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Process for treating sewage in city river

A sewage treatment and river channel technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of untimely implementation, lack of funds, uncertain overall long-term planning of the city, etc., to prevent occurrence, good dosage effect, and medicine uniform effect

Inactive Publication Date: 2002-10-30
杨兆兴
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, lack of funds and uncertainty about the city's overall long-term planning have prevented these measures from being implemented in a timely manner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A, adopt 0.5 tons of Tongji River sewage in Changzhou City as the sewage sample of embodiment 1, be placed in the container;

[0026] B. According to the method provided in GB8978-1996 "Sewage Comprehensive Discharge Standard", the COD value of the above-mentioned sewage sample is determined to be 581.71, the pH value is 7.2, and the odor is relatively heavy;

[0027] C. Determine the dosage of alum and calcium carbonate according to the COD value of the measured sewage sample. Since the COD value of the sewage sample is between 500 and 600, the sewage is treated according to the standard of 1.0 kg of alum (solid) and 0.8 kg of calcium carbonate (solid) per ton of sewage, and 0.5 tons of the above-mentioned Tongji River Sewage use 0.5 kg of alum (solid) and 0.4 kg of calcium carbonate (solid).

[0028] According to alum: water is 1: 20 (weight ratio), add 0.5 kilograms of alum (industrial product) to 10 kilograms of tap water, stir, dissolve, set aside; Press calcium c...

Embodiment 2

[0032] A, the Tongji River in Changzhou city of embodiment 1 is partially intercepted, and the survey and calculation sewage weight is 1000 tons;

[0033] B, sewage COD value and pH value are with embodiment 1;

[0034] The consumption of the alum of C, every ton of sewage and calcium carbonate is the same as embodiment 1. 1,000 kg of solid alum and 800 kg of solid calcium carbonate are used to treat 1,000 tons of sewage.

[0035] By alum: water is 1: 20 (weight ratio) 1000 kilograms of alums are mixed with 20000 kilograms of tap water, stir evenly, dissolve and put into storage tank for subsequent use;

[0036] By calcium carbonate: water is 1: 30 (weight ratio), 800 kilograms of calcium carbonates are mixed with 24000 kilograms of tap waters, stir evenly and put into another storage tank for subsequent use;

[0037] The Tongji River sewage is pumped to No. 1 filter tank and flows through No. 2 and No. 3 filter tanks in sequence (each filter tank uses quartz sand as the fil...

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Abstract

A process for treating the sewage of river in urban area, that is, eliminating the foul smell of sewage and reducing its COD value features, that the alum and calcium carbontate are used as the treating chemical, and their consumptions are determined by the COD value of sewage. Its advantages are simple process, high effect and low cost.

Description

technical field [0001] The invention relates to an urban river sewage treatment technology, which is suitable for eliminating sewage odor, reducing chemical oxygen demand, and meeting national sewage comprehensive discharge standards. Background technique [0002] With the development of the economy, the scale of the city gradually increases, and the population becomes more and more concentrated. However, the random discharge of urban domestic sewage has not been effectively suppressed. In addition to people's awareness of environmental protection needs to be strengthened, there are inherent problems in the original urban construction. , and only after passing through the septic tank, it is directly discharged into the river; some sewer pipes and inspection wells in the urban area are not uniform in elevation and have a large drop, so that the sewage cannot enter the sewage treatment pipe network, but flows into the river; the developer is building a residential area. When ...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 杨兆兴
Owner 杨兆兴
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