Vermicompost an Alternative in the Treatment of Organic Solid Waste, in Zones Altoandinas, Tarma, Junin 2019

In the present investigation, the weight, growth, adaptability and production of humus of a calf foot of Californian red worm (Eisenia foetida) fed with compost (made from animal excreta and organic waste) and organic remains were evaluated. The evaluation was carried out in Tarma, Junín Region. A breeding ground was built with 3.2 m3 cement bricks (6.10 m long  1.05 m wide and 0.50 m high); with a 5 cm thick screed with a 2” PVC drain pipe with a west-east slope, raised by the west side at 15°. A population of 10,000 individuals (10 kilograms) was sown, a sample of 370 individuals was extracted by applying a Simple Random Sampling (MAS) whose average weight and length was 0.3 g and 30 mm. they were fed for 3 months (90 days), the calf was divided into 21 sampling points from which 383 worms were weighed and measured whose average weight and length were 0.38 g and 33.24 mm (3.32 cm). Data were taken every day at 2:00 pm, hydrogen potential (pH) and humidity (soil peach meter), substrate temperature (digital thermometer), ambient temperature (thermohygrometer) were recorded. The average weight of the worms varied from 0.30-0.38 g, the average length varied from 30-33.24 mm. The presence of tiny heels and worms demonstrated their adaptability. The production of humus was 3 tons, the efficiency of the breeding stock was 93.75%. The final substrate had an average of 6.72 pH, 13.61°C temperature, 69.86% humidity and 19.5°C ambient temperature. Consequently, vermicompost is an alternative in the treatment of organic solid waste to be developed in high Andean areas.

Effect of Stone Ash Mixture and Coconut Fiber on Concreate Compressive Strenght

The composition of the concrete mixture determines the compressive strength. Concrete mixtures generally consist of cement, water, coarse aggregates, fine aggregates, and concrete drugs. In this study, it will be tried to mix stone ash and coconut fibers. The purpose of this study is to find out the concrete compressive strength with add stone ash and coconut fibers to normal concrete. Data was collected through laboratory tests by carrying out an additional mixture of stone ash and coconut fibers. There were six types of specimens produced which were measured for 7, 14, 21, and 28 days. Variation of specimens 1) normal concrete, 2) normal concrete + stone ash, 3) normal concrete + coconut fiber (1.5%), 4) normal concrete + stone ash and coconut fiber (1.5%), 5) normal concrete + stone ash and 1% coconut fiber, 6) normal concrete + 1% coconut fiber. From the results of testing the concrete compressive strength was obtained 455 kg/cm2 for the age of concrete for 28 days with a mixture of normal concrete + stone ash.

Smart Grid Implementation in Mozambique: Where to Start?

The article presents a survey on the development of Smart Grids in the world. Its purpose is to present an overview of the possibilities and initial challenges to be overcome for its implementation in Mozambique. For the development of this article, a bibliographical survey of the world panorama of technology was made. As a result of this literary survey, it was understood that the concept of smart grids became more clear from 2005 and is developing. Some countries, mainly developed, have already joined the technology and they are with the pilot projects and realized. The motivations for its implementation vary from country to country. Increasing profits in the electricity sector, reducing energy technical losses, improving the environment and enhancing renewable energy are the main motivations. This technology brings benefits associated with technological innovation, new product development and new market opportunities. At the moment, it’s understood that, Mozambique is not in time to implement this technology effectively. Not only because many countries are still with pilot projects, but also, the financial costs for their implementationarehigh. However, although there are presumed difficulties for its implementation, it’s considered convenient to start with the discussions about smart grids in higher education and research institutions, fund mobilization and implementation of testing laboratories. Additionally, it is important to study the possibility of phased implementation of this technology in new condominiums or residential neighborhoods and to gain experience in countries that have already started to implement it.