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All Journal Jurnal Serambi Engineering
Richardus Indra Gunawan
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Environmental Science

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Pengaruh Koagulan PAC dan Tawas Terhadap Surfaktan dan Kecepatan Pengendapan Flok Dalam Proses Koagulasi Flokulasi Elvis Umbu Lolo; Yonathan Suryo Pambudi; Richardus Indra Gunawan; Widianto Widianto
Jurnal Serambi Engineering Vol 5, No 4 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i4.2315

Abstract

Surfactants are compounds that make up deterjents, which if deterjent is dumped into the river it will cause pollution. In the province of West Java, river water and receiving water bodies, based on the results of the study, showed moderate to severe pollution by wastewater containing deterjents. The results showed that the PAC coagulant and alum has a small effect on the decrease in surfactant and floc velocity settling, where the decrease in surfactant in the rainy season for PAC coagulant is 49.51% and alum coagulant 40.73%. While in the dry season the decrease in surfactant with PAC coagulant 41.06% and alum coagulant 31.10%. Then the floc velocity settling was measured to explain the correlation of surfactant decline, and the results obtained for the rainy season floc velocity settling with PAC coagulant was 0.80 cm / minute and alum was 0.27 cm / minute. Whereas in the dry season with the PAC coagulant the floc velocity settling was 0.91 cm / minute and the alum coagulant was 0.31 cm / minute. The results of quantitative regression analysis with the SPSS statistical test showed that the H0 hypothesis was accepted, that the coagulant had no effect on surfactant reduction and floc velocity settling.
Penilaian Dampak Lingkungan Industri Tahu Menggunakan Life Cycle Assessment (Studi Kasus: Pabrik Tahu Sari Murni Kampung Krajan, Surakarta) Elvis Umbu Lolo; Richardus Indra Gunawan; Agerippa Yanuranda Krismani; Yonathan Suryo Pambudi
Jurnal Serambi Engineering Vol 6, No 4 (2021): Oktober 2021
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v6i4.3480

Abstract

The problem faced by the tofu industry is waste management. So, it is necessary to do so that tofu waste does not pollute the environment by managing waste and emissions, efficient consumption of energy, materials, andwater. One way to identify environmental pollution is by Life Cycle Assessment. This study uses the Life Cycle Assessment (LCA) method. The LCA flow in this study is to determine goals and scopes, create inventory data, make grouping impacts and how much impact they generate, as well as interpreting to provide improvements. The functional unit in this study is 1 kg of tofu which is produced in 1 day. The results of this study were divided into five impact categories, namely, climate change, the most important being 2195 kg CO2, human toxicity potential at 2187 kg 1,4-Dikchloro benzene, eutrophication at 0.935 kg PO4, photo oxidant at 0.797 kg C2H4, and acidification at 15,915 kg. SO2. The recommended improvement alternative is to make efforts to use water efficiently during the tofu production process, including the need to clean the scale in the steam boiler to increase the volume of steam produced, so that the use of water and energy is more efficient.
Reduksi Kadar Phospat Limbah Cair Rumah Sakit Menggunakan Bakung Putih (Crinum asiaticum Linn.) (Studi Kasus: RSUD dr. Soehadi Prijonegoro Kabupaten Sragen) Bayu Kusuma Adi; Elvis Umbu Lolo; Richardus Indra Gunawan; Yonathan Suryo Pambudi
Jurnal Serambi Engineering Vol 6, No 2: April 2021
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v6i2.2887

Abstract

RSUD dr. Soehadi Prijonegoro Sragen produces liquid waste containing microorganisms, toxic and radioactive chemicals. The results of the laboratory examination showed that the liquid waste level always exceeded the quality standard, namely the parameter of phosphate. The phosphate level in September 2013 was 4.80 mg / L, while in December 2013 the concentration was 2.60 mg / L, so  additional  treatment is needed, one of which is phytoremediation using white daffodils (Crinum asiaticum Linn.). This research method is an experimental research design with  pre-post Test with Control Group Design where the wastewater will pass through a wet tank   containing white lily plants with a residence time of 24 hours/day and a treatment rate  of 1100 liters/day. Th research aimed to determine the effect of phytoremediation of white daffodils on the reduction of phosphate levels and the average percentage of its reduction. The results of this study in the ninth and tenth sample collection  met the quality standards of  1.99 mg / L and 1.89 mg / L. Phytoremediation of white daffodils (Crinum asiaticum linn.) may reduce phosphate levels by 45.59%.
Co-Authors Agerippa Yanuranda Krismani Bayu Kusuma Adi Elvis Umbu Lolo Elvis Umbu Lolo WIDIANTO WIDIANTO YONATHAN SURYO PAMBUDI