scholarly journals Automated monitoring and controlling pH levels for hydroponics cultivation technique

2020 ◽  
Vol 18 (3) ◽  
pp. 1236
Author(s):  
Mohammad Farid Saaid ◽  
Ahmad Ihsan Mohd Yassin ◽  
Nooritawati Md Tahir
Keyword(s):  
Water Content ◽  
Ph Value ◽  
Ph Sensor ◽  
Nutrient Elements ◽  
Syringe Pump ◽  
Automated Monitoring ◽  
Hydroponic Cultivation ◽  
Cultivation Technique ◽  
Water Ph ◽  
Ph Level

<span>A hydroponics plant can grow healthily with sufficient nutrient, temperature, light, humidity as well as pH level that is indeed vital in ensuring the plants will absorb maximum nutrient elements required. This paper presents automated monitoring and controlling pH levels for the hydroponic cultivation technique. In this study, automated monitoring and controlling of pH levels are developed specifically for the hydroponic cultivation technique. There are three main methods that involved in the development of the system namely hardware, programming and functionality test. Firstly, users need to set the maximum and minimum pH levels as required by the plant. Then, the pH sensor will monitor the real-time pH level of the water. A syringe pump that contains a pH up solution (alkaline) and a pH down solution (acid) will drip the solutions to neutralize the water content if the water pH level is not within the stated ranges as set by the user. Results showed that the automated monitoring and controlling pH levels were successfully developed and functionality was tested and confirmed as desired. The syringe pumps responded perfectly upon changes of the water pH value based on the validation done that showed 100% accuracy of the syringe pump responds. </span>

Design Concept of Two Tank Reservoirs to Maintain pH Value for Tiger Prawn

2014 ◽  
Vol 660 ◽  
pp. 851-856
Author(s):  
Badrul Aisham Md Zain ◽  
Muhammad Farhan Khasim ◽  
Salihatun Md Salleh ◽  
Md Saidin Wahab
Keyword(s):  
Control System ◽  
Ph Value ◽  
Ph Sensor ◽  
Monitoring And Control ◽  
Shrimp Culture ◽  
Water Storage Tank ◽  
Slaked Lime ◽  
Tiger Prawn ◽  
Water Ph ◽  
Ph Level

Shrimp culture is the fastest growing sector of the aquaculture industry in Malaysia. In culturing tiger prawn, the pH level needed for water is around 7.0-8.5. Currently, prawn farmer in Malaysia still using a manual method to control the water pH level by adding chemical (Lime), in which, the process required constant monitoring and control by labor. Since the prawns are so sensitive on pH level, an automatic pH control system is required to maintain the water pH automatically and precisely. This research was conducted to design a system that can control and provide feedback on the changes of pH level and been implemented at the reservoir tank that can act as water storage tank and prawn pond. Control system and pH sensor are the important components in controlling the pH level. Input from pH sensor was processed by controller. Moreover, after an error is detected by controller, the correction will be delivered to the system as a feedback process. Nitric acid with concentration of 0.001M was added to 25 liter water in tank 1 so that the pH level is decreased to pH 3.00. Different concentrations were used for slaked lime; 0.5M, 0.4M. 0.3M, 0.2M and 0.1M, to increase the pH from acid to slightly alkaline in the range of pH value 7.00-8.50. Slaked lime was pumped to Tank by water pump and it will stop if the pH level reaches the setting level. The time for the system to recover from pH 3.00 to 7.00-8.50 was recorded. The results shows that slaked lime with the concentration 0.5M has the fastest recover time which was 29s follow by 0.4M in 69s, 0.3M in 92s, 0.2M in 151s and 0.1M in 252s, respectively.

scholarly journals Pengembangan Prototype Sistem Kendali Kualitas Air Tambak Udang

2019 ◽  
Vol 4 (1) ◽  
pp. 75-82
Author(s):  
Avara Ghamaliel Ty ◽  
Pramudi Utomo
Keyword(s):  
Water Quality ◽  
Performance Test ◽  
Ph Value ◽  
Ph Sensor ◽  
Average Error ◽  
Water Quality Control ◽  
Water Ph ◽  
And Performance ◽  
Ph Level ◽  
Main Component

