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#manure

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Alexander J. Stein

(5/6) It's the way that #dairy operations store #manure that produces the potent greenhouse gas—despite other, low-methane storage methods. #Biodigesters aren't removing greenhouse gas from the air, they generate #methane they didn't need to generate & then trap it: vox.com/future-perfect/392881/

Vox · Big Oil and Big Ag are teaming up to turn cow poop into energy — and profits. The math doesn’t add up.By Kenny Torrella
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Alexander J. Stein

(4/x) Expanding #dairy herd sizes is at odds with the consensus among #climate scientists who warn that rich countries must drastically reduce #livestock populations (particularly #cattle) to meet #globalwarming targets. And cow #manure on its own doesn't contain methane: vox.com/future-perfect/392881/

Vox · Big Oil and Big Ag are teaming up to turn cow poop into energy — and profits. The math doesn’t add up.By Kenny Torrella
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Public
Alexander J. Stein

(2/x) Large #dairy operations managed to turn costly #manure into money—with biodigesters: Bacteria break down manure & generate #methane, biodigesters trap it to produce #biogas. Public money & assistance are used to support & develop #biodigester infrastructure: vox.com/future-perfect/392881/

Vox · Big Oil and Big Ag are teaming up to turn cow poop into energy — and profits. The math doesn’t add up.By Kenny Torrella
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DoomsdaysCW

Interesting article... So, ammonia found in humanure inhibits methane production. However, the addition of chicken feathers seems to be a workaround! I did not know that!

@BrambleBearGrrrauwling @Spr1g

How #biogas from human waste will lead to energy independence

Chicken feathers enhance the quality of biogas produced from human waste, allowing impoverished communities to generate their own power.

by Victoria Corless | Apr 14, 2022

"Accessible and affordable biogas

The solution they propose centers around the production of biogas, conventional sources of which include #FoodScraps, #wastewater, and animal #manure. But human waste could provide a viable, renewable source of energy, especially in regions of the world where energy supplies are unstable.

"'The shift into animal waste such as poultry droppings and cattle dung has huge prospects, but it is not sustainable in the long term as rural farmers depend on it,' said the researchers. 'The use of human excreta is the most available and sustainable due to the human population.'

"One challenge, however, is the ammonia naturally found in human waste, which inhibits the growth of #methane-producing bacteria and results in impure biogas with high levels of nitrogen. Chemical and microbial pretreatments are an option, but the team wanted to develop a truly sustainable and accessible solution to meet energy demands in impoverished regions.

"The trick, according to the study published recently in Global Challenges, is to combine the waste with powdered chicken feathers. The feathers are themselves useful in generating biogas, but only when pretreated to make them amenable to anaerobic digestion. Instead of adding an additional treatment step, the scientists let the microbes found naturally in human waste do all the work for them.

"In a laboratory-scale biodigestor, the team mixed together powdered chicken feathers and human waste in a 1:5 ratio and allowed the solution to incubate, measuring the quantity and quality of biogas produced over roughly two months. Compared to controls that contained no powdered chicken feathers, the biogas produced when the feathers were co-digested with the human waste contained, at minimum, 68% less nitrogen and 73% more methane.

“This experimentation means that there could be minimum nitrogen content with more microbes in the human excreta acting on the chicken feather as biotreatment,” said the authors. “The extensive effect of the microbes can be seen in the improved carbon dioxide and carbon monoxide content [of the biogas].'"

advancedsciencenews.com/how-bi

Advanced Science News · How biogas from human waste will lead to energy independence - Advanced Science NewsChicken feathers enhance the quality of biogas produced from human waste, allowing impoverished communities to generate their own power.
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Alexander J. Stein

(6/x) #Livestock production is responsible for a big share of greenhouse gases (14-15% of global emissions), stemming from #landuse, #methane, #manure, growing of animal feed, and #emissions from processing, transporting, packaging & refrigeration... drawdown.org/insights/greenwas #meat

Project DrawdownGreenwashing and denial won’t solve beef’s enormous climate problemsI’ll admit it: I like beef. Like many Americans, I was brought up to believe that beef was a central part of a traditional family meal. My mom made it. My kids ate it. Marketing campaigns told me it was healthy. Everywhere I went, I saw Americans eating lots of it. And for many years, I didn’t question these choices.
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Alexander J. Stein

(3/x) In feedlots, #cattle are kept in cramped spaces, fed grain (#corn) & forage (alfalfa, #maize silage) while given #antibiotics & growth hormones. Nearby communities have to contend with #manure spills, water & air #pollution, and noxious odors... drawdown.org/insights/greenwas

Project DrawdownGreenwashing and denial won’t solve beef’s enormous climate problemsI’ll admit it: I like beef. Like many Americans, I was brought up to believe that beef was a central part of a traditional family meal. My mom made it. My kids ate it. Marketing campaigns told me it was healthy. Everywhere I went, I saw Americans eating lots of it. And for many years, I didn’t question these choices.
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Alexander J. Stein

(2/3) … to enable efficient #landuse & use of #biomass, to produce #manure for crop cultivation, and to improve the #sustainability of cropping systems by including perennial #forage crops—are invalid or their validity is limited to certain circumstances: doi.org/10.1007/s41055-024-001

SpringerLinkAre Animals Needed for Food Supply, Efficient Resource Use, and Sustainable Cropping Systems? An Argumentation Analysis Regarding Livestock Farming - Food EthicsIt has been argued that livestock farming is necessary to feed a growing population, that it enables efficient use of land and biomass that would otherwise be lost from the food system, that it produces manure that is necessary for crop cultivation, and helps improve the sustainability of cropping systems by inclusion of perennial forage crops in otherwise low-diversity crop rotations. In this paper, we analyze these arguments in favor of livestock farming. Through argumentation analysis based on scientific data, we show that the arguments are either invalid or that their validity is limited to certain circumstances. Without taking into consideration any other potential arguments for livestock farming, or arguments against it, we conclude that the arguments analyzed here cannot in isolation provide justification for more than a small proportion of today’s livestock farming.
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