New Mars Forums

Official discussion forum of The Mars Society and MarsNews.com

You are not logged in.

Announcement

Announcement: As a reader of NewMars forum, we have opportunities for you to assist with technical discussions in several initiatives underway. NewMars needs volunteers with appropriate education, skills, talent, motivation and generosity of spirit as a highly valued member. Write to newmarsmember * gmail.com to tell us about your ability's to help contribute to NewMars and become a registered member.

#227 2021-04-22 17:09:58

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,122

Re: Greenhouse - hydroponics vs soil

buckwheat bump

Offline

#228 2021-06-08 12:03:00

RobertDyck
Moderator
From: Winnipeg, Canada
Registered: 2002-08-20
Posts: 6,744
Website

Re: Greenhouse - hydroponics vs soil

Not sure where to post this, so...

Researchers Create Soil Catalyst to Make Farming on Mars a Reality

Now, a team of scientists has developed a bioinspired catalyst that simplifies the perchlorate removal process and destroys 99 percent of the contaminant at ambient temperatures and pressures. The results provide “a water-compatible, efficient, and robust catalyst to degrade and utilize [perchlorate] for water purification and space exploration,” according to a recent study published in the Journal of the American Chemical Society.

The new research builds on past experiments that make use of anaerobic microbes, tiny organisms that live in oxygen-poor environments. Some of these organisms can survive by harvesting oxygen atoms inside perchlorate, which effectively breaks down the pollutant. The microbes can be cultivated to do this work in industrial reactors, but it can take weeks or months to establish working stability in this process.
...
“The motivation for our catalyst is that we just want to finish the work in a single day.”

“Right now, we have made it very stable, and it can survive under very challenging concentrations,” he added. The catalyst can be used to break down perchlorate at concentrations lower than one milligram per liter up to 10 grams per liter, which means it can be used in many contexts, from treating groundwater to detoxifying Martian soil.

To achieve this result, Liu and his colleagues developed a system based on the chemical element molybdenum, a metal that microbes use as part of their enzymatic harvesting of perchlorate. Using a mix of common fertilizer containing molybdenum, a binding molecule called bipyridine, a catalyst called palladium on carbon, and hydrogen gas, the researchers were able to rapidly disintegrate perchlorate in water at room temperature.

Offline

#229 2021-06-08 17:17:09

louis
Member
From: UK
Registered: 2008-03-24
Posts: 6,871

Re: Greenhouse - hydroponics vs soil

Alternative strip off the first metre of regolith and then harvest the layer that has few or no perchlorates. My understanding it is solar radiation that creates the perchlorates so they shouldn't be there in lower layers.


RobertDyck wrote:

Not sure where to post this, so...

Researchers Create Soil Catalyst to Make Farming on Mars a Reality

Now, a team of scientists has developed a bioinspired catalyst that simplifies the perchlorate removal process and destroys 99 percent of the contaminant at ambient temperatures and pressures. The results provide “a water-compatible, efficient, and robust catalyst to degrade and utilize [perchlorate] for water purification and space exploration,” according to a recent study published in the Journal of the American Chemical Society.

The new research builds on past experiments that make use of anaerobic microbes, tiny organisms that live in oxygen-poor environments. Some of these organisms can survive by harvesting oxygen atoms inside perchlorate, which effectively breaks down the pollutant. The microbes can be cultivated to do this work in industrial reactors, but it can take weeks or months to establish working stability in this process.
...
“The motivation for our catalyst is that we just want to finish the work in a single day.”

“Right now, we have made it very stable, and it can survive under very challenging concentrations,” he added. The catalyst can be used to break down perchlorate at concentrations lower than one milligram per liter up to 10 grams per liter, which means it can be used in many contexts, from treating groundwater to detoxifying Martian soil.

To achieve this result, Liu and his colleagues developed a system based on the chemical element molybdenum, a metal that microbes use as part of their enzymatic harvesting of perchlorate. Using a mix of common fertilizer containing molybdenum, a binding molecule called bipyridine, a catalyst called palladium on carbon, and hydrogen gas, the researchers were able to rapidly disintegrate perchlorate in water at room temperature.


