Quick starting process of biofilm reactor in oligotrophic habitat

A biofilm reactor and rapid start-up technology, applied in the direction of sustainable biological treatment, biological water/sewage treatment, chemical instruments and methods, etc., can solve the impact on ecological security and human health, and aggravate the methemoglobin disease of chlorinated disinfection by-products and other problems, to achieve the effect of endowing steady-state operation performance, fast start-up, and strong adaptability

Active Publication Date: 2010-10-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Numerous studies have shown that excessive organic matter and "tri-nitrogen" in drinking water source water will aggravate the formation of chlorinated disinfection by-products and cause methemoglobinemia, gastrointestinal cancer and other diseases, seriously affecting ecological security and human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) 5 strings of TA-II elastic three-dimensional fillers with a volume filling rate of 2% are arranged in a 90L simulated river biofilm reactor. Each string of fillers is composed of 13 pieces in series, with a diameter of 20cm, a height of 26cm, and a specific surface area of ​​216m 2 / m 3 ;

[0016] 2) Two aeration sand tables are arranged at the bottom of the biofilm reactor, and the intermittent aeration is controlled by a time-controlled switch;

[0017] 3) Take the bottom sediment from the water intakes of Luoshe, Zhongguan and Pingyao in the Hangjiahu area, and pass through the No. 5 sieve with an aperture of 4mm and the No. 8 sieve with a pore size of 2.5mm to remove snails, mussels, aquatic plants and animals. , mix the pretreated bottom sludge retrieved from Luoshe, Zhongguan and Pingyao with a volume ratio of 2.5:3.0:4.5 to form an inoculation sludge, and finally lay 3L of inoculation sludge on the bottom of the biofilm reactor;

[0018] 4) The biofilm react...

Embodiment 2

[0023] 1) 7 strings of TA-II elastic three-dimensional fillers with a volume filling rate of 3% are arranged in a 90L simulated river biofilm reactor. Each string of fillers is composed of 15 pieces in series, with a diameter of 20cm, a height of 28cm, and a specific surface area of ​​216m 2 / m 3 ;

[0024] 2) Four aeration sand tables are arranged at the bottom of the biofilm reactor, and the intermittent aeration is controlled by a time-controlled switch;

[0025] 3) Take the bottom sediment from the water intakes of Luoshe, Zhongguan and Pingyao in the Hangjiahu area, and pass through the No. 5 sieve with an aperture of 4mm and the No. 8 sieve with a pore size of 2.5mm to remove snails, mussels, aquatic plants and animals. , the pretreated bottom sludge retrieved from Luoshe, Zhongguan and Pingyao was mixed into inoculation sludge with a volume ratio of 2.5:3.0:4.5, and 5L of inoculation sludge was finally laid on the bottom of the biofilm reactor;

[0026] 4) The biofilm...

Embodiment 3

[0031] 1) 6 strings of TA-II elastic three-dimensional fillers with a volume filling rate of 2.33% are arranged in a 90L simulated river biofilm reactor. Each string of fillers is composed of 14 pieces in series, with a diameter of 20cm, a height of 27cm, and a specific surface area of ​​216m 2 / m 3 ;

[0032] 2) Three aeration sand tables are arranged at the bottom of the biofilm reactor, and the intermittent aeration is controlled by a time-controlled switch;

[0033] 3) Take the bottom sediment from the water intakes of Luoshe, Zhongguan and Pingyao in the Hangjiahu area, and pass through the No. 5 sieve with an aperture of 4mm and the No. 8 sieve with a pore size of 2.5mm to remove snails, mussels, aquatic plants and animals. , mix the pretreated bottom sludge retrieved from Luoshe, Zhongguan and Pingyao with a volume ratio of 2.5:3.0:4.5 to form inoculation sludge, and finally lay 4L of inoculation sludge at the bottom of the biofilm reactor;

[0034] 4) The biofilm rea...

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Abstract

The invention discloses a quick starting process of a biofilm reactor in an oligotrophic habitat, which comprises the following steps: (1) distributing 5-7 strings of elastic three-dimensional filler with the volume filling rate of 2-3 percent in a 90L of biofilm reactor and distributing 2-4 aeration sand tables at the bottom of the biofilm reactor; (2) pretreating substrate sludge of riverways of three potable water sources, mixing the substrate sludge according to the volume ratio of 2.5:3.0:4.5 to form inoculated sludge and paving 3-5L of the inoculated sludge at the bottom of the reactor; (3) filling sewage into the reactor, tightly sealing and aerating at the aeration amount of 240-260L/h for 2-3 days and completely draining the inoculated substrate sludge along the effluent; and (4) under the condition of intermittent of aeration for 3h and aeration stop for 3h, increasing the water-feeding flow of the reactor from 15ml/min to 30ml/min every fiver days at the increase speed of 4-6ml and finally continuously operating at the flow speed of 25-35ml/min for 2-3months. Compared with the prior art, the invention has the beneficial effects that: (1) quick starting of an aquatic film repairing system in a micro-polluted water source can be realized; and (2) a biofilm system has high operation performance in a stable state.

Description

technical field [0001] The invention relates to a rapid start-up process of a biofilm reactor in an oligotrophic habitat. Background technique [0002] In recent years, with the rapid development of my country's social economy, urban and rural drinking water sources have been polluted to varying degrees. Nitrogen, phosphorus and organic pollutants generally exceed the Class III standard in the "Environmental Quality Standards for Surface Water" (GB3838-2002). Numerous studies have shown that excessive organic matter and "tri-nitrogen" in drinking water source water will aggravate the formation of chlorinated disinfection by-products and cause methemoglobinemia, gastrointestinal cancer and other diseases, seriously affecting ecological security and human health. [0003] Biofilm method is a widely used sewage (waste) water biological treatment and water plant pretreatment technology at home and abroad. It has great application potential in view of the low concentration of org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 徐向阳徐京朱亮
Owner ZHEJIANG UNIV
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