Rural domestic wastewater treatment device and method based on MBBR coupling anaerobic-aerobic process integration

A technology for domestic waste water and treatment device, which is applied in the fields of environmental technology and water treatment, and can solve the problems that the versatility, high efficiency, stability and economic rationality of biochemical processes are difficult to meet the continuous improvement.

Pending Publication Date: 2021-07-30
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] With the increasing emphasis of human beings on environmental protection, the sharp increase in the discharge of rural domestic wastewater, and the increasingly stringent requirements of the country on sewage treatment, countries around the world, including my country, have proposed m

Method used

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  • Rural domestic wastewater treatment device and method based on MBBR coupling anaerobic-aerobic process integration
  • Rural domestic wastewater treatment device and method based on MBBR coupling anaerobic-aerobic process integration
  • Rural domestic wastewater treatment device and method based on MBBR coupling anaerobic-aerobic process integration

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Effect test

Embodiment 1

[0028] Wastewater treatment object is NH4 + -N concentration is 200mg / L, SO 4 2- - Wastewater with S concentration of 100mg / L, TOC concentration of 200mg / L, and TP-P concentration of 80mg / L. The initial pH was -7.0.

[0029] The reflux ratio is controlled at reflux / outlet water=3:1, the hydraulic retention time of each chamber is controlled at 12-36h, and the operating temperature of the system is controlled at 25±5°C.

[0030] The result is as figure 2 As shown, the system has a high removal efficiency for TOC, which can basically reach more than 90%. The removal efficiency of TN and TP shows a fluctuating trend, but with the enrichment of bacteria, the efficiency gradually increases. Such as image 3 It was shown that after the reflux was started, the denitrification efficiency was greatly improved, and with the increase of HRT and the enhancement of aeration intensity, the denitrification efficiency was further improved. Such as Figure 4 As shown, in the MBBR aerob...

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Abstract

The invention discloses a rural domestic wastewater treatment device based on MBBR coupling anaerobic-aerobic process integration. The device comprises an MBBR anaerobic chamber, an MBBR anoxic chamber and an MBBR aerobic chamber, a large amount of anaerobic bacteria are enriched in the MBBR anaerobic chamber for anaerobic hydrolysis, wastewater enters the device, a large amount of sulfur autotrophic denitrifying bacteria are enriched in the MBBR anoxic chamber for denitrification, and a large amount of nitrifying bacteria and phosphorus phagocytosis bacteria are enriched in the MBBR aerobic chamber. Gravity curved screens and sedimentation tanks are additionally arranged at the water outlet tail ends of the anaerobic tank and the aerobic tank, so that the flow of MBBR filler and activated sludge is ensured, the defect that the biological population ecology is influenced by drifting of suspended filler in different stages in the MBBR is overcome, and the nitrogen and phosphorus removal efficiency is improved. The system not only retains the advantages of large specific surface area and high efficiency of the MBBR, but also can greatly reduce the generation of excess sludge, and can realize regulation and control of nitrogen and phosphorus indexes of rural domestic wastewater.

Description

technical field [0001] The invention relates to a rural domestic wastewater treatment device and method based on MBBR coupled anaerobic-aerobic process integration, belonging to the field of environmental technology and water treatment. Background technique [0002] With the increasing emphasis of human beings on environmental protection, the sharp increase in the discharge of rural domestic wastewater, and the increasingly stringent requirements of the country on sewage treatment, countries around the world, including my country, have proposed more and more standards for sewage treatment rates and sewage treatment. The traditional biochemical process has been difficult to meet the ever-increasing requirements in terms of processing versatility, high efficiency, stability and economic rationality. [0003] MBBR (Moving-Bed Biofilm Reactor, moving bed biofilm reactor) is a new type of biofilm reactor, which is an improvement developed on the basis of fixed bed reactor, fluidiz...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/12C02F3/28
CPCC02F3/302C02F3/1268C02F3/2853C02F2209/44C02F2209/02Y02W10/10
Inventor 李中坚武高明张兴旺杨彬雷乐成
Owner ZHEJIANG UNIV
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