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Domestic sewage treatment process

A domestic sewage and treatment process technology, applied in the direction of biological water/sewage treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of poor operation stability of sewage treatment system, unstable effluent quality, and low sewage treatment efficiency To achieve the effect of promoting the improvement of treatment efficiency, accelerating the enrichment and adsorption removal, and improving the quality and stability

Pending Publication Date: 2021-02-09
千世亨建设科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the traditional domestic sewage treatment process, the A2 / O treatment process of large integrated reaction pool or filter is mostly used, but the operation and maintenance costs of the equipment are high, especially for the treatment of domestic sewage in townships, the operating efficiency is low However, for the existing artificial ecological wetland treatment process, there are often problems such as poor settlement stability, low sewage treatment efficiency, system blockage, and poor operational stability of the sewage treatment system, resulting in unstable effluent quality

Method used

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Examples

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Effect test

Embodiment 1

[0024] Embodiment 1-a kind of domestic sewage treatment process comprises the steps:

[0025] Step 1: Pretreatment, filter the domestic sewage through the grid well to remove large solid impurities in the sewage;

[0026] Step 2: Primary flocculation, put the domestic sewage in the primary flocculation tank, add flocculant A, the dosage is 18.5mg per liter of domestic sewage, make it react with the organic matter and suspended particles in the sewage for 15 minutes, and get the treatment Water I; The flocculant A comprises 30 parts of iron sulfate, 10 parts of aluminum sulfate, 3 parts of chitosan and 20 parts of cationic starch according to the ratio of parts by weight;

[0027] Step 3: Anaerobic primary degradation, the treated water I is subjected to anaerobic degradation reaction in the anaerobic reaction tank for 15 hours, and the biodegradable organic matter in the sewage is removed to obtain the treated water II;

[0028] Step 4: secondary flocculation, put the treated...

Embodiment 2

[0030] Embodiment 2-a kind of domestic sewage treatment process, comprises the steps:

[0031] Step 1: Pretreatment, filter the domestic sewage through the grid well to remove large solid impurities in the sewage;

[0032] Step 2: Primary flocculation, put the domestic sewage in the primary flocculation tank, add flocculant A, the dosage is 23.5mg per liter of domestic sewage, make it react with the organic matter and suspended particles in the sewage for 20 minutes, and get the treatment Water I; The flocculant A comprises 50 parts of ferric sulfate, 20 parts of aluminum sulfate, 5 parts of chitosan and 30 parts of cationic starch according to the ratio in parts by weight;

[0033] Step 3: Anaerobic primary degradation, the treated water I is subjected to anaerobic degradation reaction in the anaerobic reaction tank for 20 hours, and the biodegradable organic matter in the sewage is removed to obtain the treated water II;

[0034] Step 4: secondary flocculation, put the trea...

Embodiment 3

[0036] Embodiment 3-a kind of domestic sewage treatment process, comprises the steps:

[0037] Step 1: Pretreatment, filter the domestic sewage through the grid well to remove large solid impurities in the sewage;

[0038] Step 2: Primary flocculation, put the domestic sewage in the primary flocculation tank, add flocculant A, the dosage is 20.5mg per liter of domestic sewage, make it react with the organic matter and suspended particles in the sewage for 16 minutes, and get the treatment Water I; The flocculant A comprises 40 parts of ferric sulfate, 12 parts of aluminum sulfate, 4 parts of chitosan and 22 parts of cationic starch according to the ratio in parts by weight;

[0039] Step 3: Anaerobic primary degradation, the treated water I is subjected to anaerobic degradation reaction in an anaerobic reaction tank for 16 hours, and the biodegradable organic matter in the sewage is removed to obtain the treated water II;

[0040] Step 4: secondary flocculation, put the treat...

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Abstract

The invention provides a domestic sewage treatment process. The domestic sewage treatment process comprises the following steps: (1) pretreating domestic sewage; (2) adding a flocculating agent A, andcarrying out a primary flocculation reaction; (3) carrying out an anaerobic degradation reaction in an anaerobic reaction tank; (4) adding a flocculating agent B, and carrying out a secondary flocculation reaction; and (5) introducing the treated domestic sewage into a composite artificial subsurface flow wetland consisting of a primary artificial subsurface flow wetland, a secondary artificial subsurface flow wetland and a tertiary artificial subsurface flow wetland, and discharging and sterilizing the domestic sewage to obtain purified water, wherein the primary artificial subsurface flow wetland is composed of a filler, reed and scirpus acutus, the secondary artificial subsurface flow wetland is composed of a filler, Agrostis matsumurae and ryegrass, and the tertiary artificial subsurface flow wetland is composed of a filler and astragalus smicus. According to the invention, a combined sedimentation technology, an anaerobic degradation technology and an artificial wetland treatmenttechnology for domestic sewage are organically combined, so the treatment efficiency of domestic sewage is improved, the quality and stability of artificial wetland ecological sewage treatment are greatly improved, effluent quality is stable, and operation and maintenance costs are low.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a domestic sewage treatment process. Background technique [0002] Domestic sewage mainly comes from kitchen water, washing water and toilet water in daily life. Most of them are non-toxic inorganic salts, containing nitrogen, phosphorus, sulfur and many pathogenic bacteria. At present, in the traditional domestic sewage treatment process, the A2 / O treatment process of large integrated reaction pool or filter is mostly used, but the operation and maintenance costs of the equipment are high, especially for the treatment of domestic sewage in townships, the operating efficiency is low However, for the existing artificial ecological wetland treatment process, there are often problems of poor settlement stability, low sewage treatment efficiency, system blockage, and poor operational stability of the sewage treatment system, resulting in unstable effluent quality. Therefore...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/16C02F101/10
CPCC02F9/00C02F1/001C02F1/5245C02F1/5236C02F3/28C02F3/32C02F1/56C02F2101/105C02F2101/16
Inventor 葛婧
Owner 千世亨建设科技有限公司
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