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Showing posts with label waste. Show all posts
Showing posts with label waste. Show all posts

Tuesday, 11 December 2018

Biochar from food waste

I have a few Qs here...
  • where does food waste best fit in a waste hierarchy? does it have better utility as animal feed or in a localised BSF industry
  • what sort of H&MB numbers are going to work at scale, with all that water to remove? is hydrothermal carbonisation a better path for this type of waste stream
  • recovering P from our industrial food and sewage systems is important... is biochar production going to become a key player?

Properties of Biochar from Anaerobically Digested Food Waste and Its Potential Use in Phosphorus Recovery and Soil Amendment

1School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
2Shanghai Liming Resources Reuse Co. Ltd., Shanghai 201209, China
*Author to whom correspondence should be addressed.
Received: 14 November 2018 / Accepted: 5 December 2018 / Published: 10 December 2018

Abstract

The disposal of a large amount of biogas residue from anaerobically digested food waste is a burden for biogas production. The aim of this work was to investigate biogas residue as a potential feedstock, by preparing biochar at a broad pyrolysis temperature range of 400–900 °C. The properties required for phosphorus recovery and soil amendment application were evaluated. Biogas residue collected from an urban food waste treatment plant was pyrolyzed in a laboratory scale reactor. It was found that by increasing the pyrolysis temperature, the yield of biochar decreased and the pH, electrical conductivity and Brunauer–Emmett–Teller surface area increased. The amount of phosphorus adsorbed onto the biogas residue-derived biochar (BRB) at 900 °C was larger than that of other kinds of biochar. The kinetics of phosphorus (P) adsorption on BRB could be described by the pseudo-second-order equation. The pot experiments showed that the resulting biochar is beneficial for the growth of cabbage. Overall, turning solid residue from the anaerobic digestion of food waste for biogas production into biochar shows good prospects as a means of solving the disposal problem, while creating new markets for food waste biogas residue.

Saturday, 3 March 2018

Biochar & waste management project - Malacca, Malaysia

Prof. Robert Bachmann from UniKL MICET has kindly shared news on the announcement of a new collaborative project with their local council:





Monday, 7 August 2017

Gasifier lab trials at NUS, Singapore

Co-gasification of woody biomass and chicken manure: syngas production, biochar reutilization, and cost-benefit analysis

Abstract

The management and disposal of livestock manure has become one of the top environmental issues at a global scale in line with the tremendous growth of poultry industry over the past decades. In this work, a potential alternative method for the disposal of chicken manure from Singapore local hen layer farms was studied. Gasification was proposed as the green technology to convert chicken manure into clean energy. Through gasification experiments in a 10 kW fixed bed downdraft gasifier, it was found that chicken manure was indeed a compatible feedstock for gasification in the presence of wood waste. The co-gasification of 30 wt% chicken manure and 70 wt% wood waste produced syngas of comparable quality to that of gasification of pure wood waste, with a syngas lower heating value (LHV) of 5.23 MJ/Nm3 and 4.68 MJ/Nm3, respectively. Furthermore, the capability of the gasification derived biochar in the removal of an emerging contaminant (artificial sweetener such as Acesulfame, Saccharin and Cyclamate) via adsorption was also conducted in the second part of this study. The results showed that the biochar was effective in the removal of the contaminant and the mechanism of adsorption of artificial sweetener by biochar was postulated to be likely via electrostatic interaction as well as specific interaction. Finally, we conducted a cost-benefit analysis for the deployment of a gasification system in a hen layer farm using a Monte Carlo simulation model.

