Judul: Rekayasa Teknologi Pemanenan Mikroalga melalui Perbedaan Densitas Flokulan pada Teknik Bio-flokulasi.
Abstrak: Harvesting method is one crucial process during microalgal cultivation for development of bioenergy, thus low-cost bio-flocculation technique needs continuous improvement for yielding higher biomass and faster harvesting period. The study was conducted by mixing Tetraselmis suecica (flocculant) with microalgal species of Chlorella sp. and Nannochloropsis sp. (non-flocculants) to determine the rate of deposition from several treatment (P1-P4). The results showed that Tetraselmis suecica was functional in accelerating harvest of Chlorella sp. and Nannochloropsis sp, with the highest precipitation observed at P4. The deposition rate of Chlorella sp. was increased from 52.12±1.91% to 70.44±0.22%, while Nannochloropsis sp. from 13.84±1.27% to 45.06±0.75% after Tetraselmis suecica was added. Rate of deposition during bio-flocculation process was proven efficient at indoor scale cultivation compare to outdoor. Lipid yielded from bio-flocculation technique was higher compare chemical flocculant, such as NaOH.
Keyword: bio-flocculation, Chlorella sp., harvesting, Nannochloropsis sp., Tetraselmis suecica

Judul: Pengembangan Bio-flokulasi sebagai Teknik Pemanenan Mikroalga Ramah Lingkungan
Abstrak: Microalgae harvesting is an important part in microalgae cultivating system. Microalgae harvesting technique system which commonly used are centrifugation, filtration and flocculation, but those techniques still have some disadvantages, such as not environmentally friendly, and high of energy used and costly. Bio-flocculation harvesting technique using the microalgae as a flocculant agent can be an alternative way to solve those problems. In this research, mixing of Tetraselmis suecica (flocculant) with Chlorella sp., and Nannochloropsis sp. (nonflocculant) in ratio of 1:4, 2:4, 3:4 and 4:4 (v/v) has conducted to obtain % recovery. The results show that Tetraselmis suecica species as a flocculant agent can fasten the harvesting of Chlorella sp. and Nannochloropsis sp. It can be proved with the increase of % recovery value of Chlorella sp. from 51.14±1.07% to 67.34±0.67% and Nannochloropis sp. from 20.52±1.17% to 42.43±0.40% at the first hour. The result shows that bioflocculation can be applied as microalgae harvesting technique.Microalgae harvesting is an important part in microalgae cultivating system. Microalgae harvesting technique system which commonly used are centrifugation, filtration and flocculation, but those techniques still have some disadvantages, such as not environmentally friendly, and high of energy used and costly. Bio-flocculation harvesting technique using the microalgae as a flocculant agent can be an alternative way to solve those problems. In this research, mixing of Tetraselmis suecica (flocculant) with Chlorella sp., and Nannochloropsis sp. (nonflocculant) in ratio of 1:4, 2:4, 3:4 and 4:4 (v/v) has conducted to obtain % recovery. The results show that Tetraselmis suecica species as a flocculant agent can fasten the harvesting of Chlorella sp. and Nannochloropsis sp. It can be proved with the increase of % recovery value of Chlorella sp. from 51.14±1.07% to 67.34±0.67% and Nannochloropis sp. from 20.52±1.17% to 42.43±0.40% at the first hour. The result shows that bioflocculation can be applied as microalgae harvesting technique.
Keyword: Harvesting Mikroalgae, Bio-flocculation, Recovery, Tetraselmis suecica, Chlorella sp., Nannochloropsis sp

Judul: Perancangan jalur interpretasi wisata sejarah kawasan kota tua Jakarta
Abstrak: Tapak perancangan berupa jalur interpretasi yang terletak di dalam wilayah administrasi kota Jakarta Barat dan melalui Jl. Stasiun, Jl. Pintu Besar Selatan dan Utara, Jl. Kali Besar timur dan barat, Jl. Cengkeh, Jl. Pos, dan Jl. Lada. Aksesibilitas menuju tapak mudah dengan berbagai alternatif sarana transportasi. Tata guna lahan kawasan 78% terdiri dari perkantoran perdagangan.
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