Phytoremediation of methylene blue using duckweed (Lemna minor)

Macrophytes as wastewater treatment agents: Nutrient uptake and potential of produced biomass utilization toward circular economy initiatives.

A hybrid reed bed constructed wetland (HRBCW) with aeration system was employed in three-stages; a Surface-Flow (SF) system, a Vertical-Flow (VF) system, and lastly a Horizontal-Flow (HF) system in series. The system was planted with Malaysian native aquatic plant (Scirpus grossus) and it was made up of media arranged in three layers of medium gravel ( ϕ 10–15 mm) at the top, river sand ( ϕ 3–5 mm) in the middle, and larger gravel ( ϕ 30–35 mm) in the bottom of the CW. S. grossus could survive and reproduce with a continuous feed of 86.5 L raw wastewater per day. The results indicate that the system with a 3-day HRT achieved an average removal of 84.7 and 71.0% for NH4-N and PO4-P respectively. Based on this study, the use of HRBCW system for treating household sewage in small communities is a technically and economically feasible using S. grossus that has high effectiveness for treating domestic wastewater.

Performance of pilot Hybrid Reed Bed constructed wetland with aeration system on nutrient removal for domestic wastewater treatment

Dual function of Lemna minor and Azolla pinnata as phytoremediator for Palm Oil Mill Effluent and as feedstock.

Pharmaceutical compounds in wastewater are currently becoming emerging concern as the utilization of drugs in anthropogenic activities. This research analyzed the effectiveness of pilot-scale vertical subsurface flow constructed wetland (VSSFCW) planted with Scirpus grossus using an aeration system for simultaneous removal of ibuprofen, chemical oxygen demand (COD) and nutrients (NH3-N, NO3-N, and PO4-P) from domestic wastewater. The constructed wetland (CW) platforms (500 L capacity) filled with gravel and sand and planted with native species of S. grossus were used to treat pharmaceutical content in domestic wastewater continuously for 21 days. Three experiments were performed with hydraulic retention time (HRT) of 3, 4 and 5 days. Aeration rates of 0, 1, and 2 L/min were employed for each HRT. The combined effect of HRT, exposure period, and aeration to simultaneously remove ibuprofen, organic materials, and nutrients were examined statistically using Two-way ANOVA and Tukey HSD test. Filtration and adsorption mechanisms of ibuprofen compound by sand medium matrix were proven to occur using solid phase extraction method. The removal efficiency of ibuprofen and COD were dependent on the applied aeration and HRT (p

Simultaneous removal of ibuprofen, organic material, and nutrients from domestic wastewater through a pilot-scale vertical sub-surface flow constructed wetland with aeration system

Batik is one of ethnical cultures of Indonesia. The batik production has spread throughout Indonesia. One of the batik industry areas is located in Jetis, Sidoarjo, Indonesia. This industry has been operating for approximately 350 years without processing its wastewater. The batik wastewater contains several toxic compounds such as high BOD, COD and color pigment. These compounds can be harmful for the environment if discharged directly to water bodies. Phyto-treatment might be a solution to overcome this problem. The use of Scirpus grossus and Iris pseudacorus with variations of waste irrigation system using the intermittent method showed a COD removal up to 89% and BOD removal up to 97%. Mixed culture of S. grossus and I. pseudacorus showed a better removal than its single culture. The highest removal of BOD and COD was obtained in reactor with mixed culture plants under Flood/ Drain ratio of 2:1.

http://www.jeeng.net/pdf-105357-36853?filename=Study of BOD and COD.pdf

Study of BOD and COD Removal in Batik Wastewater using Scirpus grossus and Iris pseudacorus with Intermittent Exposure System

Mostly, batik industrial wastewater is produced from batik coloring process. One of this batik industry is located in Jetis, Sidoarjo since 1675. The wastewater produced from the coloring process in this location is directly dumped to Jetis river or drainage system around the area. One of the effective, efficient, and not costly wastewater treatment is by using phytotreatment process. Plants used in this research are Scirpus grossus and Iris pseudacorus. Both of this plants can grow in polluted environment and suitable to be used in wastewater treatment process. Moreover, both of these plants are semi aquatic plant that can grow in both wet and dry condition. Intermittent exposure system can be applied to increase the efficiency of the phytotreatment process for batik industry wastewater. This system connects plant and wastewater periodically through flood and drain cycle (F/D). This exposure can increase redox condition, so it can increase removal efficiency. The study variables used in this research are species variation of plants Scirpus grossus and Iris pseudacorus (single plant or combined plant) and intermittent exposure system variation, which is F/D 2:1 and F/D 1:2. The Primary parameter of this research is the concentration reduction of BOD, COD, and color. The secondary parameter such as plant morphology, wet weight, and dry weight, pH, and temperature. Preliminary research that has been done for this research is plant acclimatization and range finding test to determine the wastewater concentration. Phytotreatment test is conducted for 18 days in intermittent phase. The result shows that the best variable to remove pollutant is combined plant reactor with intermittent exposure of F/D 2:1 is able to remove 89% of COD and 97% of BOD.

