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Method for recycling urban sewage

A technology for urban domestic sewage and sewage treatment plants, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the deterioration of water quality in receiving water bodies, increase the cost of water body treatment, and reduce environmental pollution. Huge pollution load and other problems, to achieve the effect of ensuring efficient recycling, shortening the water change cycle, and widening supervision

Active Publication Date: 2014-01-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for large and medium-sized cities, even if they are discharged according to the most stringent Class A standard, due to the large population and large amount of pollutant discharge in the city, the pollution load on the environment is very huge.
It is very likely that the sewage receiving water body will not be able to self-purify all pollutants, resulting in deterioration of the water quality of the receiving water body
Will greatly increase the cost of water treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: The methods for recycling urban domestic sewage are as follows:

[0030] 1. Overview

[0031] (1) Water supply situation in Kunming: There are 12 waterworks in the main urban area of ​​Kunming. The design capacity of daily water supply is 1.625 million cubic meters, and the actual daily water supply is about 830,000 cubic meters. The annual water supply is calculated by taking 830,000 cubic meters The volume is 302.95 million cubic meters.

[0032](2) Water quality and quantity of raw water source

[0033] Table 2: Main water supply sources in Kunming

[0034]

[0035] It can be seen from the above table that the original water source is of good quality, and the water supply capacity can meet the demand, which can ensure its dilution effect on the pollutants in the water body of Dianchi Lake when it enters Dianchi Lake as supplementary water.

[0036] (3) Current status of sewage treatment in Kunming: No. 1 to No. 8 sewage treatment plants, Cheng...

Embodiment 2

[0054] Example 2: The methods for recycling urban domestic sewage are as follows:

[0055] 1. Overview

[0056] Accounting for large and medium-sized cities: the population is 1 million, and the per capita water quota is 200L / day. The water supply is 73.0 million cubic meters per year, and the sewage treatment capacity is 62.05 million cubic meters per year. Assuming that the supplementary water volume is equivalent to the sewage treatment volume, the supplementary water quality is divided into , , kind. The drainage of its sewage treatment plant adopts the first-class A standard and B standard.

[0057] 2. Technological transformation of sewage treatment plants

[0058] combine figure 1 Advanced treatment of the effluent from the sewage treatment plant is carried out using the first-stage reverse osmosis treatment process. Total waste water 200,000 m 3 / d, the designed treatment water volume here is 50,000 m3 / d, and the influent water quality is Grade A standa...

Embodiment 3

[0072] Example 3: The methods for recycling urban domestic sewage are as follows:

[0073] 1. Overview

[0074]Accounting for small and medium-sized cities: the population is 200,000, and the per capita water quota is 200L / day. The water supply volume is 0.146 billion cubic meters per year, and the sewage treatment volume is 0.1241 billion cubic meters per year. Assuming that the supplementary water volume is equivalent to the sewage treatment volume, the supplementary water quality is divided into , , kind. The drainage of its sewage treatment plant adopts the first-class A standard and B standard.

[0075] 2. Technological transformation of sewage treatment plants

[0076] Advanced treatment of the effluent from the sewage treatment plant is carried out using the first-stage reverse osmosis treatment process. The total wastewater volume is 34,000 m 3 / d, the designed treatment water volume here is 40,000 m 3 / d, the influent water quality is Grade A standard (t...

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Abstract

The invention discloses a method for recycling urban sewage. A simple sewage treatment plant is improved to integrate the functions of sewage treatment and water supply; the method is used for technically improving the sewage treatment plant to guarantee that outlet water meets the corresponding recycled water quality standards, namely the drinking water sanitary standards, the water supply requirements of a tap water supply plant or other recycled water quality standards; the financial burden caused by the urban sewage recycling measure is borne by a water consumption main body; and a responsibility main body is organically coupled with a sewage discharge main body, so that the water resources are effectively recycled, the water quality of an original sewage discharge receiving water body is restored, and the water resource environment is effectively improved and restored at last.

Description

technical field [0001] The invention belongs to the field of pollution control and recycling of sewage, in particular to a method for pollution control and recycling of urban domestic sewage. Background technique [0002] At present, the treatment technology of polluted water body can be divided into chemical treatment, physical treatment and biological treatment according to the treatment methods. The chemical method requires a large amount of chemical agents, and its operating cost is relatively high. It is often used for sewage treatment in specific industries; most domestic sewage treatment plants use biological methods, and biological methods mainly refer to activated sludge methods, mainly including (1) traditional Activated sludge process and its improved A / O, A 2 / O process, the A / O treatment effect is stable, and can achieve the goal of denitrification and phosphorus removal; A 2 / O By setting anaerobic zone, anoxic zone and aerobic zone, the effect of synchronous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08
Inventor 瞿广飞吴淼淼宁平赵健蓉
Owner KUNMING UNIV OF SCI & TECH
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