The purpose of this article is to describe the analysis, design and performance of prototype shrimp water quality control systems. This tool is expected to simplify and ease the work of shrimp farmers in checking water quality regularly. In its design consists of several steps, namely designing the design of tools, making mechanical systems, programming, and the final stage of testing. The main component that is used as the main control is Arduino Nano. Salinity sensor, DS18b20, and PH-4520C as components for monitoring water quality. 12V DC water pump as a stabilizer of the pH level in the water. Based on the results of testing the average error for the water temperature sensor, water pH sensor and salinity sensor are 0.74%, 2.06%, and 3.60%, respectively. The three error values are less than 10%. Based on the results of testing the pH of water, liquid pH up will be sprayed when the pH value of the water is less than 6.5. While the liquid pH down will be narrowed when the pH value of water is less than 8. The results of this performance test can work in accordance with the function and purpose.

scholarly journals Development of a Low-Cost pH Meter for Liquid Chemical Fertilizers

2020 ◽  
Vol 8 (4) ◽  
pp. 840-846
Author(s):  
Muhittin Yağmur Polat ◽  
Abdullah Beyaz ◽  
İbrahim Çilingir
Keyword(s):  
Ph Value ◽  
Low Cost ◽  
Ph Sensor ◽  
Field Application ◽  
Average Error ◽  
Chemical Fertilizers ◽  
Modern Agriculture ◽  
Ph Values ◽  
Water Ph ◽  
Liquid Chemical

Liquid chemical fertilizers are widely used in modern agriculture. The pH values of these fertilizers are important in terms of their effectiveness in the field application and their effect on the soil-water pH balance. Therefore, it is necessary to measure the pH and other properties of liquid fertilizers with fast, practical and inexpensive methods. With the advancing technology, pH value has been started to measure more accurately and efficiently with the help of low-cost devices. In this study, a low-cost pH meter was developed using a low-cost pH sensor, an Arduino UNO R3 microcontroller board, and a software written in the C/C++ programming language. The developed pH meter was used to measure the pH values of liquid chemical fertilizers. Close variations were observed between the values obtained from it and the values measured by an accredited, laboratory-type pH meter. According to the pH measurements of the two pH meters, R2 ranged 88.1% to 99.3%, average error range 0.14 to 0.28, and average error percentage ranged 1.56% to 6.81% for three different types of liquid fertilizers. In light of these results, it was shown that the developed low-cost pH meter can be useful for practical pH measurement applications.

scholarly journals Monitoring Kekenyalan Tahu Kedelai dengan Sensor Kapasitif Menggunakan Mikrokontroller Berbasis Android

2021 ◽  
Vol 2 (1) ◽  
pp. 35-42
Author(s):  
Rizki Putri Nur Laili ◽  
Farida Arinie Soelistianto Arinie Soelistianto ◽  
Nanak Zakaria ◽  
Nurul Hidayati
Keyword(s):  
Storage Temperature ◽  
Ph Value ◽  
Ph Sensor ◽  
Capacitive Sensor ◽  
Test Results ◽  
Quality Of Data ◽  
Metal Plates ◽  
Ph Level ◽  
Output Information

Tofu has the best quality vegetable protein because it has the most complete amino acid composition and is believed to have high digestibility (85% -98%). According to SNI 01-3142-1998 and SII No. 0270-1990 testing criteria for soy tofu based on smell, taste, color, appearance, or texture. Tofu soybeans are prone to physical or texture damage due to factors such as inappropriate pH levels and insufficient storage which results in damaged tofu. Therefore in this study, it is proposed to determine the elasticity of soy tofu with the parameters tested are the pH level in the manufacture of soy tofu, the storage temperature, and the capacitance value to see how thick the tofu is with a capacitive sensor using the capacitor principle. Where the parallel plate capacitor is a capacitor consisting of two parallel metal plates. The test results of all sensors are sent to the database and will be displayed on the page on the Android application which will provide real-time sensor output information to the user. Based on the results of testing on this system using a pH sensor, the pH value is around 3-4 which indicates that the pH level used is very good for use in tofu processing, at pH 4.56 with storage at 29 ° C the highest elastic capacitance value is 3.58.  In testing data delivery, the throughput value is 4336,217 b / s and the smallest delay value is 0.017ms because the smaller the delay value, the better the quality of data transmission because there will be no delay in sending data.

