Method for evaluating comprehensive performance of sludge dewatering conditioner

A comprehensive performance and sludge dewatering technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of not comprehensively evaluating the conditioner function

Pending Publication Date: 2016-10-26
SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the evaluation of conditioners is unilaterally considering the filtration performance, sedimentation performance and dehydration degree, and there is no method that can comprehensively evaluate the function of conditioners

Method used

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  • Method for evaluating comprehensive performance of sludge dewatering conditioner
  • Method for evaluating comprehensive performance of sludge dewatering conditioner
  • Method for evaluating comprehensive performance of sludge dewatering conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take the river sediment, which is black and odorous and soft mud, and dilute it to the initial water content W 初始 It is 75% mud, and the water added to adjust the water content is the overlying river water of the river bottom mud. If the sludge to be tempered has no overlying water or sediment supernatant, just add tap water to adjust the water content. In the embodiment, the diluted mud is the sludge of the present invention, and the diluted mud is used as the experimental object, and a certain amount of initial mud is loaded with a special funnel of a CST instrument with a diameter of 1 cm, and the capillary water absorption of the mud is measured by a CST instrument. timeCST 前 ,, test the water content of the initial mud W 初始 , take a certain amount of initial mud and filter it with qualitative filter paper, collect the filtrate, use the national standard method to analyze COD on the same day, and get COD 前value. Select 5 representative conditioners 1-5, add each ...

Embodiment 2

[0066] Take 13 kinds of conditioners, among which conditioners 1-5 are the same as those in Example 1, and the components of conditioners 6-13 are shown in Table 8, and the same is added according to the conventional dosage or optimal dosage of each conditioner In the mud, record the volume of sedimented sludge, and draw a curve diagram of the volume of sedimented sludge with time, to obtain figure 1 . from figure 1 It can be seen that the solid-liquid separation of sludge is more obvious in the first 4-7min, the sludge sedimentation speed is faster, and then the solid-liquid separation speed tends to be gentle, so the sludge precipitation measured after 4-7min is selected. Volume V A , the V A with V 30 The ratio of s as S A The settling velocity of the conditioned sludge can be well described, a concept that has never been proposed before in any literature or patent application documents.

[0067] Table 8 Ingredient list of conditioners 6-13

[0068] Conditio...

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Abstract

The invention discloses a method for evaluating the comprehensive performance of sludge dewatering conditioners. A set of uniform and comprehensive evaluation indexes capable of being quantitatively calculated is selected. The evaluation indexes comprises SV and SA of the sludge settling performance, SCT of the sludge filtering performance, a dewatering rate W of sludge dewatering degree, a filtrate water quality index COD, pH and turbidity, the indexes are integrated together to form an evaluation index Ecp. The performance of various conditioners can be compared through comparison of the Ecps. The vacancy of the evaluation method for the comprehensive performance of the current conditioners is filled up. New evaluation methods are defined for the evaluation indexes CST and COD capable of being quantitatively calculated. A filtering performance improving rate PCST is used for expressing the improving or baffling action degree of the conditioners to the sludge filtering performance better. A COD change rate GCOD is used for expressing the digestion or increasing degree of the conditioners to filtrate reductive substances better. The evaluation indexes Ecps for the comprehensive performance of the sludge dewatering conditioners are provided. The evaluation method is objective and quantified and has high repeatability, operability and practicability.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method for evaluating the comprehensive performance of a sludge dehydration conditioner. Background technique [0002] With the rapid development of the economy and the improvement of people's living standards, industrial development, urban construction, dredging of rivers and lakes, and sewage treatment plants all produce a large amount of sludge. In order to prevent secondary pollution caused by sludge accumulation and shorten the drying time, investment Adding dehydration conditioner to sludge conditioning is a key technology to quickly realize sludge reduction and subsequent resource utilization. If the mud is not conditioned, mechanical dehydration is also extremely difficult. The current research mainly focuses on the comparison and selection of conditioning schemes and the optimization of conditioning agent formulations, etc., but the performance evaluation indi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG06F2219/10G16Z99/00
Inventor 王慧王茜徵桂丕翟晓峰于伟鹏江亚雄李化山李诗刚
Owner SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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