Judul: Utilization of PT. Krakatau Tirta Industri water treatment plant sludge as compost raw materials
Abstrak: The process of making capsule package produces waste in form of mud which has to be disposed periodically. The mud contains such elements as Ca, N and P that are useful for plants. This study was aimed to utilize the mud as a mixture of compost media for caisin plant (Brassica rapa L). The research used a completely randomized design with Advanced Duncan Test at a level of a = 5%. The waste (L) doses used were 0 g, 250 g, 500 g and 750 g, and the compost (L) doses were 0 g, 250 g, and 500 g. The addition of compost in this research could improve the physical properties of soil, making it not too tough to be able to bind water and nutrients. The research result showed that the mud had a significant effect on vegetative growth such as the height of plants, the width of leaves, and the number of leaves. Treatments K3L2 (K 500 g + L 250 g), K2L4 (K 250 g + L 750 g), and K2L3 (K 250 g + L 500 g) indicated very good results, while treatment K1L1 (without the addition of compost and waste) showed unsatisfactory results, with each treatment having a value of 22.65 cm, 7.86 cm and 7.67 leaves.
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Judul: Analisis Up Take Kandungan Logam Berat dari Kompos Lumpur Water Treatment Plant oleh Tanaman.
Abstrak: Utilization of sludge processing results are very minimal and less noticed by many among the industry. This research aims to identify the feasibility of compost of sludge processing drinking water as a medium for planting, identifying the presence of heavy metals content in the compost that is absorbed in plants, and degrades the contents of heavy metals in sludge by means of fitoremediasi. The method used is the utilization of compost as a medium for planting without WTP mixed soil. On testing using three kinds of different compost WTP. Compost 1 comes from WTP PT. Krakatau Tirta Industry, Cilegon, West Java. Compost 2 comes from WTP PDAM Tirta Pakuan Bogor, West Java. Compost 3 comes from WTP PDAM Tirta Kahuripan Cibinong, West Java. On the third having a lush growth of vegetation and experience the process of degradation the heavy metals. The results of the three trials heavy metal content in plants after harvest showed values above the threshold limit of SNI 7387 in 2009 about The Limit of Heavy Metal Contamination in Food. Composting plant using WTP is not safe for consumption. Degradation of heavy metals in the form of mud at the WTP to harvest heavy metals impaired. This demonstrates the feasibility of the utilization of WTP sludge by composting and application of the growing media. Compost WTP can fertilize the plants, but not for food crops.
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Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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