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Compound refined diatomite sewage dephosphorization treatment agent

A technology for refining diatomaceous earth and treating chemicals, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve problems such as adverse effects of microbial reproduction, achieve low operating costs, and improve High dephosphorization efficiency and high treatment efficiency

Active Publication Date: 2016-02-24
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, adding iron salt before the biochemical process will have an adverse effect on the microbial reproduction in the biochemical pool

Method used

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  • Compound refined diatomite sewage dephosphorization treatment agent
  • Compound refined diatomite sewage dephosphorization treatment agent

Examples

Experimental program
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Effect test

example 1

[0028] Example 1 is a dephosphorization test carried out in a sewage treatment plant in the urban area of ​​Shanghai.

[0029] figure 1 It is the water quality measurement table for the comparison test of urban sewage dephosphorization treatment agents. This embodiment is made of 67% refined diatomite, 32% polymeric diacid coagulant, and 1% polydimethyldiallyl ammonium chloride, and the refined diatomite is impregnated with 33% concentration of sulfuric acid And 450 ℃ intermittent kiln baking formed. From figure 1 It can be seen that the dephosphorization efficiency of the traditional chemical phosphorus agent polyaluminum sulfate (PAC) is significantly lower than that of the compound refined diatomite sewage dephosphorization treatment agent (diatomite for short), under the premise of the same dosage , the total effluent TP of the former is not up to the standard (TP≤0.5mg / L is required). On the premise that the water quality meets the standard, the dosage of PAC should be...

example 2

[0032] Example 2 is a dephosphorization test carried out at the waste water treatment station of the clothing washing center of the Shanghai Municipal Sanitation Bureau. This embodiment is made of 74% refined diatomite, 24% polymeric diacid coagulant, and 2% polydimethyldiallyl ammonium chloride, and the refined diatomite is impregnated with 33% concentration of sulfuric acid And 450 ℃ intermittent kiln baking formed. Phosphorus-containing detergents are widely used in the production process of the clothing washing center, and the TP content in the wastewater discharged from the wastewater treatment station is relatively high. The biochemical treatment process of the wastewater treatment station has a weak ability to treat phosphorus, so it is necessary to add chemical phosphorus removal facilities in the future. The dephosphorization test was also compared with the traditional drug PAC by using the compound refined diatomite sewage dephosphorization treatment agent (diatomite...

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Abstract

The invention discloses a compound refined diatomite sewage dephosphorization agent. The compound refined diatomite sewage dephosphorization agent comprises 67-75% of modified refined diatomite, 24-32% of a polymeric diacid flucculant and 1-2% of a cationic organic polymer flocculant. The compound refined diatomite sewage dephosphorization agent has the advantages that the modified diatomite has efficient adsorption effects and the polymeric diacid flucculant and the cationic organic polymer flocculant are conducive to obvious improvement of aggregation and flocculation effects of suspended sludge blankets in a biological aeration tank or a sedimentation tank, thus the dephosphorization efficiency of sewage treatment is greatly improved; and compared with the traditional chemical dephosphorization technology only adopting an aluminium salt or a ferric salt, a technology adopting the compound refined diatomite sewage dephosphorization agent has higher treatment efficiency and a lower operation cost.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a compound and refined diatomite sewage dephosphorization treatment agent. Background technique [0002] In recent years, with the increasing implementation of national energy conservation and emission reduction policies, water environment quality standards across the country have been gradually improved, especially in the water environment treatment of three rivers and three lakes in economically developed areas, the tail water discharge of urban sewage treatment plants The first-level B standard of the national "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) has been widely implemented, which requires that the total phosphorus of the sensitive pollution water quality index is ≤ 1.0mg / L, and the environmental pollution in megacities or similar to the Taihu Lake Basin To protect sensitive areas, local governments have begun to implement stricter Cla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/56C02F1/28C02F1/58
Inventor 张华金星
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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