Integrated Vertical Photobioreactor System for Carbon Dioxide Removal Using Phototrophic Microalgae

A vertical photobioreactor containing the microalgae Scenedesmus obliquus is a highly efficient system for converting carbon dioxide (CO2) into biomass. The use of photobioreactor for CO2 mitigation has been explored using microalgae as photosynthetic microorganism. The growth rate (m, h-1) were 0.03; 0.13; 0.20; 0.09 at treatment of 0%, 2%, 5% and 7% pure CO2 supplied, respectively during 16 days experiment. The maximum dried biomass (gr ml-1) was 1.7 at 2% pure CO2. The highest CO2 removal effiency (%) was 34 at 2% pure CO2 supply. The results showed that the photobioreactor gave a high efficiency of CO2 removal by phototrophic microalgae culture

Canteen Wastewater and Gray Water Treatment Using Subsurface Constructed Wetland-Multilayer Filtration Vertical Flow Type with Melati Air (Echindorus Paleafolius)

Domestic wastewater needs to be treated because it can pollute the environment, either water bodies, ground water, or soil. One alternative to treat domestic wastewater is using subsurface constructed wetland methods. This method has advantages, among others, cheap, simple technology and can be applied to the area of ample land. In this research, subsurface contructed wetlands-multilayer filtration with vertical flow type using Melati Air (Echindorus paleafolius) in field scale to treat domestic wastewater from canteens and gray water toilet of Senior High School at Bekasi with treatment capacity for 2261 L/day. Subsurface constructed wetlands-multilayer filtration with vertical flow type is an advanced treatment in this research. For preliminary treatment the collecting and aeration tank is used. Performance of subsurface constructed wetland-multilayer filtration with vertical flow type was able to achieve effluent COD parameters of 40 mg / L (standard 100 mg/L) from an average influent of 350 mg/L with removal efficiency of 90%, while BOD was successfully degraded to 33.00 mg/L (quality standard 30 mg/L) of an average influent concentration of 350 mg/L. In addition, the parameters analyzed are total nitrogen, the total phosphate succeeded to meet the quality standard. Based on the results of laboratory analysis, the reactor is able to treat organic loading of 500-700 kg BOD5/Ha/Day compared to previous research which is range from 40-300 kg BOD/Ha/ Day. Similarly, the value of K in this study ranged from 0.35-0.57 m/day for BOD and 0.37-0.45 m/day for COD compared to precious research which is 0.055-0.16 m / day for BOD and 0.027-0.16 m / day for COD

Removal of Total Petroleum Hydrocarbon (TPH) crude oil by consortium bacteria acetobacter tropicalis and lactobacillus casei

The objective of this research is to remove Total Petroleum Hydrocarbon (TPH) contained in crude oil by utilizing Acetobacter tropicalis and Lactobacillus casei bacteria consortium through degradation process. Crude oil degradation was conducted on Stone Mineral Salt Solution (SMSS) liquid media and artificial sea water in a controlled environment with limited system. The implemented variations on SMSS liquid media are differentiated based on acidity (pH) of 3, 5, and 7, with contact time of 7, 14, and 21 days. On the other hand, the variation implemented on artificial sea water only applied on contact time of 7, 14, and 21 days. Samples were incubated on a shaker incubator with 30°C and 150 rpm. The sensitivity test revealed that consortiom bacteria are resistant against crude oil, which proven by the missing inhibiting zone formation around disc paper that contains crude oil. This research shows that the optimum condition to degreade TPH both on SMSS liquid media and artificial sea water is at pH level of 7 in 7 days with TPH removal efficiency of 94%. This research provides an important information that Acetobacter tropicalis and Lactobacillus casei bacteria consortium has the potential to degrade crude oil TPH in a controlled environment

Penyuluhan dan Pelatihan Pemanfaatan Minyak Jelantah Menjadi Lilin dan Sabun di Kelurahan Cisalak, Depok, Jawa Barat

Konsumsi minyak goreng di Indonesia terus mengalami peningkatan dari tahun ke tahun sehingga menyebabkan limbah minyak jelantah juga semakin meningkat. Minyak jelantah merupakan limbah minyak goreng yang telah digunakan berulang kali dengan kandungan senyawa bersifat karsinogenik dan persisten. Kedua sifat tersebut berbahaya bagi kesehatan dan lingkungan jika minyak jelantah dikonsumsi dan dibuang ke lingkungan tanpa adanya pengolahan. Kegiatan ini bertujuan untuk meningkatkan pemahaman dan kesadaran warga Kelurahan Cisalak, Depok, Jawa Barat khususnya Ibu PKK dan Karang Taruna akan dampak negatif dari minyak jelantah bagi kesahatan dan lingkungan. Metode pelaksanaan kegiatan ini dilakukan dengan memberikan penyuluhan mengenai dampak negatif minyak jelantah dan memberikan pelatihan pemanfaatan limbah minyak jelantah menjadi produk yang memiliki nilai ekonomis.. Melalui kegiatan ini, sebanyak 30 peserta dapat memahami dampak negatif dari minyak jelantah. Peserta juga mendapatkan keterampilan dalam memanfaatkan minyak jelantah sebagai bahan dasar pembuatan produk ekonomis seperti lilin dan sabun

Removal of Total Petroleum Hydrocarbon (TPH) crude oil by consortium bacteria acetobacter tropicalis and lactobacillus casei

The objective of this research is to remove Total Petroleum Hydrocarbon (TPH) contained in crude oil by utilizing Acetobacter tropicalis and Lactobacillus casei bacteria consortium through degradation process. Crude oil degradation was conducted on Stone Mineral Salt Solution (SMSS) liquid media and artificial sea water in a controlled environment with limited system. The implemented variations on SMSS liquid media are differentiated based on acidity (pH) of 3, 5, and 7, with contact time of 7, 14, and 21 days. On the other hand, the variation implemented on artificial sea water only applied on contact time of 7, 14, and 21 days. Samples were incubated on a shaker incubator with 30°C and 150 rpm. The sensitivity test revealed that consortiom bacteria are resistant against crude oil, which proven by the missing inhibiting zone formation around disc paper that contains crude oil. This research shows that the optimum condition to degreade TPH both on SMSS liquid media and artificial sea water is at pH level of 7 in 7 days with TPH removal efficiency of 94%. This research provides an important information that Acetobacter tropicalis and Lactobacillus casei bacteria consortium has the potential to degrade crude oil TPH in a controlled environment