Glenn Herbert wrote:Very cool looking, but I am concerned about its structural integrity. It gets 100% of its strength from the end walls, and depends on the lateral stiffness of the long facets to keep from collapsing in the middle. I think the original building the concept came from supports the roof facets at many internal points, so that it does not need to span much aside from the overhanging end.
If the greenhouse profile is a catenary arch, it would not have internal stresses, but a snow load would change that; you can't have it be stable both with and without snow. The vertical back wall would need to be braced to the ground to support the thrust if it does use any arch design.
Glenn, good point and I have thought about it for quite a while. I plan to solve it two ways. (1) Use two batches of long and continued PVC tubes from end to end in two directions with holes drilled to accommodate the sectioned pieces in the remaining direction. (2) Build internal supports inside as I need some internal structure to hang my vertical grow towers anyway.
Don, good to see you here. Just one thing to point out and help you... You seem to use the Attachments option to post images and you have mentioned your concern of not being able to post images within the text.
In fact, you can. Well, not with wrapping text but at least we are able to insert an image between paragraphs. For example, I am inserting this picture right below, using this format [ img ]https://airliftdripgrow.com/wp-content/uploads/2019/01/aquaponics.jpg[ /img ] according to what is suggested by the forum (I have to add spaces after [ and before ] to show the BB code):
You can post the image URL right into the editor and highlight it and then click the Img button above the editor to wrap around the URL with [ img ] and [ /img ] (again I have to add spaces after [ and before ] to show the BB code). Or you could copy the image URL and then cilck the Img button to paste the URL at prompt popup area.
However, the above methods assume that you have a place to upload your photos and get the URLs of those photos. I am testing now if I can get the URL of this image after uploading as an attachment.
Has anyone tried using airlift pumps? I am a fan of AIRLIFT PUMPS. Now I am using them to move water up and around wherever I can, best for aquaponics or hydroponics, as living things need both air and water at the same time. And I prefer to moving water slowly with low pressure (i.e. DripGrow) rather than fast with high pressure (traditional irrigation). That is why I set up a website called AirliftDripGrow.com (Chinese) and DripGrowTower.com (English).
I came up with an automatic way to grow microgreens using regular nursery grow trays. Check it out... As for the seeds, I just used several mixed seed packages that came along with the microgreens machine I bought before I assembled my own system. Our family like Cashew a lot.
Walt Chase wrote:Been to Chena Hot Springs before. Located NE of Fairbanks AK. One of the colder parts of the state in winter. They generate 100% of their energy needs along with a geothermal heated greenhouse. We toured the power plant and GH the last time we were there. It is a resort, but the owner is big into alternative energy and renewable s. Here is a link to their renewabl energy part of the website. https://chenahotsprings.com/renewables/
Good. But they have Hot Springs to use, which is not applicable for most of us. I believe that we could achieve NetZero without using hot springs water. Passive solar, solar waterfalls, geo-air, compost heat plus a few solar voltaic panels - Integration of all that are applicable.
Jim Guinn wrote:Here's another one (I think this was posted in another thread). Winter temperatures in Alliance, Nebraska can drop to -20°F (the record low is -40°F/C), but retired mailman Russ Finch grows oranges in his backyard greenhouse without paying for heat. Instead, he draws on the earth's stable temperature (around 52 degrees in his region) to grow warm weather produce- citrus, figs, pomegranates - in the snow.
This is the one and there is a better design if you dig further.
Merry Smith wrote:I have updated my OS from Windows 8 to Windows 10. After updating it My laptop get very slow and it gets hang again and again. I want to Fix Windows 10 Automatic Repair. Can anyone help me?
I suggest that you install Linux Mint side by side with your Windows install. This way you can use both systems. I have switched over to Linux Mint since 1998. Learn more from experience here.
As microgreens are easy to grow and suitable for the winter season, I worked on this for two weeks and came up with a way to automatically pump water to feed my microgreens using airlift pumps. Better still, I built two bucket filters in order to reuse the water. Here is the YouTube reporting this:
I used two Rona buckets and drilled a hole on the side close to the bottom for each bucket so that a shutoff valve could be installed like this:
Then I added enough water to each bucket to make sure there was no leakage whatsoever:
Then each bucket was filled with these things in this sequence: pebble stones/gravels, perlite, crushed coral, and sand.
Another consideration is feeding water from the bottom of the tray containing seeds already sprouted and having leaves - trays on other levels contain seeds that do not have leaves yet:
Here is a closer look at the top tray:
Note that the tiny whitish things around the roots are root hairs, not mold. Root hairs are useful in helping microgreens to absorb moisture even in the air.
OK, I post now more pictures showing how my DripGrow towers are doing. Note that during the testing for about two months, I had used several ways to construct the towers, but the water feeding system is the same, using low power airlift pumps.
This first pic shows two systems using five towers: one system is an aquaponic system (blue is the fish tank) with four towers - one tower is blocked in this first pic so I will post several pics, and one is a hydroponic system with the bamboo tower and two rectangular plastic containers:
Note that the two towers built with double wyes were the hardest to get water onto the grow zones. I had to use sponges and rockwool to stuff the inside right above the grow zones, and for the four grow zones on the top I used four tubes to directly feed water there. The two downspout towers and one bamboo tower, however, are doing well in getting the dripping water, whether using net cups or rockwool cubes directly. As I said earlier, as long as the water is dripping onto one another, everything is wet and fine.
Note that I am NOT using the two newest towers in the first post because I do not have enough air outlets right now as I am switching to test the use of DripGrow in growing microgreens (will post as a separate topic).
As you can see in the following pic, I am using one air outlet split into two to feed air (using airstones) into two fish tanks I have (one fish tank is part of the Aqualibrium kit someone gave me), one outlet for the hydroponic airlift pump, two outlets for the aquaponic system (one to move water from fish tank to hydroton filter bucket and one to lift water all the way to the top and then split into four to feed water for the four towers with the system).
Chris Kott wrote:Wow, Aubrey. That looks amazing! I would love to see your systems growing food, and how the root zones adapt to your system. Are there sprayers for each root zone, or how do you manage to get nutrient solution to each grow basket thing?
Chris, I am using it for my small and compact aquaponics. I can post more pictures later on. No, you do not need sprayers as this is the DripGrow method. As long as each net cup is dripping water onto each other, everything is fine. Watch my video again as I have clearly shown this point.
I came up this system after learning what others are doing. As far as I know, no one is doing exactly what I am working at. So I would like to report shortly what I do. For those who prefer to watching the video, here is the YouTube video I made:
Basically I used a T connector to make a low power airlift pump which can lift water to vertical grow towers up to 7 feet high - could be higher. Here is a picture showing the simplicity of the T airlift pump:
I then placed the airlift pump and associated tubing inside a gutter drain downspout. Holes are drilled on the downspout to hold grow net cups. Then I inserted this downspout into a plastic container which was really a Christmas gift wrap container I got from Canadian Tire right after the Boxing Day. The finished setup is this (the black tubing is the only part sticking out which acts as the air inlet):
I like the vertical grow towers because it is perfect to use the DripGrow method for slow drip feeding and it has eliminated all the plumbing problems associated with water-filled system powered by water pumps.
Using airlift pumps can also supply both the water and air at the same time (a must for aquaponics especially), which works even if the grow system is almost entirely enclosed to prevent water evaporation.
Here is another shot showing a second tower placed inside a shallower container with snap-on cover, side by side along with the first tower: