RANCANG BANGUN KONTROL KADAR AMONIA DAN PH AIR BERBASIS ARDUINO PADA BUDIDAYA IKAN

In the fish pond ecosystem there are various factors that can inhibit fish growth or even kill fish, one of which is the water factor, the water itself has various factors, one of which is the quality of PH levels and amonia levels. Therefore, this paper discusses the design and manufacture of a control device for PH levels and amonia levels to make it easier for farmers to check PH levels and amonia levels in the pond. This control device uses a DFROBOT V.2 sensor as a PH sensor and a DS18B20 sensor as a temperature sensor as well as an Arduino UNO controller. The method used to control amonia is by comparing the data from PH and the temperature in the pool water, this tool will work if the amonia level is higher. from 0.8ppm by activating the aerator to keep the amonia in the pool water normal. Meanwhile, to maintain the PH of the water more than 6 and less than 7, it is necessary to add pond water by activating the water pump. The results of this study can be used as a reference for future research for the development of Arduino Uno-based PH and amonia level control devices.

Bayesian networks application to forecast the national economies development taking into account the water factor

The influence of this factor on the development of national economies is studied. This study uses the Bayesian network, which illustrates the interaction of indicators of water supply and water use and includes nodes that are formally represented as vectors. The most valuable result of the modelling is not the general forecast obtained with the help of the model, but the structure of the network itself, which allows to identify connections within the model and explain the reason for the emerging interdependencies. modelling using Bayesian networks confirmed the fact that there is a direct relationship between GDP and water consumption and drainage. The obtained results confirm the possibility of achieving an increase in the overall GDP of the country with an increase in the amount of water resources used for production needs. However, this should be implemented in combination with a simultaneous reduction in the volume of return (wastewater) discharged into surface water bodies.

Early Age Physical Properties of Porous Concrete Containing Slag Nickel Aggregate under Compression

The scope of this research is to make hollow concrete using Nickel Slag and compare it with crushed stone aggregate. The purpose of this study was to determine the amount of workability, porosity, permeability, and tensile strength of porous concrete, and to determine the effect of the 05-10 and 10-20 grading of the aggregate on the tensile strength, porosity and permeability of porous concrete. This study used an experimental method using aggregates with uniform gradations. The aggregates used are nickel slag and crushed stone with uniform gradations of 05-10 and 10-20. The cement water factor (FAS) used in the mix design is 0.35 and the cavity in the concrete is 20%. Workability testing is carried out after the fresh concrete is finished. mixed with the composition according to the mix design. Tensile strength test, with the compressive strength machine method performed at the age of the concrete 3 and 7 days. From the analysis with qualitative methods, porous concrete containing nickel slag and crushed stone in gradations 5 - 10 and 10 - 20 obtained the highest compressive strength values in the nickel slag aggregate mixture 5-10 and 10-20 of 10.70Average - average 10.51 MPa, Modulus of elasticity of 6316.43 average 6054.68 MPa, and Poisson Ratio of 0.1651 Average 0.1598.

Use of photographic documents for comparative monitoring of the ecology of the region

The water factor has always been the "Achilles' heel" of Uzbekistan. The uneven natural distribution of natural water sources from antiquity to the present day has left its own imprint on the region's economy. The article makes an attempt to reveal the main processes of the influence of the water factor on the ecology of Uzbekistan with the help of visual material based on photographic documents of the National Archives of Uzbekistan, film and photographic documents and modern Internet publications. The article contains only a small part of photographic documents and photographs concerning the water factor of the republic, accumulated over 100 years of photographic documentation in Central Asia.

MODELLING OF MITIGATING DIARRHOEA IN THE WETLAND AREA OF BANYUASIN DISTRICT, INDONESIA: A CROSS-SECTIONAL STUDY

Diarrhoea is one of the causes of high morbidity and mortality rates in developing countries that have poor environmental sanitation, inadequate water supply, high poverty rates and low levels of education. The purpose of this study was to examine diarrhoea control models in toddlers of Banyuasin District wetlands. This study used a cross-sectional study design. The study was conducted in the wetland area of Banyuasin District with a sample of 296 respondents. Data analysis was performed in univariate, bivariate and multivariate. The results showed that there was a correlation between chemical indicators (p-value = 0.035), latrine sanitation (p-value = 0.004), latrine quality (p-value = 0.005), income (p-value = 0.023), and hand washing with soap (p-value = 0.035) with the occurrence of diarrhoea in toddlers of Banyuasin District wetlands area. 51.9% of diarrhoea prevention can be explained by the water factor (19.7%), sanitation factor (15.6%), personal hygiene factor (8.2%), toddler factor (4.8%) and mother factor (3.5%) in this study. Improvements of environmental sanitation related to healthy latrines, rubbish bins, sewerage and clean / drinking water sources, as well as intensive education about personal hygiene and breastfeeding toddlers can contribute in reducing the occurrence of diarrhoea in toddlers.

