Takashi Ano is a professor of Kindai University. He lives in Osaka, Japan. His bachelor, master and doctor degrees were awarded from Osaka University. His major fields are biocontrol agents, and microbial fuel cell aimed for the sustainable society, and has published many papers in the field (https://researchmap.jp/read0008399/?lang=english). He had worked in Tokyo Institute of Technology for 20 years as a research associate, and an associate professor.
World population is now increasing, and the United Nations predicts that the world population will be 9.8 billion by 2050. The major concern is that this population increase will lead to food and energy shortages. A microbial fuel cell (MFC) is a device that produces electric power by recovering electrons generated on an electrode when microorganisms with electrochemical activity decompose an organic substances. MFCs can simultaneously perform wastewater treatment and electricity production, by using organic substance in wastewater as a nutrient source for microorganisms. To increase agricultural productivity, utilization of pesticides are necessary to solve the food shortage. In recent years, biocontrol agents are attracting attention, because of the smaller burden on the environment compared with chemical pesticides. We tried to produce electricity and antibiotics at the same time using the MFC by Bacillus subtilis RB14, an antifungal substance iturin A producer. As a result, it was recognized that electricity production after the 10th day of the cultivation and an antifungal activity of the culture supernatant from the MFC against Rhizoctonia solani K1. It seems to be the first finding that the electricity generation and the production of antifungal substance by B. subtilis in the MFC, and it is expected that the production of a biocontrol agent from the waste material and also the generation of electricity during the process in the same apparatus. This may open a new method for the waste material treatment and the low cost production of biocontrol agents with recovery of energy as electricity.
Amelia Zielinska has done research for PhD at Wroclaw University of Science and Technology. She is the director of Laboratory of Chemical Examination of Water. Her research interests focus on thermal e-waste treatment and hazardous waste recycling.
Chemical lithium-ion (Li-ion) energy sources dominate the market for second-class batteries (accumulators), almost all mobile phones and portable computers are powered by lithium cells. In addition, a new branch of the industry that generates demand for Li-ion batteries is the growing market for electric and hybrid cars. Lithium-ion batteries contain a number of valuable metals, such as Co, Li, Cu and Al. Cobalt is one of the less frequent metals in the Earth's crust, hence its market value is high - 80,490 $ / MT, and profitable recovery. Lithium recovery will be important in the perspective of the development of electric car production - the current price of 16 500 $ / MT. Mass production of vehicles powered by Li-ion batteries will increase the demand for lithium, so its price will increase and the recovery will be profitable. Another argument in favor of recycling batteries is the need to protect the environment against heavy metal pollution or complex organic substances in their composition. The presented work presents the results of tests for the recovery of Co, Li, Cu and Al metals by chemical metallurgy using a mixture of formic acid, glutaric acid and perhydrol as leaching agents and sodium hydroxide as a precipitating agent. The conducted research led to the recovery of metals at a level above 85%.