with low permeable reactive media and guinea grass(Panicum maximum TD 58). Pilot scale CW was examined at hydraulic loading rate (HLR) of0.028 m/d and hydraulic retention time (HRT) of 10 d. Two different types of media in CW wereused i.e. system 1: clay and sand mixture at ratio of 40:60 (%w/W) and system 2: clay, iron sludgeand sand mixture at ratio of 30: 10:60 (%w/w). The results showed that the performance of system 2was better in terms of pollutant removal efficiencies. Average BOD, COD and TKN removals were76.1, 68.5 and 73.5% respectively. Methane, carbon dioxide and nitrous oxide emissions during thetreatment of CW were 23.2-52.1, 69.1-601.8 and 0.04-0.99 mymzd respectively. The use of CWwith reactive media in system 2 and vegetation resulted in lower GHG emissions. The results showthat CW with low permeable reactive media could be effectively used to remediate leachate fromthe landfill site."