PENGARUH KOMBINASI AMPAS TEH DAN LERI PADA SIFAT KIMIA ULTISOL TERHADAP PRODUKSI TANAMAN CABAI RAWIT

Chili is a horticultural commodity that has high economic value, one of the leading national vegetable commodities, and has high competitiveness, so its availability must be increased continuously. Production of Cayanne Pepper can be optimized in various ways such as planting fertile and healthy land, can be planting Cayenne Pepper in the home yard, but problems occur when Cayanne Pepper are planted on acid mineral soils such as Ultisol which are known to have low organic matter and nutrients. This study tries to utilize household wasted as tea and leri which is combined and applied to Ultisol so that its effect on the soil and yield of Cayanne Pepper plants can be increased. The design model used in this research is a Completely Randomized Design Factorial consisting of two factors. The first factor is tea wasted (factor T) with 4 levels, as T20 (tea waste 20 g), T40 (tea waste 40 g), T60 (tea waste 60), and T80 (tea waste 80 g). The second factor is the leri water (factor L) with 4 levels, as L50 (leri 50 ml), L100 (leri 100 ml), T150 (leri 150 ml) and L200 (leri 200 ml) so there are 16 combinations of treatments with 3 replications. Observations in the research identification of N-total, P2O5, K2O, total chlorophyll, the weight of fresh fruit, the quantity of fruits, dry weight of plants. The results show that the treatment of the combination of tea wasted and leri water has a positive effect on soil chemical so that it affects the yield of Cayanne Pepper plants.

Enhancing algal biomass production and nutrients removal from municipal wastewater via a novel mini photocavity bioreactor

This study presents the use of a novel photocavity reactor in order to intensify the growth rate, biomass and lipid productivity in microalgae. The reactor offers an aseptic approach for better control on growth rate in microalgae.The Absorption Factor (AF), Attenuation Factor (AtF), Modified Fluence Rate (MFR) and water factor of the photo reactor were recorded to be 1.581, 0.267, 0.347 mW/cm2 and 2.072 respectively. The maximum growth rate recorded was 310 mg L−1 inphotocavity reactor. The results clearly indicate that using the stainless steel visible photoreactor can lead to a significant increase in the growth rate (43.3%), productivity of biomass (27-33%) and lipid content (6-8%) in comparison to microalgae cultivated in glass conical flasks (control). COD, total nitrogen, phosphate and bacterial load (colony-forming unit- CFU) were determined in this study. A decrease in COD (180 to 19 mg/l) and CFU (57×109 to 5×101) of wastewater was also recorded in this study.

The Effect Of Seawater Use On Concrete Mixtures With Variations In Semen Water Factor

The purpose in this study was to know the characteristic properties of fine aggregate materials and rough aggregates derived from Badene Village batauga sub-district as well as to know the strong press produced by concrete against seawater mixture with variations of cement water factor. In this study the material was mixed using laur water and fresh water with variations in cement water factor which is 0.45, 0.50, and 0.55. Testing is carried out at the age of concrete 3 days, 7 days and 28 days, using the dimensions of the slinder test object 15 cm x 30 cm. The total number of test objects is 54 pieces. The stronger the concrete press by using seawater as a concrete mixture can increase the strong press of concrete when compared to fresh water, as well as the smaller the value of the cement water factor used then the greater the strong value of the press. Strong press concrete with seawater mixture using cement water factor 0.55, 0.50, and 0.45 at age 28 days produce strong concrete presses respectively 15.82 MPa, 18.65 MPa, and 20.85 MPa, while strong concrete press with freshwater mixture using cement water factor 0.55, 0.50, and 0.45 at 28 days old produce strong concrete press 15.70 MPa respectively 18.40 MPa and 20.00 MPa. The results showed the influence of seawater use on concrete mixtures can increase the strength of the press compared to the use of concrete mixtures using fresh water.

