In this paper the design and realisation of an integrated online water quality monitoring system will be described. The system has been applied specifically to monitor the DO (Dissolved Oxygen) and pH parameters in several shrimp aquaculture centersin Indonesia.The aim was to reduce energy consumption and to create optimumwater condition for the shrimp aquaculture.Using an automatic aeration system, the DO value has been maintained above 5 mg/l.On the other hand, data collected from the sensor measurements at each aquaculture can be accessed by SMS gateway or transmitted to the master station using telemetric system for further analysis or study.
Perkembangan budi daya ikan yang menggunakan keramba jaring apung (KJA), saat ini tersebar di berbagai waduk dan danau di seluruh Indonesia, saat ini tumbuh pesat dan menjadi andalan pendapatan daerah. Selama ini monitoring kualitas air dilakukan secara manual, yaitu melakukan pengukuran kualitas air di tempat budidaya ikan tersebut. Selain memerlukan waktu yang lama, biasanya budi daya ikan tersebut berada jauh dari pusat kota. Dalam makalah ini akan dijelaskan desain dan realisasi sistem monitoring kualitas air dan peringatan dini secara real-time yang terintegrasi. Sistem ini telah diterapkan secara khusus untuk memantau parameter suhu, DO (dissolved oxygen) dan pH di sentral budidaya ikan di Waduk Cirata. Tujuannya adalah memantau kualitas air secara real-time, bisa diakses di mana saja dan sekaligus mencegah kematian ikan secara massal yang disebabkan oleh terjadinya up-welling dengan menggunakan sistem peringatan dini. upwelling terjadi apabila nilai suhu menurun drastis mencapai 25 derajat celcius lalu nilai DO menurun sampai 2,38 mg/L. Di sisi lain, data dari stasiun pengukuran yang dikumpulkan di stasiun perantara dapat diakses atau dikirimkan ke stasiun pengendali dengan menggunakan sistem telemetri. Hasil dari penelitian ini memperlihatkan suatu sistem monitoring kualitas air untuk memantau parameter suhu, DO dan pH sekaligus peringatan dini terjadinya upwelling. Sistem ini untuk mendukung pembudidayaan ikan di danau-danau di Indonesia.
In this paper, a multi-path optical ring resonator (MpORR) on silicon-on-insolator (SOI) is proposed for sensitivity enhancement in liquid chemical sensing applications. It is designed on Silicon Dioxide (SiO 2 ) substrate and Silicon material as the core of optical waveguides. The proposed multi-path optical ring resonator can be realized with a wide free spectral value (FSR) of 3 THz. Therefore, the sensitivity of the sensor can be enhanced. Analysis and optimization of the proposed multipath optical ring resonator are discussed and reported for optical wavelength operation of 1550 nm. The proposed device can be used for identifying different liquid material precisely.
In this paper, it will be described the design and realization of online water quality monitoring system based on wireless sensor network (WSN). The new system has been implemented specifically to monitor parameters Dissolved Oxygen (DO), pH and temperature in one spot shrimp aquaculture in Bangka island. The aim was to create suitable water conditions for shrimp aquaculture and save the cost of energy consumption using an automated aeration system, by maintaining the value of the DO above 5 mg/L. On the other hand, water quality data collected from sensor measurements are sent to a data logger using WSN, and then the data is sent to a data center using cellular network (GPRS) such that this data can be viewed using the website. The experimental results show that the system has great prospects and can be used for shrimp aquaculture by providing information that is relevant and timely. The resulting data the collection can be used for research and analysis.
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