an 1890 #paper on the “ammoniacal fermentation of urine”, which is what’s happening in urea-based #MICP. Mentions that actually bacilli were “very rarely found”, and mostly “micrococci” are responsible for the production of ammonia from urine.
on 02015-11-03Wired on Peter Trimble’s #MICP project, “Dupe”. Apparently you need 100ℓ of urine per stool.
on 02015-11-03Peter Trimble built a portable #MICP machine called “Dupe” to make stools out of sandstone and urine.
on 02015-11-03an overview of #MICP for seismic soil stabilization and Magnus Larsson’s project.
on 02015-11-03Another paper about “BioGrout” #MICP, this time using urea and calcium chloride and Sporosarcina pasteurii (previously known as #Bacillus-pasteurii.) This #pdf #paper reports results of strength tests.
on 02015-11-03TED talk by Magnus Larsson about #MICP.
on 02015-11-03"MICP"
on 02015-11-03#Bacillus-pasteurii, used in some #MICP systems, is now called Sporosarcina pasteurii.
on 02015-11-03using #MICP with #Bacillus-pasteurii to heal cracks in portland-cement #concrete.
on 02015-11-03a forum thread about Magnus Larsson’s Sahara anti-desertification project on #MICP using urea and #Bacillus-pasteurii.
on 02015-11-03“BioGrout” uses denitrifying bacteria to stabilize soil, producing only nitrogen as a by-product. Explains that Whiffin et al. 2005, Ivanov & Chu 2008, and DeJong et al. 2009 are doing “microbially induced carbonate precipitation (#MICP)” from a solution of urea and calcium chloride, producing ammonia rather than nitrogen, and have to inject their bacteria after growing them in a bioreactor. BioGrout, instead, uses calcium acetate (100 mmol/ℓ) and calcium nitrate (120 mmol/ℓ) over a few months with the existing soil bacteria. #pdf #paper
on 02015-11-03