Tower earthworm ecological filter tank system

An ecological filter and earthworm technology, applied in sustainable biological treatment, biological water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as low hydraulic load and uneven water distribution in the system

Inactive Publication Date: 2008-08-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, it adopts hydrolytic acidification tank as the pretreatment technology according to local conditions, and forms a combined process with the tower-type earthworm ecological filter; secondly, the structure of the tower-type earthworm ecological filter is improved, and the gradient tower layer design is adopted to facilitate the management of the filter , maintenance; thirdly, measures such as combining water distribution on the surface of the filler with internal water di

Method used

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  • Tower earthworm ecological filter tank system

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Effect test

Embodiment 1

[0032] Embodiment 1: A demonstration project of a tower-type earthworm ecological filter system with a daily processing capacity of 10t.

[0033] Design treatment water volume: Q=10t / d.

[0034] The hydrolytic acidification pool is 4 meters long, 3 meters wide, effective depth is 1.2m, super height is 0.3m, and the total depth is 1.5m. The water inlet pipe is embedded at a height of 25cm from the base of the pool wall, at an angle of 40° to the pool wall, and the lower edge of the nozzle is flush with the inner wall of the pool wall. The effluent is fed into the high-level water distribution tank above the tower earthworm ecological filter through the submersible electric pump. The embedding port is filled with fine stone concrete. The pool is installed in the ground, and the pool body adopts a brick and plaster structure.

[0035] The total area of ​​the tower earthworm ecological filter part is 30m 2 , the overall structure adopts brick-concrete structure,

[0036] The ...

Embodiment 2

[0044] Embodiment 2: A demonstration project of a tower-type earthworm ecological filter system with a daily processing capacity of 7t.

[0045] Design treatment water volume: Q=7t / d.

[0046] The effective depth of the hydrolytic acidification pool is 1.2m, the super height is 0.3m, and the total depth is 1.5m; the length H=3m, the width L=2m; The water inlet pipe is embedded at a height of 25cm from the base of the pool wall, and is downward at an angle of 30° with the pool wall. The effluent is fed into the high-level water distribution tank above the tower earthworm ecological filter through the submersible electric pump. The embedding port is filled with fine stone concrete. The pool is installed in the ground, and the pool body adopts a brick and plaster structure. The pool body adopts brick and plaster structure.

[0047] The total area of ​​the tower earthworm ecological filter part is 24m 2 :

[0048] The inner dimension of the high-level water distribution tank...

Embodiment 3

[0056] Embodiment three: the stabilizing function of the hydrolytic acidification pond in the embodiment 1.

[0057] When the ambient temperature is 21°C, measure the water quality index at the front entrance of the acidification tank for a week to monitor its water quality fluctuations; at the same time, take water from the distribution tank and measure its water quality indicators on Monday, Thursday, and every day of the week, respectively. Analyze water quality stability.

[0058] test finger

[0059] It can be seen from the above table that after the stabilization and degradation of the acidification tank, the concentration of various pollutants in the sewage tends to be stable, which increases the pollution impact load of the system; NH 4 + -N concentration increased to a certain extent (up to 10-15%), COD Cr The concentration dropped by 8-13%, indicating that a certain amount of ammoniation / stabilization reaction occurred in the acidification pool, which pro...

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Abstract

Disclosed is a tower earthworm bio-filter system, which is composed of a hydrolysis acidification tank and a multi-stage tower earthworm bio-filter. The hydrolysis acidification tank is a buried tank, the tower earthworm bio-filter employs modes of a modular structure, a gradient tower layer design and multistage units in series connection, and tower layers employ mode combination of a stair type or a rotary type. Inner water distributors are additionally arranged inside an earthworm bed for uniformly distributing water. The drop-aeration technique and the water spray technique are employed to increase the concentration of dissolved oxygen in sewage. The tower earthworm bio-filter system can effectively increase impact load to the sewage, and the surface hydraulic load can reach up to 1m3/ (m2,d). Capability of denitrification and dephosphorization of the system can be largely increased, total nitrogen removal efficiency of the system can be higher than 80% as tested, the total phosphorous removal efficiency can be more than 90%, and discharged water can meet the qualifications of GB8978-1996 national sewage discharge standard. The system is low in project and operation costs and less in accommodation area, can realize automatically controlling of operation, and is adaptable to domestic sewage treatment of relatively concentrated discharge at towns and villages and scenic spots.

Description

technical field [0001] The invention relates to sewage treatment, in particular to a high-load tower-type earthworm ecological filter tank, which can be used for the treatment of relatively concentrated discharge of domestic sewage in vast villages, towns and tourist attractions. Background technique [0002] At present, the application of enhanced ecological technology in the land treatment system has become a hot spot in the field of sewage treatment research and application in the world, but the research is in its infancy in general. The tower-type earthworm ecological filter system mentioned in the present invention is exactly a kind of land treatment system using enhanced ecological technology. It is based on the ecological functions such as earthworms have swallowing organic matter, improving soil ventilation and water permeability, and synergy between earthworms and microorganisms. A multi-layer and multi-stage water distribution ecological sewage treatment system is ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/32
CPCC02F3/06C02F3/327Y02W10/10
Inventor 郑正李军状罗兴章杨世关张继彪李继红申荣艳冯景伟李培培陈广银方彩霞王为平邹星星
Owner NANJING UNIV
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