It isn't likely that termites are the cause of the sawdust. It would be more likely that it is some sort of ant or beetle. If you continue to see evidence that something is going on, consult with a professional.
Termites!!! Call the exterminator - now!
Signs of termites that homeowners should look out for include mud tubes on walls or foundation, hollow-sounding wood, discarded wings near windows or doors, and the presence of sawdust-like droppings called frass.
Carpenter ants dig through wood leaving a sawdust residue. Wood bees or carpenter bees also leave a sawdust residue as they dig into wood to make a nest. Termites actually eat the wood so they would not leave a sawdust residue
Sawdust is symbolic of the damage and waste that is necessary in creation. In order for a piece of furniture, structure or anything to be created, there will always be consumption.
Sawdust is made from wood which contains cellulose- cellulose is not digestible by the human body (unless we had special microbes in our gut like termites) So I can't imagine doing this for flavor but perhaps it may have been useful for preservation of the fish?
Most people think of something being soluble if it will dissolve in water. Sawdust doesn't dissolve in water. In general the cellulose and other structures that compose sawdust are not particularly soluble until they are broken down chemically - which is not really dissolving. Once they have been broken down, the resulting products can be dissolved - but at that point you aren't really dissolving sawdust anymore, you are dissolving the products of the chemical reactions that have broken down the sawdust.
Place the sawdust and gravel mixture in water and stir. Let it sit for a time - the gravel will fall to the bottom and the sawdust will float on the top. Density of gravel is greater than water and density of sawdust (wood) is less than water. The layer of sawdust can be carefully removed by skimming it off water's surface or by pouring gravel and sawdust through a series of mesh screens of varying size (the screens can be used with dry or wet mixture)I would use the difference in density of the two materials. A simple method would be to have a stream of the mixed materials poured from a higher elevation to a lower, with a stream of air blowing across the stream. Being less dense, the sawdust will be blown to one side, the gravel will drop straight down. Of course, you COULD just drop the mixed materials into water- sawdust floats, gravel does not. Sawdust will also burn, where gravel will not. Roasting the gravel at a heat above the combustion point of sawdust will cause it to ignite, burning the sawdust away, leaving gravel. Of course, if you have plenty of time, just turn a few termites loose on the mix- they will eat wood- but not gravel!
sawdust
Yes you can use sawdust provided it is made of pure pine sawdust. It should be noted that as it says in it's name sawdust is dusty and can cause respiratory problems in horses.
Sawdust will not float in water. If you have some sawdust to dispose of, you should always place it in the proper waste containers.
There is no standard collective noun for the noun 'sawdust'.A collective noun is an informal part of language. Any noun that is suitable for the context can function as a collective noun; for example, a pile of sawdust, a cloud of sawdust, a shower of sawdust, etc.
To make the noncount noun "sawdust" plural, you would need to refer to it in a countable form. For example, you could say "pieces of sawdust" or "bags of sawdust" to indicate multiple quantities of sawdust. By using quantifiers or containers to specify the amount or units of sawdust, you can effectively convey the idea of more than one without changing the noncount nature of the noun itself.