JP2008264753A - Solidification agent, and sludge-like waste, or sludge-like waste liquid treatment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve handling by preventing liquid dripping due to the treatment of sludge-like waste or sludge-like waste liquid. <P>SOLUTION: The solidified matter is obtained by mixing in and agitating a sludge-like waste hardening agent to which a natural fibrous matter or natural material dry powder whose safety is confirmed is added as a binder of the moisture absorbing and gelatinizing material of the sludge-like waste or the sludge-like waste liquid, konjak mannan or konjak residue powder is added for the purpose of excess moisture absorption and gelatinization of a dry matter, and the hydroxide of an alkaline earth metal or carbonate is added as a gelatinizer further. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  Various liquid materials in containers brought into food factories, residual printing ink in printing factories, water-soluble paint after opening cans, etc. are difficult to separate water, making it difficult to dispose of waste quickly and transport to appropriate facilities Sludge-like waste, sludge-like waste liquid treatment, and muddy waste-like soil treatment generated at construction sites.

Conventional technology

  Residues of liquid food production raw materials used in food factories and the like are washed in containers, and the residues and washing wastewater are led to the wastewater treatment facility in the factory and treated by the activated sludge method. Unlike the treatment of washing water in the entire factory, mixing of wastewater with a relatively high concentration in the wastewater treatment system at one time increased the burden on the wastewater treatment facility, making it difficult to treat wastewater stably. A large amount of diluted water was required to treat the high concentration organic waste liquid.

  In addition, the water-based paint residue after the completion of the painting work at the painting site using the water-based paint and the washing water of the equipment used are not only simply containing organic substances but also difficult to discharge into the sewage due to the presence of colored pigments. . The residue of the water-based paint also became a source of bad odor that could not be easily opened after it had been spoiled during storage due to contamination with germs in the air.

  As a conventional treatment method, cement is added to the residue of the water-based paint to make it a solid, and the disposal is entrusted to an industrial waste disposal contractor. Measures for cleaning water at the painting site were difficult.

  At construction sites, mud containing large amounts of groundwater and cement milk is discharged along with the pile driving process and foundation excavation work, etc., but dump trucks even if the components are safe in the environment However, it was not possible to load and transport the water in a settling tank, and using a flocculant etc., drained the fresh water part and discharged the sediment as residual soil.

  Prevent dripping for the treatment of sludge waste or sludge waste liquid and improve handling.

  Add a natural fiber or natural product dry powder that has been confirmed to be safe as a water-absorbing or sludge-like waste water or gelled product, and add konjac mannan for the purpose of absorbing excess water and gelling the dried product. Alternatively, konjac flying powder is added, and further a solid waste solidifying agent added with alkaline earth metal hydroxide or carbonate as a gelling agent is mixed and stirred to obtain a solidified product.

  By adding and stirring the solidifying agent of the present method to sludge-like waste or sludge-like waste liquid in various fields, a paper clay-like solidified product can be obtained, and further dried to obtain a lightweight dry mass.

本プロツバル社製）を選んだ。模擬資材洗浄水は水性アクリルシリコン系塗料を幅４５ｍｍの刷毛に付け、５００ｍｌの水の入った容器中で洗ったもので、塗料は約８ｇ混入した。The best implementation method when practicing the present invention for the purpose of water-based paint residue treatment is described below. Water-based enamel paint (trade name: Rafton EM Enamel Suzuka Fine Co., Ltd.), water-based urethane paint (trade name: Eco Urethane Suzuka Fine Co., Ltd.), water-based fluoro paint (trade name: Eco-Fluorine Suzuka Fine Co. ), Water-based silicone paint (trade name)

This Protuval Company) was selected. The simulated material washing water was obtained by applying a water-based acrylic silicone paint to a 45 mm wide brush and washing it in a container containing 500 ml of water. About 8 g of the paint was mixed.

As a sludge-like waste liquid treatment agent, 30 parts by weight of konjac flying powder, 68 parts by weight of corrugated paper powder, and 2 parts by weight of slaked lime were prepared by thoroughly stirring and mixing. About 5 types of water-based paints with different main resin and simulated material washing water 300 g of water-based paint and 300 ml of simulated material washing water are taken in a ball, and 5%, 10%, 15%, 20% by weight was added and stirred to examine the solidified state.

