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Sewage treatment filtercake by taking river sludge as raw material and manufacturing method

A technology for sewage treatment and raw materials, applied in water/sludge/sewage treatment, biological water/sewage treatment, separation methods, etc. Granular filter material output and other issues, to achieve the effect of rough surface, low cost, high performance price ratio

Active Publication Date: 2010-05-26
NANTONG SHENGYANG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As the carrier of microorganisms in the biofilm method, the filter material directly affects the whole process of the growth, reproduction and shedding of microorganisms, and affects the effect of water treatment.
The main filter materials currently on the market in my country are produced with raw materials such as fly ash, and the performance parameters can meet the needs of the filter process. However, due to the use of non-renewable resources such as shale and clay, the output of ceramsite filter materials is limited, making The price of ceramsite filter material is higher

Method used

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  • Sewage treatment filtercake by taking river sludge as raw material and manufacturing method

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Effect test

Embodiment 1

[0017] Use riverside silt and mica powder as raw materials. The ratio is: 80kg of riverside sludge, 15kg of fly ash, 5kg of steelmaking red mud, plus 2kg of bulking agent (mica powder). The production process is as follows: 1. Add 80kg of riverside sludge, 15kg of fly ash, 5kg of steelmaking red mud and 2kg of mica powder into the mixing kettle for 20 minutes, then add 28kg of water and 2kg of polyacrylamide solution (concentration 0.2%) were mixed and artificially granulated. 2. Put the pellets into a sintering furnace with a temperature of 400°C, heat and dry for 45 minutes, and then heat up and sinter to create pores. When the temperature was raised to 1050°C, the temperature was kept for 15 minutes. 3. After the sintered ceramsite is out of the furnace, it is naturally cooled to room temperature.

Embodiment 2-5

[0019] The difference between embodiment 2 and embodiment 1 is that the consumption of mica powder is reduced, the consumption of all the other raw materials is constant, and the operating conditions are constant. The difference between Example 4 and Example 1 is that the amount of fly ash is reduced and the amount of steelmaking red mud is increased. The difference between Example 5 and Example 1 is that the raw material is all riverside sludge, and the rest remain unchanged. In Example 3, the bulking agent was changed from mica powder to charcoal powder, and in Example 4, the bulking agent was changed from mica powder to waste plastic powder, and the amount of raw materials and operating conditions were unchanged, which was the same as in Example 1. The raw material proportions of Examples 1-5 are shown in Table 1, and the physical and chemical performance indexes of the corresponding filter materials are shown in Table 2.

[0020] Table 1

[0021] Example number ...

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Abstract

The invention discloses a sewage treatment filtercake by taking river sludge as a raw material and a manufacturing method, and the filtercake comprises the following components by mass percent: 80-100% of river sludge, 0-15% of flyash, 0-5% of red mud for steel production and 2-5% of swelling agent; the filtercake is obtained by adding 25-30% of water and 2-4% of pressing binder in terms of the mass of the raw material into the above components through the steps of mixing, pelleting, drying and high-temperature sintering successively. The filtercake in the invention has high main performance indexes such as film hanging property, water-gas distribution uniformity, bulk specific weight, strength, porosity, specific area and the like, and can be manufactured with a specified aperture and an apparent density conveniently by controlling the granularity and dosage of charcoal powder or mica powder, and has the advantages of wide sources of raw materials, simple production process, no pollution, low cost and high added value; the production equipment and technology in the current cement plants can be switched to producing ball-shaped filtercake of which the performance indexes for sewage treatment conform to the environmental protection requirements, thus achieving the effect of treating waste by waste.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a spherical porous light sewage treatment filter material produced from riverside silt as a main raw material. Background technique [0002] In the water network area of ​​the Yangtze River Basin in my country, people are used to calling the small rivers (mostly canals excavated manually in the past dynasties) that are not mainly used for navigation but are closely related to agricultural production and people's daily life as "hebang". In recent years, due to the increasing level of rural urbanization, the riverside has lost its original function, followed by a large amount of industrial sewage, domestic wastewater, agricultural drainage and domestic garbage pouring into the riverside, causing riverside pollution and sludge The siltation becomes a collection pool for village sewage and garbage. When the rainy season comes or the sewage accumulates to a c...

Claims

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Application Information

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IPC IPC(8): B01D39/06C02F3/10
CPCY02W10/10
Inventor 张文艺李定龙马建锋戴竹青
Owner NANTONG SHENGYANG ELECTRIC CO LTD
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