Wednesday, 19 April 2017

IBI Webinar: Sewage sludge & Biochar, 26Apr




Reminder! One Week from Today.
New this month: one of our IBI members has put together an 11 page summary of recent sewage sludge and biochar peer reviewed academic research.  This packet will be available only to IBI members and those that register for this webinar!
International Biochar Initiative - Educational Webinar Series
 Sewage Sludge & Biochar
April 26, 2017 • 1:00- 2:30pm ET (United States)
As the world's population continues to increase, our need to find sustainable methods of managing human waste becomes increasingly more important.  Carbonizing waste through pyrolysis or gasification offers some significant advantages over other common waste management practices including substantial reductions in the overall volume of waste, nutrient recovery, renewable energy production, reducing GHG emissions related to wastewater management, immobilization of toxins, to name a few.
Dr. Saran Sohi, an academic from the University of Edinburgh, will provide an overview of scientific research being conducted on the topic of biochar derived from sewage sludge, including the potential for recovery and re-use of Phosphorus.
Jeff Hallowell, CEO of Biomass Controls, has been collaborating with the Gates Foundation for several years where their technology is being used to carbonize human sewage in India.  Jeff will share an overview of the project including lessons learned, challenges and the vast opportunities, especially for remote communities, to convert human waste into biochar.
This webinar will be of interest to wastewater treatment managers both in the developed and developing world, biochar producers, researchers, climate researchers and more.  An interactive Q&A period will follow at the end of the Webinar.  Questions may be submitted during the event or prior to it via email: webinars@biochar-international.org

Cost?
Free to IBI Members or $40 for non-members
To Register:
Registration includes access to the slides and a recording of the webinar.
IBI Members register here (go to the upcoming webinars section). Your event link will be emailed to you after successful confirmation about your membership status.
Non-IBI members register here.
Presenters:

Dr. Saran Sohi
Dr. Sohi leads the soil science dimension of the UK Biochar Research Center (UKBRC) which was launched in 2009. 
The Centre is based in the University of Edinburgh, within the School of GeoScience and emerging out of the Scottish Centre for Carbon Storage.

Collectively the UKBRC addresses biochar production technologies, the function of biochar in soil, potential carbon-equivalent gains from pyrolysis-biochar systems, and scoping socio-economic opportunities and issues (including regulation and land-use).


HallowellJeff Hallowell
Jeff has over 30 years of experience in the computer technology industry with companies such as Xerox, Oracle, Netscape and United Healthcare.  As the former President of ClearStak for five years, Jeff worked on pollution reduction and improving efficiency on hydronic and forced air heats, wood boilers, pellet burners, biochar kilns and wood stoves.  His experience includes the development and modification of automatic controls for each biomass system including Biomass Controls' patented Pollution Control Device and Intelligent Biofuel Controller.  Currently Jeff is working on several projects including rolling out human excreta-to-biochar processing systems that provide a suitable sanitation option to meet the needs of the urban poor as part of the Reinvent the Toilet Challenge with the Bill and Melinda Gates Foundaiton.  He was also the Project Manager for the Relocate, LLC project to process human solid waste to biochar in the arctic climate of Kivalina, Alaska.

 
Moderator:  Kathleen Draper
Kathleen is a member of the IBI Board and Chair of IBI's Information Hub. She is also the US Director of the Ithaka Institute for Carbon Intelligence. The Institute is an open source network focusing on beneficial carbon sequestration strategies which simultaneously provide economic development opportunities both in the developed and developing world. She is an editor and writer for The Biochar Journal, sponsored by the Ithaka Institute. Kathleen also works with various different universities and individuals on projects that are investigating the use of biochar in cement and other building and packaging products to develop products with lower embodied carbon which can be made from locally available organic waste. She has written extensively about various topics related to biochar and is a co-author of the book "Terra Preta: How the World's Most Fertile Soil Can Help Reverse Climate Change and Reduce World Hunger".

For more information:
What questions do you have about biochar quality and use? Please send your questions by April 23rd to webinars@biochar-international.org. For more information or if you have any questions about registration please email Vera Medici at vmedici@ttcorp.com.
Want to become an IBI member?  Visit our membership page to help support IBI.

Monday, 28 November 2016

Farmers learn to make ‘biochar’ ‘tech

"TO reduce the trash generated by Cebu City daily, around 100 farmers and leaders were trained by the City Government and the Department of Environment and Natural Resources (DENR) 7 recently on biochar technology."

http://www.sunstar.com.ph/cebu/local-news/2016/11/27/farmers-learn-make-biochar-tech-511863