Pengaruh Fly Ash Terhadap Kuat Tekan dan Porositas Beton Berpori

[ID] Peningkatan penggunaan beton konvensional mengakibatkan lapisan kedap air semakin luas, yang berimbas kepada turunnya muka air tanah dan terjadi banjir pada musim hujan. Hal ini dapat disiasati salah satunya melalui pengaplikasian cara-cara pembangunan yang ramah lingkungan, seperti penggunaan fly ash. Tujuan penelitian kali ini adalah untuk mengetahui presentase fly ash pada campuran beton agar menghasilkan kuat tekan dan porositas optimum. Pada penelitian ini digunakan fly ash sebagai bahan tambahan campuran dengan variasi sebesar 0%, 10%, dan 20% dari berat semen dan variasi faktor air semen (FAS) yang digunakan sebesar 0,3 , 0,4 , 0,5. Agregat kasar berukuran maksimum 20 mm, dengan jumlah sampel 36 buah silinder, 27 buah silinder untuk pengujian kuat tekan dan 9 buah silinder untuk pengujian porositas dilakukan pada usia 28 hari. Mutu beton rencana pada penelitian ini 10 MPa mengacu pada mutu bata beton. Pengujian kuat tekan beton yang dihasilkan menggunakan alat CTM (Compression Testing Machine) dan pengujian porositas menggunakan alat Falling Head Water Permeability Test yang megacu pada ACI 522R-10 yang dimodifikasi. Hasil ekperimen menunjukan nilai optimum kuat tekan dan porositas rata-rata dengan variasi FAS 0,3 : FA 10%, untuk umur beton 28 hari secara berturut-turut adalah 5,4 MPa dan 7,75 m3/s. Kesimpulan penelitian ini adalah komposisi paling optimum untuk penggunaan fly ash yaitu sebesar 10% dengan faktor air semen 0,3. [EN] The increase in the use of conventional concrete resulted in a wider airtight layer, which resulted in the lowering of the groundwater level and flooding during the rainy season. One of the ways to overcome this is through the application of environmentally friendly development methods, such as the use of fly ash. The purpose of this research was to determine the percentage of fly ash ih concrete mixture to produce optimum compressive strength and porosity. In this study, fly ash was used as an additional mixture with variations of 0%, 10%, and 20% of the weight of cement and variations of the cement water factor (FAS) used were 0.3, 0.4, 0.5. The maximum size of coarse aggregate is 20 mm, with a sample size of 36 cylinders, 27 cylinders for compressive strength testing and 9 cylinders for porosity testing carried out at the age of 28 days. The quality of the concrete plan in this study is 10 MPa which refers to the quality of the concrete brick. Testing the compressive strength of the concrete produced using a CTM (Compression Testing Machine) and porosity testing using the Falling Head Water Permeability Test which refers to the ACI 522R-10. The experimental results showed that the optimum compressive strength and average porosity with FAS variation of 0.3: FA 10%, for 28 days of concrete were 5.4 MPa and 7.75 m3

Pemanfaatan Limbah Karbit Sebagai Bahan Tambah Pada Mortar Ditinjau Dari Kuat Tekan

Infrastructure development that occurs causes cement demand to increase each year To reduce cement production, other alternative substitutes are needed, one alternative material that can be utilized is carbide waste. Utilization of carbide waste if added as material needs to be handled first before use. The addition of carbide waste as an ingredient in mixing mortar is expected to give a pozolanic reaction so that it will increase the compressive strength of the mortar. The aim of this research is to prove whether carbide waste as an added material can reach the M type mortar compressive strength based on SNI 6882-2014. This study used an experimental method with a total of 36 cube specimens measuring 50 mm each side, a cement water factor of 0.4, the compressive strength of an M-type plan (17.2 MPa). The specimens consisted of mortars with added carbide waste materials with variations of 0%, 2.5%, 5%, 7.5%, 10%, and 12.5% ​​by weight of cement. The results showed that all variations with the addition of carbide waste can increase the compressive strength to exceed the quality of type M quality (17.2 MPa). Average compressive strength of mortar with the addition of carbide waste variations of 0%, 2.5%, 5%, 7.5%, 10%, and 12.5% ​​of the weight of cement at 28 days respectively as follows are 20, 67 MPa, 23.33 MPa, 22 MPa, 26.67 MPa, 24.33 MPa, 19 MPa. Maximum compressive strength occurs at a variation of 7.5% carbide waste