6 research outputs found
BIOASSESSMENT KUALITAS AIR DENGAN MENGGUNAKAN MAKROZOOBENTOS DI SUNGAI BATANG ARAU, KOTA PADANG
No full textPenelitian mengenai Bioassessment Kualitas Air dengan Menggunakan Makrozoobentos di Sungai Batang Arau, Kota Padang telah dilakukan pada bulan Maret - September 2021. Penelitian ini bertujuan untuk mengetahui komposisi dan struktur komunitas makrozoobentos serta kualitas air di Sungai Batang Arau berdasarkan indeks BMWP-ASPT. Penelitian ini mengunakan metode survey dan penentuan stasiun dengan purposive sampling, berdasarkan rona lingkungan. Sampel makrozoobentos diambil menggunakan surber net 30x30 cm2 dan eckman grab ukuran 15x15 cm2, dan juga dilakukan pengukuran faktor fisika kimia perairan. Hasil penelitian menunjukkan bahwa komunitas makrozoobentos yang ditemukan di Sungai Batang Arau sebanyak 37 genera dengan komposisi Gastropoda 6 genera, Insecta 28 genera, Hirudinea 2 genera, dan Oligochaeta 1 genus. Kepadatan total makrozoobentos berkisar 140-1775 ind/m2 dengan kepadatan tertinggi terdapat pada Stasiun V dan terendah terdapat pada Stasiun III. Genus predominan (KR ≥ 10%) yang ditemukan pada setiap stasiun bervariasi. Pada Stasiun I dan Stasiun II yaitu Orthocladius dan Caenis; Stasiun III yaitu Polypedium, Orthocladius, Baetis, dan Elophila, Stasiun IV yaitu Orthocladius, Caenis, Erpobdella, Hellopdella, dan Tubifex, dan Stasiun V yaitu Melanoides. Indeks keanekaragaman makrozoobentos di Sungai Batang Arau yaitu 2,38 dengan kisaran H’ = 0,5-2,57 tergolong rendah sampai sedang, dan distribusi populasi makrozoobentos yaitu 0,65 dengan kisaran E = 0,25-0,8 tergolong tidak merata sampai merata . Kualitas perairan di Sungai Batang Arau berdasarkan indeks BMWP-ASPT pada Stasiun I dan II tergolong tidak tercemar, Stasiun III tercemar ringan, Stasiun IV tercemar sedang, dan Stasiun V tercemar berat
Water Quality Bioassessment Using Macrozoobenthos In The Batang Arau River, Padang City
No full textResearch on Water Quality Bioassessment Using Macrozoobenthic in the Batang Arau River, Padang City was carried out in March - September 2021. This study aims to determine the composition and structure of the macrozoobenthic community and water quality in the Batang Arau River based on the BMWP-ASPT index. This research uses the survey method and station determination by purposive sampling, based on environmental conditions. Macrozoobenthic samples were collected by using Surber net 30x30 cm2 and Eckman grab 15x15 cm2, and physical and chemical factors were also measured. The results showed that the macrozoobenthic communities found in the Batang Arau River were 37 genera with the composition of 6 genera Gastropods, 28 genera Insect, 2 genera Hirudinea, and 1 genus Oligochaeta. The total density of macrozoobenthic ranged from 140-1775 ind/m2 with the highest density at Station V and the lowest at Station III. The predominant genus (KR ≥ 10%) found at each station varied, Station I and Station II were Orthocladius and Caenis; Station III was Polypedium, Orthocladius, Baetis, and Elophila, Station IV was Orthocladius, Caenis, Erpobdella, Hellopdella, and Tubifex, and Station V was Melanoides. The diversity index of macrozoobenthic (H') in the Batang Arau River was 2.38 ranging from 0.5-2.57 classified as low to moderate, and the distribution of the macrozoobenthic population (E) is 0.65, ranging from 0.25-0.8 classified as uneven to equally. The water quality in the Batang Arau River based on the BMWP-ASPT index at Stations I and II are classified as unpolluted, Station III was lightly polluted, Station IV was moderately polluted, and Station V was heavily polluted
Increasing Marketing (Distribution) Of Isal Cookies Msmes Products Using The Whatsapp Application
No full textMarketing development is one of the main challenges faced by Micro, Small and Medium Enterprises (MSMEs) in improving competitiveness and reaching a wider market. The article used a situational approach from a community service program, which aims to improve the marketing and distribution of Isal Cookies MSMEs products through the use of the WhatsApp application. The strategy used by the author is the data collection method, which is to collect information from the population and samples that have been selected directly. Through hands-on training and mentoring, this program helps businesses understand and optimize the use of WhatsApp Business as an effective marketing tool. These activities include setting up business profiles, managing product catalogs, and communication strategies with customers. The results of this activity show that the utilization of WhatsApp Business can improve marketing efficiency and product distribution, as well as expand market reach. This approach is expected to be a model that can be adopted by other MSMEs to utilize technology to improve their business performance
