Judul: Perencanaan Sistem Perpipaan Limbah Cair Industri Batik Di Kampung Batik Cibuluh Bogor
Abstrak: Kampung Batik Cibuluh merupakan kampung tematik berbasis industri kreatif UMKM batik yang berlokasi di Kampung Neglasari, Cibuluh, Bogor Utara, Kota Bogor. Industri batik dan tekstil merupakan salah satu penghasil limbah cair yang berasal dari proses pewarnaan. Limbah industri batik umumnya memiliki warna yang pekat, berbau menyengat dan memiliki suhu, keasamam (pH), biochemical oxygen demand (BOD), chemical oxygen demand (COD), dan total suspended solid (TSS) yang tinggi. Apabila air limbah dibuang ke badan air tanpa diolah terlebih dahulu maka dapat menyebabkan pencemaran lingkungan. Tujuan penelitian ini yaitu merancang perpipaan air limbah industri batik dan menghitung RAB pembangunan perpipaan air limbah batik. Pengambilan data dilakukan di 8 rumah UMKM batik, meliputi data dan kondisi wilayah. Data sekunder berupa peta administrasi dan kontur yang akan digunakan dalam perhitungan kemiringan saluran. Data penggunaan air digunakan dalam perhitungan debit puncak. Nilai debit puncak (Qpeak) pada inlet IPAL sebesar 0.00408 m3/detik. Pengaliran menggunakan sistem gravitasi. Jenis pipa yang digunakan adalah pipa PVC (Polyvinyl Chloride) dengan diameter bervariasi dari 1 inchi, 1.5 , 2.5, dan 3 inchi. Kedalaman galian mulai dari 0.15 m hingga 1.94 m. Terdapat dua pipa utama menuju IPAL. Rencana Anggaran Biaya yang dibutuhkan untuk perencanaan sebesar Rp 274,656,507., Kampung Batik Cibuluh is a thematic village based on the creative industry of batik UMKM, located in Neglasari Village, Cibuluh, North Bogor, Bogor City. Batik and textile industry are producers of liquid waste from the coloring process. The batik industrial waste generally has thick color, a strong odor and high temperature, acidity (pH), biochemical oxygen demand (BOD), chemical oxygen demand (COD), and total suspended solid (TSS). If wastewater is discharged into drains without being processed first, it can cause environmental pollution. The purpose of this research is to design batik industrial wastewater piping and calculate the budget for the construction of batik wastewater piping. Data retrieval was carried out in 8 UMKM batik houses, including data of the maximum water use in batik coloring and regional conditions. Secondary data is an administrative map and contour maps that will be used in calculating the slope of the channel. Water usage data is used in calculating the peak discharge. The peak discharge value (Qpeak) at the IPAL inlet is 0.00408 m3 /s. Flow using a gravity system. The type of pipe used is PVC (Polyvinyl Chloride) pipe with diameters varying from 1 inch, 1.5, 2.5, and 3 inch. The depth of excavation is from 0.15 m to 1.94 m. There are two main pipes leading to the WWTP. Real estimate of cost for planning is IDR 274,656,507.
Keyword: Batik, diameter, discharge, piping, wastewater

Judul: Pemodelan spasial untuk penentuan lokasi instalasi pengolahan air limbah (ipal) batik di Kota Pekalongan, Jawa Tengah
Abstrak: Pekalongan located at North Java Beach in 6°50’44’’S and 109°37’55’’E, 6°55’44’’ S and -109°42’19’’ E. In 2011, population density of Pekalongan was 7,027 individu/km2 and 76% of the societies work in industrial sector with 69.5% of them work in industrial batik sectors. The total of industries in 2011 was 2,916 unit (small and medium industrial scale). The 99.8% of industries in Pekalongan are dominated by small scale industries with 83.1% of them were batik industries. In Pekalongan, it is only 0.6% of all textile industries which have wastewater treatment plants and the others textile industries disposed their wastewater into water bodies directly. For solving that problems, in 2003, The government of Pekalongan built the batik wastewater treatment plant in Jenggot and in 2009, it is continued build the batik wastewater treatment plant in Kauman. However, the locations and the capacities of the wastewater treatment plants could not handle the debit of wastewater from whole district in Pekalongan. Based on the reason, this research aimed to determine the best location of batik wastewater treatment plant by building a model using ArcObject. The specific objective of this research consist of indentified the impact of batik wastewater to water bodies qualities, determined the criteria of batik wastewater treatment, arrange the criteria of batik wastewater treatment using analytical hierarchy process, built a model to determine the best location of batik wastewater treatment plant and determined some the best location of batik wastewater treatment in Pekalongan. This research informed that the environmental problems due to batik wastewater in Pekalongan affected the water bodies quality. There are some water quality parameters were not comply to the The Government Regulations No. 82/2001. It implied to the increase of sedimentation, blooming algae, decrease of turbidity and the death of terestrial water biota. Based on literature study, the criteria of batik wastewater treatment consist of technical criteria, social, economy and environment. By using the AHP method, this research found that the priorities of wastewater are environmental load, wastewater debit, poppulation density, education, energy and economy. Whole procedures of determine the location for batik waste water treatment plant were resumed as a model using ArcObject. Based on the output of the program and analysis result, the result of the research recommended six location for batik wastewater treatment plant in Pekalongan. They are Jenggot, Kauman, Tirto, Pabean, Landungsari and Degayu district.
Keyword: Batik, Batik wastewater, Batik Wastewater Treatment Plant, Spatial modelling

Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
Keyword: