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Biochar as compost deodorizer: vermicomposting experiment report

12/23/2017

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One of the issues that prevents people from composting (indoors and outdoors) is smelly compost in the collection container in the kitchen. I think this is more likely to be a problem for smaller families (we fill our container too fast for it to get very smelly before we have to empty it!) and probably more likely to be a warm season issue.

If you find this is an issue, I have a solution— biochar. At the Common Ground Fair this year, Todd from Char-Cola (www.char-cola.com) came to my booth to ask whether I had used biochar in my compost collection container. I told him that I had not, he offered me a 1 quart sample to try. I did some reading to ensure that using biochar in my worm bins would harm my worms. Not surprisingly, it doesn’t.

Time for a vermicomposting experiment! A few weeks after the fair, I tried about a quarter cup of biochar on top of our compost collection container and then let it sit covered in the basement to get ripe and simulate what some families might experience. I was surprised that it didn’t smell too bad (rotting potato peels and onion pieces can smell pretty bad). I added the food waste with the biochar to a corner of my bin and marked the corner. Whenever adding something new to your worm bin always add in the corners. Over the next month, I observed that bin as I added food waste to that bin with biochar. During a vermicomposting experiment, I monitor that bin and check the corners. If the worms don’t like what was added they will move away. Adding the biochar to the food didn’t cause the worms to move away and when I peeked in that corner the smell was not too bad. I then monitored that bin for 2 months and everything is fine. I have not tried biochar in my outdoor composting bin, but I cannot imagine that there would be any problems.

I would recommend biochar for those families who have concerns about keeping a compost collection container in their kitchen.

​Cheers!
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Worm compost tea vs. worm bin drainage

9/9/2016

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If you're reading my blog, then you probably know that worm compost tea is great for your plants. I want to make a distinction though: worm compost tea vs. worm bin drainage.

In my mind, worm compost tea is distinctly different from the liquid that drains from some bin designs (what I call worm bin drainage).

Worm compost tea is made by separating the vermicompost from the worms and steeping the worm compost in water to make a tea. My website has complete instructions for brewing up your own worm tea: 1# of vermicompost in a 5 gallon bucket of water.

I don't mean to say that the drainage from a worm bin would be bad for plants. From what I have read it is great fertilizer; however, I'd be concerned about putting it on edible veggies because you do not know what is in it. I have also found a variety of different reports on how to use it ranging from straight (undiluted) to diluted to the color of straw. If I were to use this on salad and other greens I probably diluting it to straw color and bubbling air through it for 12-24 hours using an aquarium bubbler.

If anyone has experience using worm bin drainage, I'd love to hear how you prepare it for use.

Cheers,
Mark

Originally published on October 8, 2009
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Retreating snow uncovers presents from neighborhood dogs

9/9/2016

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It never fails. With the retreating snow, frozen dog poo is revealed in my yard near the sidewalk. You'll find this also at the beach. I understand this is not always controllable and forgive the owners who forgot to bring a bag. I don't have a dog, but I sympathize with owners who have to clear the yard in the spring. The typical dog produces more than 200 pounds of waste each year, according to the USDA's Natural Resources Conservation Service.

What to do with it?

There is a solution, and I don't mean entombing the poo in a plastic shopping bag. Of course, the solution involves worms!

When it comes time to pick up after your pet, plastic shopping bags are bad options. If you choose plastic, you are wrapping something that degrades quickly in something that takes decades to break down.

Instead, use sturdy paper, or plant-based biodegradable bags. The corn-based BioBags, for example, are certified by the Biodegradable Products Institute to break down in a matter of days (in industrial landfills; probably longer in a home compost pile).

If you chose to compost your pet waste,you should have a separate compost pile for pet waste, and you should not use the resulting soil on anything edible. As always, you want the compost pile to be HOT. The best practice is to ensure optimum temperatures is through layering and turning.

Or you can use worms...
The best solution (in my opinion) is to collect the poo in a bag (paper or biodegradable) or with a shovel and use it to fertilize your lawn (ensuring it is never used for food).

Essentially you are vermicomposting dog poo outside in the ground outside with a fancy cover.

You can make your own a poo-doo vermicomposter to put on your lawn. You dig a hole in your lawn and insert a roll-top garbage can with the bottom cut out. Fill the hole half way with bedrun worms and it is ready to go. Be sure to place it away from low-lying areas of the lawn.

When it is nearly full, dig another hole, remove the garbage can and start again. You can cover the old hole with the sod you dug for the new hole or new grass seed. Like the grass near the septic tank, it will be a lush spot in your lawn.

The response on this has been great from people using it. It makes so much more sense than sending it to the landfill.

If you have worms, you can do this in about an hour with a cash outlay of <$20 to buy a container with a cover (like the Rubbermaid bullet 2 gallon roll top can) that will last for years.

Try this in your yard and let me know how it goes.

Cheers,
Mark

Originally published on April 4, 2009

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QUESTION: What do I do with worm castings in March?!

9/9/2016

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I realize that some of you who purchased in the fall processed last weekend when temps in Maine were spring-like. My garden is still under about 2 feet of snow. Many contacted me to ask: what do I do with 15+ gallons of worm castings in March?

Worm castings can be stored in a container like a worm bin. Keep them moist and let the castings breathe (remember that the castings are alive!). You don't want to let the casting dry out if you're going to make great tea (active organisms plus nutrients). Most recipes for tea call for about a pound of castings in 5 gallons of water (dilute to 10 gallons to use).

Castings stored this way will keep for several months-- just in time for real spring! In the interim, use what you have to make tea for your houseplants or soil amendments for seed starters. Just remember that your vermicompost may be full of viable seeds!

Tip of the hat to Bruce Deuley for his valuable contributions to the procedure. You can get the brewed vermicompost tea directions here.

Cheers,
Mark

Originally published on March 14, 2009
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Sourcing food for my herd and dreams of a composter for every home, restaurant, and grocery

8/25/2016

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When you first begin vermicomposting (with a pound of worms), it may seem as though the worms will never eat the food waste you produce. Then, as the worms multiply, you develop a nice balance and the worms keep pace with your input.When you have as many worms as I do (18 bins with 4-15 pounds), my family of cannot produce enough to keep them all fed and multiplying. So, I utilize the waste from my local organic grocer (Lois’ Natural Marketplace in Scarborough). Mary and Chris (the chefs at Lois’ deli) kindly set aside coffee grounds and food scraps when I request it.

I am writing about this not to tell you how to feed a few hundred pounds of worms, but to encourage a grass roots movement. Think of this as an alternative recycling opportunity where everyone wins.
  • Everyone wins because:
  • My worms benefit from having nice organic veggies,
  • I benefit because I have a free supply of food and I can trust them to put only worm food in the bags,
  • Lois’ benefits from having less food waste in their dumpster, and
  • In the larger scheme of things, society benefits.

That’s right, society benefits. By having less waste go to the dump (or in this case the trash-to-steam incinerator), society benefits because less food waste equals less weight equals less fuel used to truck it around. Also, I learned from Chris of EcoMaine (the company who runs the incinerator) that organics such as food waste are a poor source of energy in the trash-to-steam process. They would rather not collect food waste.


I know I haven’t made a big difference but my little contribution fits the “think globally, act locally” concept.


In the course of a year, I probably keep a thousand pounds of food and yard waste out of the waste stream (both from my home and collections from Lois’). Scale that up a few-fold, and by outdoor composting in the summer and vermicomposting in the winter, we can all make a difference.


​This makes me think: can we all reach out to grocers or restaurants in our community to see if they would be willing to set aside food waste for pickup during the spring, summer, and autumn for addition to our outdoor compost piles? Can we bring a 5-gallon bucket with us when we shop to pick up some waste veggies? Can we encourage our fellow gardeners, others in community gardens or garden clubs to do the same?


Originally published on March 1, 2009
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Vermicomposting is EASY!

8/25/2016

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Getting started is a simple process:

The key to getting started and keeping your worm bin trouble free is to follow four simple rules:

1. always bury the food under the worms and the bedding,

2. only feed in corners (alternating every week),

3. keep at least 3 inches of shredded newspaper on top (the newspaper should not be wet, moist like a wrung our sponge is OK. If it is dry, that is OK) and

4. don't over feed them.


Rule 1: burying food prevents fruit flies from finding the food in your bin.

Rule 2: feeding in corners prevents overfeeding because you can observe how much food is left from previous feedings. Corner feeding also allows worms to flee if something is wrong with the food (pH, temperature, etc.).

Rule 3: a nice think layer of bedding keeps your bin from getting too wet and also helps prevent fruit flies.

Rule 4: overfeeding is a source of problems (moisture, smell, fruit flies, etc.). Feeding too little is preferable to feeding too much. Start slowly and ramp up over time.

If you have not already started, I would encourage you to download instructions to build your own bin and get started now.

It is not too late to begin.

Cheers,
Mark

Originally published on November 19, 2008
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Bedding for worm bins and the zen of shredding newspaper

8/23/2016

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Shredding newspaper has become my second hobby (next to vermicomposting). To provide bedding for my herd, I shred a lot of newspaper.

I like newspaper because it is free and plentiful. The papers come to my home and yesterday's paper is always available.

Office paper works equally well (for an office bin, your shredded office paper would work great). You want long strips, so a standard shredder works (but not a cross-cut shredder). Long, thin strips are better because cross-cut paper tends to mat when wet and you want your bedding to be airy.

Most non-glossy printed material can also be used since most high-quality laser toner and ink-jet inks are non-toxic. If you are going to use a lot of lot of a single source in your worm bin, check with the manufacturer to be certain. The Portland Press Herald uses non-toxic ink.

There is a technique to shred newsprint. I prefer to hold it by the folded edge (1-2 sections at a time) and shred into 1/8-1/4 inch strips. It shreds really easily and it makes a nice swooshing sound. For a long time Bert thought I was sweeping every morning!

