With the increased awareness on the need to clean-up its rivers, Bulacan’s local government units have tapped UP Los Baños-BIOTECH to help in setting up bioremediation solutions which are less costly and more environment-friendly than conventional chemical treatments.
Dr. Lorele C. Trinidad of BIOTECH, who leads the team developing the bioremediation, reports that the developed prototype can remove and at the same time recover precious heavy metals from water discharged during gold processing and leather tanning.
Gold jewelry-making became a popular household-based livelihood in the province of Bulacan, but jewelry makers use crude equipment and inefficient processing techniques.
Silver, a valuable metal, can be recovered from the chemical solutions being used in gold-smelting. In the process, copper-rich wastewater is produced. The wastewater is usually dumped into Bulacan’s river system. When Dr. Trinidad's team sampled industrial wastewater from various sites of the river system, it found out that the wastewater has 5,000-10,000 ppm of copper, when the limit allowed by the Department of Environment and Natural Resources is only 1.3 ppm.
On the other hand, leather tanning operations in Bulacan use chromium III to treat raw animal hide during tanning. According to Dr. Trinidad, processors use so much chromium III that as much as 50% of the applied chemical ultimately goes to the river.
With fund assistance from the Philippine Council for Industry and Energy Research and Development (PCIERD) and the Department of Science and Technology (DOST), Dr. Trinidad’s team identified 12 isolates of bacteria collected from Marinduque and Bulacan with high capability to reduce sulfates and produce hydrogen sulfide gas. These bacteria were used in the fabrication of a small bioremediation system.
The bioremediation system, built by the Industrial Technology Development Institute –DOST for the project, uses the hydrogen sulfide gas produced by the bacteria to precipitate and recover copper and chromium from wastewater.
Results of optimization studies have shown great potential for the prototype to be upscaled to a working unit for installation in actual operation sites.
Dr. Trinidad and her co-researchers are now designing a bench-scale metal recovery system, estimated to cost around P300,000, for completion by the end of 2009.
100 % Organic Farming in Bhutan – a Realistic Target?
15.06.2018 | Humboldt-Universität zu Berlin
What the size distribution of organisms tells us about the energetic efficiency of a lake
05.06.2018 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
19.06.2018 | Physics and Astronomy
19.06.2018 | Life Sciences
19.06.2018 | Physics and Astronomy