A scalable and chemical-free strategy for antifouling ultrafiltration PVDF membranes via hydrophilic macromolecular surface modification
No full textFouling is a major challenge in oily wastewater treatment, leading to increased operational costs and reduced membrane performance. This study aims to develop a modified PVDF ultrafiltration (UF) membrane with enhanced antifouling properties using hydrophilic surface-modifying macromolecules (LSMMs) through a simple blending and phase inversion process. PVDF membranes were fabricated by incorporating LSMMs into the dope solution. During phase inversion, LSMMs spontaneously migrated to the membrane-air interface, forming a stable hydrophilic and negatively charged surface layer. The membranes were characterized for their permeability, oil rejection, antifouling performance, and long-term stability under continuous operation. The optimized L0.50 T-PVDF membrane exhibited a 58% increase in pure water flux (880 L m−2 h−1) and 99.9% oil rejection. Irreversible fouling was eliminated (Rir = 0%), with a 100% flux recovery ratio (FRR) sustained over five cleaning cycles. Continuous 24 h filtration maintained a stable permeate flux of 775 L m−2 h−1, indicating excellent durability. LSMM-induced surface modification effectively mitigates membrane fouling by preventing pore blockage and foulant adhesion, eliminating the need for chemical cleaning. This approach offers a sustainable, scalable, and cost-effective solution for industrial oily wastewater treatment. Future work will explore pilot-scale validation, LSMM formulation optimization, and performance evaluation under varied operating conditions.First author (Komathi Kannathasan) would like to express gratitude to the Ministry of Higher Education, Malaysia under HICoE grant, R.J090301.7851.4J657 and Universiti Teknologi Malaysia for the financial funding under Hi-Tech (F4) grant Q.J130000.4609.00Q14.
Open access funding provided by The Ministry of Higher Education Malaysia and Universiti Teknologi Malaysia. Ministry of Higher Education,R.J090301.7851.4J657,Juhana Jaafar,Research Management Centre,Universiti Teknologi Malaysia,Q.J130000.4609.00Q14,Juhana Jaafa
Physicochemical Properties and Photodegradation and Separation Performance of Translucent Hollow Fiber Polyvinylidene Fluoride: Effect of Hydrophilic Surface Modifying Macromolecules Loading
No full textOil produced water (OPW) is a significant waste product of oil and gas industry, with varying composition depending on location and age. Although membrane separation is effective for treating OPW, its susceptibility to severe fouling and limited options for addressing fouling require urgent technological advancements. To address this challenge, present study successfully designed a novel membrane material that exhibits promising potential. Translucent hollow fiber polyvinylidene fluoride (T-PVDF) photocatalytic membrane was fabricated. Hollow nanofiber graphitic carbon nitride (HCN) was immobilized into the T-PVDF membrane via blending method. Hydrophilic surface modifying macromolecules (LSMM) at 0.25 wt. %, 0.50 wt. % and 0.75 wt. % loading helped producing non-delaminated T-PVDF photocatalytic membrane by adjusting the dispersion HCN in the membrane structure. The translucency of LSMM membranes were recorded more than 80° where the translucency decreases upon increase in loading of LSMM owing to the nature of LSMM which resulted in the degradation efficiency of the immobilized HCN to 90.0%. Owing to its non-delaminated morphology, the pure water flux (PWF), permeate flux (PF) and rejection with and without visible light irradiation is high. Among the LSMM membranes, T2-PVDF membrane showed the best performance with 770 L.m-2.h, 520 L.m-2.h and 97% for PWF, PF and rejection without visible light irradiation, respectively. Under visible light irradiation, the PWF, PF and rejection for the similar membrane has increased and recorded to be 890 L.m-2.h, 850 L.m-2.h and 99.0%, respectively. The findings concludes that translucency and membrane morphology are important factors in achieving effective membrane performance and photodegradation.First author (Komathi Kannathasan) would like to express gratitude to the Ministry of Higher Education, Malaysia under HICoE grant, R.J090301.7851.4J433, Ministry of Science, Technology and Innovation, Malaysia under International Collaboration Fund, IF0120I1176, and Universiti Teknologi Malaysia for the financial funding under Hi-Tech (F4) grant Q.J130000.4609.00Q14