Another advantage of newspaper is that shredding it is relaxing. It sounds strange, but I shred A LOT of newspaper, and I have come to enjoy this quotidian task. It is a morning activity I appreciate after I feed my herd. I shred yesterday's paper in the cellar and listen to NPR while I sip my coffee. It is a few minutes of meditation before I start my day.

Happy shredding!
Mark

Originally published on September 27, 2008

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What can you do at home to help save the world?

8/23/2016

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In response to Natalie Jeremijenko's charge "...how do we translate the tremendous amount of anxiety and interest in addressing major environmental issues into something concrete that people can do whose effect is measurable and significant?"

I present the following list of things we can do to help the environment:

1. Reduce/reuse/recycle wherever you can: many garden centers will accept plastic pots returned after purchase.

2. Conserve ground water: build a rain garden to reduce runoff, collect rain from gutters for dry days, and water in the morning.

3. Put out native bee boxes: encourage local pollinators. See the Kate's Bee Boxes page.

4. Share your wealth: grow food for neighbors, and encourage them to grow their own and buy locally.

5. Use Best Management Practices & Integrated Pest Management for pesticides and insecticides you may use in your yard. Yes, you'll have to do some research on what you're using, but it will make the application more effective.

6. Grow natives: native plants require less work and are more hardy since they're already adapted.

7. Go renewable: consider renewable resources for mulch, potting mix, etc. What is plentiful in your area and how can it be used?

8. Start a worm bin. If you already have a bin, start a bin for a friend. Worm bins make great gifts!

9. Educate your family, friends, and neighbors: tell them about your successes with the above. You'll be surprised how many will adapt your ideas.

Cheers,
Mark

Originally published on September 24, 2008
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Fruit Flies

8/23/2016

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This time of year, fruit flies can be a real problem in the worm bin (not that they're bad for composting), but they are annoying to have in your home. The good news is you can get rid of them pretty quickly by following these suggestions.

Let's start first with prevention:
  1. Make sure your compost scraps are covered (especially in the summer). This is especially important if your scraps are kept near a window.
  2. Bury all food deep in your worm bin and keep the bedding layer at least 3 inches deep.
  3. If you have fruit flies in the kitchen or where you keep your compost scraps, assume they are laying eggs on the compost scraps. Either freeze the compost scraps or take them to your outside compost pile.

Dealing with an infestation **First know that fruit flies have a life cycle and there is an end to the problem.** The quickest way I’ve found to deal with fruit flies is as follows:
  1. Remove adult fruit flies from your worm bin and nearby area. You can do this by vacuuming them, using sticky traps, or vinegar traps. You’ll need to vacuum them at least twice a day for 2 weeks to be sure you get all the adults from the eggs of the generation you first removed. Sticky and vinegar traps should be monitored and replaced when needed.
  2. Make your worm bin less attractive to the flies. This means not adding more food to your bin until your infestation is under control. Your worms can go without food for a few weeks. Fruit flies cannot.
  3. Make your bin more dry. Slightly dry bins are less prone to develop flies (addresses a potential pH problem). You are not looking to make a BIG change here only a slight change in dampness. Adding freshly shredded newspaper to the BOTTOM layer of your bin will do the trick. Alternatively, you can upend the contents of your bin and add more bedding over the former bottom contents.
  4. Fruit flies need to fly to mate-- if you fill your bin with newspaper that will also help.
  5. OPTIONAL... I read a tip earlier this year from a fellow vermicomposter (in Australia!) who uses diatomaceous earth (DE) to control flies. Flies are VERY bad in Australia apparently. I have not tried it, but you can get DE from garden centers (or ACE Hardware). DE kills insects and it won't hurt worms, plants or you. I think it is worth a try in combination with the other steps. If you have used DE, let me know how it worked and how much you used.

If you follow these steps you will be free of fruit flies in a few weeks. The most important things you can do are bury your food and kill/remove the adult fruit flies.

Happy composting!
Mark

Originally published on September 4, 2008
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Using Vermicomposting to Sustainably Manage Horse Manure

7/29/2016

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I learned of this from a web article by Colorado State University Cooperative Extension
(Vermicomposting Horse Manure by A.B. Card, J.V. Anderson and J.G. Davis).
 
Briefly, the concept is to use red wigglers to turn your horse manure into compost. I thought this would be a great experiment to try at my brother's horse farm. The web article above presents 2 options; we used option 1 in which aged horse manure is placed into a windrow and seeded with red wigglers.

We started on September 10, 2006 with about 5 pounds of red wigglers. As shown in the photo below, this is likely too few worms for the amount of horse manure used, but it is a start. Note that 5 pounds of red wigglers will cost approximately $100.

UPDATE - April, 2007: Steve reported that he has harvested some beautiful black soil for his garden from the windrow. They also see many wild turkeys picking through the windrows­­ could they be eating the worms???

UPDATE - August, 2007: Steve reported that the windrows have been a success. He has been able to manage his manure better with less runoff.

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    Mark Follansbee

    Vermicomposting and beyond! Check out what I've been up to on my blog.

    Please note that I'm migrating my blog from its original site. I'll be reposting previous entries until the move is complete. Click here to visit the full Blog Archive.


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