Batik merupakan kerajinan melukis menggunakan media kain. Salah satu jenis batik yang digemari yaitu batik Pekalongan yang mempunyai kekhasan menggunakan hingga delapan jenis warna. Kendala yang dialami IKM Batik Kraton bahwa perilaku konsumen yang berubah-ubah mempengaruhi permintaan produk batik dan secara langsung dapat mempengaruhi proses produksi batik. Perusahaan harus memperhatikan manajemen rantai pasoknya untuk menghasilkan rantai pasok yang bagus. Pengukuran kinerja rantai pasok akan dilakukan untuk mengetahui apakah rantai pasok industri tersebut unggul atau tidak dalam mengelola rantai pasok. Pengukuran kinerja akan melibatkan proses-proses rantai pasok dan metrik indikator. Metode yang digunakan dalam penelitian ini adalah Model SCOR 12.0 dan Analytical Hierarchy Process yang mana untuk tipe proses produksinya yaitu make to order. Hasil dari pengukuran kinerja rantai pasok menunjukan rata-rata nilai 69,39 di mana nilai tersebut termasuk ke dalam kategori average atau sedang. Masing-masing nilai kinerja proses inti, yaitu plan, source, make, deliver, return, dan enable adalah 87,05; 94,25; 68,13; 79,79; 75,47; 11,66. Diketahui bahwa nilai kinerja proses yang tertinggi yaitu source dan yang terendah adalah enable. Indikator-indikator ini menginformasikan bahwa proses rantai pasok di IKM Batik Kraton masih memerlukan perbaikan di beberapa sektor.
The use of microalga Spirulina is developing rapidly in the industry. Spirulina biomass is widely used in the food, pharmaceutical and cosmeceutical industry because it is rich in biochemicals and antioxidants that are beneficial to human health. This study aimed to determine the biopigment contents in S. platensis and examine the sequences of continuous extraction process to obtain the optimal biopigment yields. Biopigments of S. platensis extracted in this study were total chlorophyll of 52.28 μg/mL (25.28 μg/mL chlorophyll a and 27 μg/mL chlorophyll b), total carotenoid of 7.9 μg/mL and phycocyanin of 0.020 mg/L. In addition to biopigments, a residue in the form of solid powder was also produced at 20.7 % of biomass. Simultaneous extraction of chlorophyll and total carotenoids was successfully applied in this study, while the optimal phycocyanin extraction should be further developed. The optimal extraction sequence of biopigments was extraction of chlorophyll then carotenoid with low heating and followed by extraction of phycocyanin.
Chlorella sp. is a microalga with a size of less than 30 μm that requires a dewatering process to separate its biomass from the culture media, for instance using the flocculation method. In this study, chitosan nanoemulsion was used as the bioflocculant. The aim of this study was to investigate the effectiveness of harvesting Chlorella sp. biomass using chitosan nanoemulsion with varied doses and predetermined pH levels. The pH and bioflocculant dose affected the amount of biomass recovered during the harvesting process. The results showed that treatment at pH 9 and a dose of 2 gL−1 bioflocculant achieved the highest harvesting efficiency of 98.7%. The characterization of bioflocculant was carried out in the form of proximate analyses on chitosan nanoemulsion which resulted in 95% ash and 90% water contents. The appearance tests showed characteristics of yellow in color, sour aroma, and gel-shaped texture. The physical tests were also performed resulting in a pH of chitosan nanoemulsion of 4.3, viscosity of 15.5 cps, and a density of 1.912 cm/g. This study indicated that chitosan nanoemulsion is considered efficient for use as an alternative bioflocculant for harvesting Chlorella biomass.
The main objective of this study was to determine whether vermicompost can be used as an organic pond fertilizer to improve water quality and survival rate of catfish fry (Clarias sp.). The experiment was conducted for 4 weeks (28 days) with duplicates in two ponds. The control (pond C) did not apply any vermicompost, while the treated pond (pond V) was administered by the vermicompost. Vermicompost dose of 2.56 g/L was found to be a suitable dose for catfish fry. The results showed that the total nitrogen content in the control pond was decreased from 0.45 mg/L to 0.25 mg/L. In the experimental tank, the total nitrogen content was increased from 0.25 mg/L to 0.45 mg/L. Likewise, the fish length and weight of the two treatments were significantly different.
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