Let's Go to Mars...Google on: Fast Track to Mars blogspot.com

Offline

#230 2021-06-08 19:34:05

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,122

Re: Greenhouse - hydroponics vs soil

If we are going to need to remove soils to get at what is less contaminated without an exploratory mission done before man gets there then we are just going to be out of luck....
If we are going with the assumption that we are doing a soil surface greenhouse is going to be more than a problem if we can not get good soils to grow in....

Offline

#231 2021-06-08 22:21:58

RobertDyck
Moderator
From: Winnipeg, Canada
Registered: 2002-08-20
Posts: 6,744
Website

Re: Greenhouse - hydroponics vs soil

Um, could I suggest Mars Direct? Yea, I know, in 2002 I suggested a modification of Mars Direct. I still think my modification is an improvement, but it's strongly based on Mars Direct. The idea is a human mission to Mars. Humans can dig and determine how deep perchlorates can go. I could mention that after Apollo 11, NASA promised a human mission to Mars in 1981. And they made major progress until Nixon killed Apollo. I could also mention that if Mars Direct were approved when pitched in June 1990, we would most likely have had an unmanned test of equipment to Mars in 1997, and humans on the surface of the Red Planet in 1999. We have the ability, we just need the will.

Mars Direct: does not rely on the greenhouse, but includes a greenhouse as a science experiment.

Offline

#232 2021-06-25 04:43:37

Mars_B4_Moon
Member
Registered: 2006-03-23
Posts: 885

Re: Greenhouse - hydroponics vs soil

Scientists grow a salad in Antarctica
https://www.dailymail.co.uk/sciencetech … -soil.html

New Antarctic farm will grow produce
https://inhabitat.com/new-antarctic-far … degrees-f/

Study Looks More Closely at Mars' Underground Water Signals
https://www.marsdaily.com/reports/Study … s_999.html

A new paper finds more radar signals suggesting the presence of subsurface 'lakes,' but many are in areas too cold for water to remain liquid.

In 2018, scientists working with data from ESA's (the European Space Agency's) Mars Express orbiter announced a surprising discovery: Signals from a radar instrument reflected off the Red Planet's south pole appeared to reveal a liquid subsurface lake. Several more such reflections have been announced since then.

In a new paper published in the journal Geophysical Research Letters, two scientists at NASA's Jet Propulsion Laboratory in Southern California describe finding dozens of similar radar reflections around the south pole after analyzing a broader set of Mars Express data, but many are in areas that should be too cold for water to remain liquid.

Offline

#233 2021-06-25 19:58:19

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,122

Re: Greenhouse - hydroponics vs soil

We have seen the Antarctica Conex box but its not practical in that is not producing volume of foods for use its more experimental...

Offline

#234 2021-06-25 20:08:18

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,347

Re: Greenhouse - hydroponics vs soil

For SpaceNut re #233

The link provided by Mars_B4_Moon appears to be about something not yet installed.

The claim appears to be that this is not experimental.

Can you provide a link to the Conex box you are remembering?

What nation was involved in developing it?

FluxBB failed to deliver posts containing the word "conex" ... it found all sorts of posts that seemed to have nothing to do with food.

(th)

Online

#235 2021-06-25 20:48:42

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,122

Re: Greenhouse - hydroponics vs soil

The story on this starts back in 2014 or possibly earlier https://www.fastcompany.com/3029440/in- … es-on-mars

edengreenhouse_DSRviaFlickr.jpg?resize=640%2C361&ssl=1


more recent articles
https://www.space.com/mars-lunar-greenh … ca-harvest


q45wi85BBnkqqJxycAPEwX-970-80.jpg.webp

430 to 540 square feet (40 to 50 square meters) per crew member,

https://www.academia.edu/11762210/_Desi … ic_station

for the moon or mars eden project
https://www.dlr.de/content/en/articles/ … sults.html

greenhouse-concept-for-the-moon-and-mars.jpg?__blob=normal&v=7__ifc1920w

Offline

Board footer

Powered by FluxBB