Case Study of Selected Nature Swimming Pools in the South Moravian Region

Nature swimming pools are a sought-after alternative to conventional swimming pools. Their natural water purification system, without the need for chemicals, is beneficial to health and environmentally friendly. Designing such a nature swimming pool is a complex matter because it requires coordination of a number of effects, which can easily cause an imbalance in the entire system. This work uses the case study method to analyse the overall condition of three nature swimming pools in the South Moravian Region during the second half of the swimming pool operation season.

A Field Study for Sustainable Community Empowerment through Appropriate Technology of Water Purification and the Concept of Feces Standard Money in Hatphain Village, Lao PDR

The application of appropriate technologies in a developing country is an opportunity to introduce green technology which may lead people to imagine a better life. This point is at the intersection of appropriate technology and sustainable development. This research focuses on Hatphain village where there is no clean water, sewage system, or power lines. Two environmental technologies (an unpowered water purification system, Ongdalsaem and an eco-toilet system, BeeVi toilet) were introduced, based on the concepts of the environmental self- sustainable village and feces Standard Money (fSM). We found that the Ongdalsaem was effective in reducing the concentration of nitrogen and lead in the water in Hatphain. The BeeVi water-free toilet was installed, allowing urine and feces to be separated and used as compost. We strived to spread ideas of sustainability using new eco-circulation experiences and encouraging learning about environmental technology through practical and playing facilities that residents managed themselves.

Constructing Solar Water Purifier

In India, water borne diseases are increasing day by day. Nearly, 60% of India’s population has to drink unsafe or impure drinking water. Drinking impure water gives rise to many water borne diseases such as diarrhea, typhoid, etc. Energy crisis is another big issue in our country as India is a developing country. Conventional energy sources are limited and they cause environmental pollution. By using a renewable energy source such as solar power for water purification, we can avoid above mentioned issues as it gives solution to both the problems. Solar water purifiers comes up with a solution to these problem as water gets purified with the help of solar energy. Solar water purifiers are an advancement of the current water purification system. Design methodology of the solar water purifier is presented in this paper. Solar water purifier takes solar power as the input and uses it as a energy source and stores it into the battery. Main components of the proposed solar water purifier are solar panel, battery, heating coil, filtering mechanism, double layer condenser and several water vessels. This purifier uses a filtering mechanism to remove dirt from the impure water and a boiling mechanism to kill organisms present in it. Through this process, pure drinking water is achieved.

Characteristics and Performance of Polysulfone-Polyvinylpyrrolidone Synthetic Hybrid Membrane in Water Purification System

Clean water is a fundamental need for human. Whether it is used for recreational purposes, food production, domestic use and drinking, safe and readily available water is important for everyone. Water scarcity is very serious and is one of the most extensive problems affecting people throughout the world. In this study, the emphasis is to fabricate polysulfone-polyvinylpyrrolidone hybrid membrane with different polymer formulation to study the characteristics and morphology in determining the optimum formulation of polysulfone-polyvinylpyrrolidone hybrid membrane. In this study, polysulfone and polyvinylpyrrolidone were used as the polymers and 1-Methyl-2-Pyrrolidone was used as the solvent. The optimum formulation is obtained by conducting the test on the membrane; permeate flux test, salt rejection test and tensile test. The resulted optimum polysulfone-polyvinylpyrrolidone hybrid membrane were undergone two more tests which were Scanning Electron Microscopy (SEM) and wastewater quality test. These two tests were conducted to measure its ability to filter the wastewater and the pore size of membrane were captured. The optimum Membrane is sample4 which had the highest value of permeate flux with 33.78 L/m2hr, it had removal percentage of 11.76% for salt rejection, decreased 12.42% in conductivity from 3.3 S/m to 2.89 S/m, and it was able to withstand 48 kN/m2 at strain value of 3.6 m/m. The optimum sample 4 has formed a microfiltration membrane with average 3.23 μm pore size which is successfully filter out particles in the wastewater, where it could remove 44.27% turbidity, 23.08% TSS, 14.29% COD, 4.73% TDS, 4.79% conductivity, 4.34% pH and 13.04% colour.