  ◎ in the table is an appropriate solidified state, the gelation is insufficient when the treatment agent addition amount to the water-based paint is 5%, the gel strength is excessive when the addition amount is 20%, and stirring after the addition is difficult, The problem was that the surplus treatment agent remained as a powder. In the simulated material washing water, a good solidified state was confirmed with 20% of the treatment agent.

  Due to the leakage of groundwater, the remaining soil generated during excavation work during foundation work and the piled-up work becomes difficult to remove from the work site. It has become a common practice for such residual soil treatment to ground a tank for solid-liquid separation in the field and wait for natural sedimentation. From the beginning of construction, it was difficult to predict the amount of muddy water generated, and rapid muddy water treatment was desired.

  For the purpose of treating muddy water generated during foundation construction, a sludge-like waste treatment agent comprising 80 parts by weight of konjac flying powder, 18 parts by weight of bran, and 2 parts by weight of slaked lime was prepared. 5t of mud generated from excavation work was put into a sedimentation tank (capacity 10t), and the remaining soil was settled for 15 minutes. Assuming a residual soil content of approximately 2t, the upper water, which was gradually becoming clear from the upper part, was sent to a separate sedimentation tank for 2.5t. 110 kg of sludge-like waste treatment agent was put into the sedimentation tank where the muddy water remained, and stirred with a heavy machine. Even if the shovel was full of the remaining soil, it was judged that it could be transported because there was no muddy water dripping.

  As a result of repeated tests of the same residual soil treatment, sludge treatment at a construction site has been allowed to stand for some time in a sedimentation tank, etc., and after separating the supernatant water, sludge waste treatment of about 4% of the amount of remaining mud It was found that residual soil that can be transported can be obtained by adding and stirring the agent. On the other hand, when expediting treatment is required, sludge-type waste treatment agent is introduced into the excavated foundation ditch as the excavation progresses, and stirring, mixing, and carrying out are carried out in accordance with groundwater leakage and generation of muddy water. Smooth soil removal can be carried out by repeating the above.

  In order to reduce the amount of sludge treatment agent added at the construction site, there is a method of using konjac milling instead of konjac flying powder of the prepared treatment agent, but the amount added to the muddy water is small. Therefore, uniform mixing is difficult with heavy machinery operation and often becomes tedious. In addition, the odor caused by contact between alkali and konjac flour is the odor of konjac. use.

  When alkaline residual soil is generated in pile driving work, the calcium content in the residual soil can be used as a component of the sludge treatment agent, but it is difficult to judge the soil pH on site, and the initial addition of alkali content to the sludge-like waste treatment agent Is desirable.

  In places where sludge-like wastewater or sludge-like waste is generated, such as in the paint industry, building industry, food industry, etc., it is possible to make waste easy to handle with the treatment agent of the present invention as appropriate according to the situation. This is a groundbreaking technology in any industry due to the total cost reduction effect of workability factories.

  Depending on the nature, location, frequency and amount of sludge wastewater or sludge waste, it is possible to prepare the best treatment agent for sludge waste liquid or sludge waste, but observe the state of mixing. However, the addition amount can be easily determined by sequentially adding the treatment agent amount.

Claims (4)

  Sludge-like waste formed by mixing 50 to 80% by weight of plant fiber such as paper pulp, rice bran, wood powder, bran or straw, or dry powder 50 to 80% by weight, konjac flour or by-product flying powder at the time of konjac production, or Sludge waste liquid solidifying agent.   0 to 80% by weight of plant fiber such as paper pulp, rice bran, wood powder, bran or cocoon, or dry powder 50 to 80% by weight, konjac flour or 1% to 80% by weight of by-product flying powder at the time of konjac production A sludge-like waste or sludge-like liquid solidifying agent obtained by adding 5 to 50% by weight of calcium hydroxide, calcium carbonate, magnesium hydroxide or calcium carbonate as a gelling agent for flying powder.   A sludge-like waste or sludge-like waste liquid characterized by adding a preservative to the sludge-like waste or sludge-like liquid solidifying agent according to claim 1 and claim 2 to prevent decay and bad odor in the drying step of the solidified matter. Solidifying agent.   By adding and kneading the sludge-like waste or sludge-like waste liquid solidifying agent of claim 1, claim 2 or claim 3 to the sludge-like waste or sludge-like waste liquid, the gel-like waste without dripping or further A method for treating sludge-like waste or sludge-like waste liquid that is dried into solid waste.