scholarly journals Rancang Bangun Alat Pendeteksi Kelayakan Air Menggunakan Sensor PH

2019 ◽  
Vol 4 (1) ◽  
pp. 127
Author(s):  
Fitri Ariska ◽  
Irawan Hadi ◽  
Lindawati Lindawati
Keyword(s):  
Air Quality ◽  
Ph Value ◽  
Liquid Crystal Display ◽  
Ph Sensor ◽  
Measuring Device ◽  
Measurement Results ◽  
Turbidity Level ◽  
The Republic ◽  
The Government ◽  
Ph Level

One parameter of air quality is the level of turbidity and acidity. For most people, air quality is considered insignificant because it is inappropriate for aesthetics. Good water to be issued according to regulations issued by the government through the Minister of Health of the Republic of Indonesia has a pH value of 6.5 - 8.5 and the maximum turbidity level is 5 NTU (Nephelometric Turbidity Unit). Therefore the author makes a measuring device for acidity in water to facilitate the use of water that will be used by the community. Processing the measurement results is carried out by a pH sensor which will be processed by the Arduino Uno Microcontroller and produced with output via LCD (Liquid Crystal Display). In this test, the author uses several air samples that have been determined by the government, namely pH 4, pH 7 and pH 10. And from several other samples using water that is reasonably suitable for consumption with a pH level of 6.5 and above and can be used as Neutral.

scholarly journals PH control for deep flow technique hydroponic IoT systems based on fuzzy logic controller

2020 ◽  
Vol 8 (4) ◽  
pp. 323-329
Author(s):  
Adnan Rafi Al Tahtawi ◽  
Robi Kurniawan
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Ph Value ◽  
Ph Control ◽  
Feeding Duration ◽  
Liquid Feeding ◽  
Hydroponic Cultivation ◽  
Deep Flow Technique ◽  
Ph Level ◽  
The Internet Of Things

In hydroponic cultivation sites, pH control is still carried manually by checking the pH level with a pH meter and providing a pH balancing liquid manually. This study aims to design an automatic pH control system in the Deep Flow Technique (DFT) hydroponic system that uses the Internet of Things (IoT) based Fuzzy Logic Controller (FLC). The SKU SEN0161 sensor detects the pH value as FLC inputs in an error value and its changes. These inputs are processed using Mamdani FLC embedded in the Arduino Mega 2560 microcontroller. The FLC produces an output in a pH liquid feeding duration using the peristaltic pump. The results showed that FLC could maintain the pH value according to the set point with a settling time of less than 50 seconds, both with disturbance by adding pH liquid and without disturbance. The pH value can also be displayed on the website interface system as a monitoring system.

The Electrical Signals Measurement for Silicon Nanowires pH Sensor

2015 ◽  
Vol 1109 ◽  
pp. 219-222
Author(s):  
M.N. Md Nuzaihan ◽  
U. Hashim ◽  
Mohd Khairuddin Md Arshad ◽  
A. Rahim Ruslinda ◽  
A.H. Azman
Keyword(s):  
Silicon Nanowires ◽  
Ph Value ◽  
Ph Sensor ◽  
Electrical Performance ◽  
Electrical Signals ◽  
Buffer Solutions ◽  
Source Current ◽  
Ph Buffer ◽  
Ph Level ◽  
Nanowires Array

In this work, we report the geometrical characteristics and the electrical performance of silicon nanowires array for pH level detection. The smallest silicon nanowires structure is 40 nm width and 400 μm length. The Silicon Nanowires Array is tested with pH buffer solutions of pH4, pH7 amd pH10. Direct current (DC) measurement is the most common method of detecting the electrical signals of silicon nanowires sensor. The results show that the IV characteristic is directly proportional and the pH sensitivity calculated from linear relation between the drain-source current vs the pH value was 1.4nA/pH. These results are important for future biosensing experiments and data analysis using Silicon Nanowires Array devices.

