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Today we talk about such a small problem, it is estimated that this small problem is also a small problem that plagues countless novices, that is, when doing microbial microscopy, for the "bell worms", it obviously looks like a big bell-shaped head, why can there be so many types? For example, equip branch insects, tired branch insects... So let's take a look at the bell worm and its "relatives"
<h1 class = "pgc-h-arrow-right" > (i) bellworm genus</h1>
First of all, let's take a look at the insect body characteristics of the bell worm: the bell worm is 35 to 85 μm long, and the bell worm partially shrinks the worm body by the tail handle. It is characterized by muscle filaments in the tail stalk, no branches, and the salient feature compared to isophyllus and twig worms is that the genus Bell worm will be fixed to the floc alone. The caudal stalk is mostly straight, but sometimes curled into a spiral. After the activated sludge method is treated well and the sludge floc is firm, the first occurrence of the limbophylla is the bell worm.
When the bellworm and other fringed hairy organisms contract, the perimeter of the mouth often closes when stimulated or the state becomes unsuitable. Sometimes the mouth circumference is closed immediately after opening and then starting to move, sometimes it has been closed to stop activity, death or the formation of free individuals and other situations, once the bell worm does not adapt to environmental conditions, the tail stalk breaks into free individuals to swim around. The daughter cells of the bellworm proliferation also form free individuals to wander. It is difficult to distinguish free individuals from ciliates if they are not skilled in observation, but when two heads are observed on the tail stalk and no head and tail stalk, the possibility of free individuals is high. Free individuals find a suitable place for environmental conditions, and after the tail stem is re-extended and implanted, they will continue to start activities.
<h1 class = "pgc-h-arrow-right" > (ii) monototylars</h1>
The body length of the solitary astolar is 100 to 200 μm, and the solitary astoccyges form a group connected by branches and tail stalks, and there are muscle filaments that are not connected to each other in the tail stalk. Monototozoans are not connected to each other because the muscle filaments are not connected, and even if one cell is stimulated, the other cells do not contract. The peristomeric part of the solitary worm is larger than the cell width, and the solidified flocculent is both compact and large. Monotoplasms are basically present when they are in the best condition of treatment, and the larger the number of individuals in the population, the better the treatment.
<h1 class= "pgc-h-arrow-right" > (iii) caps</h1>
The body length of the cap fibrella is 30 to 250 μm, the capfibrella forms a group connected by the branched tail stalk, there is no muscle filament in the tail stalk (the same as the isophyllum worm), and the difference with the isophyllum is that the small mouth disc of the cell mouth protrudes obliquely from the mouth circumference, and the tail stalk is thin. Capfibrella occurs in large numbers in treatment plants with a high proportion of fecal sewage, when the treatment tends to be good. The worm body often forms a circular group.
<h1 class = "pgc-h-arrow-right" > (iv) tired branches</h1>
The body length of the twigs (also known as isochophyllum) is 50 to 100 μm, and the twigs are in a semicircular group with no muscle filaments in the tail stalk. Unlike capworms, there is a very large and flat mouth circumference, acellular protruding parts of the mouth, and a thick caudal stalk. Most of the caudal stalks become very long , especially in biofilm methods , where free individuals can often be observed to have detached long-tailed stalks. Only the elongated tail stem is observed, which is easily confused with mold and filamentous bacteria. Tired branches of insects from the good period of time, sludge tends to disintegrate before and after the beginning of the appearance, because the insect body is large, fixed must have a large floc, sometimes fixed on the biofilm method of the filler surface and water treatment drainage pipes, etc., forming a large number of individual groups.
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