/pdf/uji-penurunan-kandungan-cod-bod-pada-limbah-cair-pewarnaan-40ke74p8ym.pdf

Uji Penurunan Kandungan COD, BOD pada Limbah Cair Pewarnaan Batik Menggunakan Scirpus Grossus dan Iris Pseudacorus dengan Sistem Pemaparan Intermittent

Background: An earthquake is a natural calamity that cannot be avoided, occurs unexpectedly, and cannot be correctly estimated at its epicenter. Earthquakes can be predicted in the range of times that allow them to occur, but not their exact moment of occurrence or strength. Counseling is carried out to prepare the community to be able to deal with earthquake disasters when they occur. Purpose: To improve community preparation in the event of an earthquake disaster. Methods: Community service activities include employing leaflet media to provide earthquake catastrophe advice. People residing in earthquake-prone areas, such as Malabero Village and Bengkulu City, were targeted for the exercise. Results: Before and after receiving earthquake disaster preparedness counseling, there is an improvement in community understanding. Conclusion: By delivering health education using leaflets as a medium for health promotion, the public's understanding of readiness in coping with seismic disasters can be increased.

Penyuluhan tentang Gempa Bumi dengan Media Leaflet pada Masyarakat di Kelurahan Malabero Kota Bengkulu

Smoking behavior is considered very detrimental and has shifted to pleasant behavior, especially among schools, one of which is at the high school level. This makes students smoke in schools more. This study aims to study the relationship between knowledge and attitudes toward smoking behavior among SMAN 3 Pagar Alam students. This type of research uses a cross-sectional design to determine the sample size. The determination of the sample size using Proportional Random Sampling is as many as 64, as the sample of this study, data collection techniques using primary and secondary data, and data analysis methods using Univariate and Bivariate analysis with the Chi-Square test to determine the closeness of the relationship seen from the value of the Contingency Coefficient (C). The results showed that out of 64 students, 46.9% had less knowledge, 15.6% had sufficient knowledge, and 37.5% had good knowledge. While the relationship between attitudes and smoking behavior of students is 36 students who support and 28 students who do not support smoking behavior. There is a significant relationship between knowledge and student behavior with a value of p <0.05 (0.000) with a Contingency Coefficient (C) value category of 0.601 (strong relationship category). There is a significant relationship between the attitudes and smoking behavior of students with a p value of 0.05 (0.000) and a Contingency Coefficient (C) value of 0.672 (strong relationship category).Keywords: Knowledge, Attitude, Student Smoking Behavior.

/pdf/hubungan-pengetahuan-dan-sikap-dengan-perilaku-merokok-siswa-tkmlfhhb.pdf

Hubungan pengetahuan dan sikap dengan perilaku merokok siswa sman 3 kota pagar alam

This study aimed to create nano vegetable tanning materials of acacia bark extract. The process started with size reduction of acacia bark (16.7 mm x 4.9 mm x 1.8 mm), followed by counter current extraction of acacia bark with water at 80oC with 1:3 bark to water ratio in order to obtain extracts with density of 9-10oBe. Drying was done with a spray dryer. Particle size of the resulting powders was measured with particle size analyzer. Planetary ball mill was used for 6 hours to obtain average particle size of 72.9 nm. A variety of vegetable tanning materials were applied in the vegetable tanning process with varied concentrations of 15, 20, and 25%. The use of 25% nano vegetable tanning material of acacia bark extract gave the best results compared to liquid extract of acacia bark and mimosa. The properties of the leather obtained were tensile strength of 27.04 kg/cm2, elongation at break of 50%, shrinkage temperature of 84oC, and degree of tannage of 79.65%. Keywords: vegetable tanning material, nano particle, acacia bark, extraction, planetary ball mill. ABSTRAK Penelitian ini bertujuan untuk membuat bahan penyamak nano nabati dari ekstrak kulit kayu akasia. Proses pembuatannya dilakukan melalui tahapan pengecilan ukuran kulit kayu akasia (16,7 mm x 4,9 mm x 1,8 mm), dilanjutkan dengan ekstraksi kulit kayu akasia secara counter current menggunakan air 1:3 dengan suhu air awal 80oC sehingga diperoleh ekstrak dengan densitas 9-10oBe. Pengeringan dilakukan dengan spray dryer. Serbuk hasil spray dryer diukur partikelnya dengan particel size analyzer, kemudian diteruskan dengan pengecilan ukuran menggunakan planetary ball mill selama 6 jam sehingga diperoleh partikel berukuran rata-rata 72,9 nm. Berbagai bahan penyamak nabati diaplikasikan dalam proses penyamakan nabati pada kadar 15, 20, dan 25%. Penggunaan ekstrak nano nabati kulit kayu akasia sebesar 25% memberikan hasil terbaik dibanding ekstrak cair kulit kayu akasia maupun mimosa impor. Kulit tersamak yang dihasilkan memiliki kuat tarik sebesar 27,04 kg/cm2, kemuluran sebesar 50%, suhu kerut sebesar 84oC, dan derajat penyamakan sebesar 79,65%. Kata kunci: bahan penyamak nabati, partikel nano, kulit kayu akasia, ekstraksi, planetary ball mill.

/pdf/pembuatan-bahan-penyamak-nano-nabati-dan-aplikasinya-dalam-46ndcy2ttp.pdf

Dwi Ningsih

Papers

Study of BOD and COD Removal in Batik Wastewater using Scirpus grossus and Iris pseudacorus with Intermittent Exposure System

Uji Penurunan Kandungan COD, BOD pada Limbah Cair Pewarnaan Batik Menggunakan Scirpus Grossus dan Iris Pseudacorus dengan Sistem Pemaparan Intermittent

Penyuluhan tentang Gempa Bumi dengan Media Leaflet pada Masyarakat di Kelurahan Malabero Kota Bengkulu

Hubungan pengetahuan dan sikap dengan perilaku merokok siswa sman 3 kota pagar alam

Pembuatan bahan penyamak nano nabati dan aplikasinya dalam penyamakan kulit