Some Properties and Detection Methods of Paper Sludge

2012 ◽  
Vol 560-561 ◽  
pp. 52-56
Author(s):  
Kai Zhang ◽  
Chao Jun Wu ◽  
Jia Chuan Chen
Keyword(s):  
Water Content ◽  
Organic Material ◽  
Ph Value ◽  
Optical Microscope ◽  
Ash Content ◽  
Detection Methods ◽  
Paper Sludge ◽  
Sludge Treatment ◽  
Material Content ◽  
The Third

Some properties of paper sludge were analyzed, including water content, organic material content, pH value, fiber content, ash content ,C, H, S, N content and metal content of sludge in three sedimentation tanks.Besides,COD,SS, sludge concentration were analyzed and optical microscope photoes of sludge were got.The results showed that water content was high, organic material content was high, pH value of three sludges was alkalescent, metal elements were varied, lots of bacteria in wet sludge. From the first tank to the third one,COD and SS are gradually diminishing The research of sludge’s properties may be helpful to sludge treatment.

Comparative Analysis on Chemical Composition and Charcoal Characterization of Two Miscanthus Species

2011 ◽  
Vol 415-417 ◽  
pp. 1265-1272
Author(s):  
Wen Biao Zhang ◽  
Wen Zhu Li ◽  
Bing Song Zheng
Keyword(s):  
Chemical Composition ◽  
Specific Surface ◽  
Water Content ◽  
Surface Area ◽  
Specific Surface Area ◽  
Ph Value ◽  
Perennial Grass ◽  
Water Extract ◽  
Carbonization Temperature ◽  
Hot Water

Miscanthus is a highly productive, rhizomatous, C4 perennial grass that should be considered as an excellent active carbon precursor. This paper compares the charcoal characterization and chemical composition between M. sinensis and M. floridulus. Species differed in water content, hot water extract, 1% NaOH extract, organic solvent extract, cellulose, lignin and ash. Carbonization temperatures have effects on charcoal yields of Miscanthus, which ranged from 23.5% to 48.0% for M. sinensis and 11.3% to 37.2% for M. floridulus. Water content, charcoal density, pH value, and specific surface area of charcoal characterization varied between two species of Miscanthus. The specific surface area increased with the increase of carbonization temperature. The highest specific surface area of M. sinensis and M. floridulus was 351.74 m2g−1and 352.74 m2g−1, respectively, when the carbonization temperature was 800°C.

STUDY ON TIME-CONSTANT MODELS OF SnO2pH SENSOR

2009 ◽  
Vol 21 (06) ◽  
pp. 449-452
Author(s):  
Chi-Wei Chen ◽  
Jung-Chuan Chou ◽  
Tai-Ping Sun ◽  
Shen-Kan Hsiung
Keyword(s):  
Time Constant ◽  
Electrochemical Impedance ◽  
Ph Value ◽  
Ph Sensor ◽  
Membrane Resistance ◽  
Hysteresis Effect ◽  
Equivalent Model ◽  
Resistance Change ◽  
Ph Buffer ◽  
Function Relationship

The aim of this study was to discuss the hysteresis effect of SnO2 pH sensor based on separative extended gate field effect transistor (SEGFET). Based on the theorem of three time-constants model, hysteresis model is linked with drift effect. Function relationship of pH value and time constant is also derived from the drift effects with difference pH value. Besides, electrochemical impedance spectroscopy (EIS) is utilized to interpret the mechanism of hysteresis effect. Experiments of EIS are carried out in different pH buffer solutions. An equivalent model of sensing membrane is obtained by theorem of EIS. The experimental results indicate that the equivalent circuit elements, such as membrane capacitance and membrane resistance, change with pH. This phenomenon is compared with other literatures and discussed on hysteresis effect.

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