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 produc

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1

[0017] It uses river silt and mica powder as raw materials. The mixing ratio is: 80kg of river silt, 15kg of fly ash, 5kg of steelmaking red mud, plus 2kg of expanding agent (mica powder). The production process is as follows: 1. Put 80kg of river sludge, 15kg of fly ash, 5kg of steelmaking red mud and 2kg of mica powder into the mixing kettle for 20 minutes, and then add 28kg of water and 2kg of polyacrylamide solution. (Concentration 0.2%) for mixing and artificial granulation. 2. Put the pellets into a sintering furnace at a temperature of 400°C, keep them dry for 45 minutes, and then heat up and sinter to make holes. When the temperature is increased to 1050°C, keep it for 15 minutes. 3. The sintered ceramsite is naturally cooled to room temperature after being discharged.

Example Embodiment

[0018] Example 2-5

[0019] The difference between Examples 2 and 3 and Example 1 is that the amount of mica powder is reduced, the amount of other raw materials is unchanged, and the operating conditions are unchanged. 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 river sludge, and the rest remains unchanged. In Example 3, the puffing agent was changed from mica powder to charcoal powder, and in Example 4, the puffing agent was changed from mica powder to waste plastic powder. The amount of raw materials and operating conditions were the same, which was the same as Example 1. The raw material ratios 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

[0022] Table 2

[0023...

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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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