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A sewage treatment system and its operating method

A sewage treatment system and sewage technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc. Strong adaptability, promoting growth and avoiding membrane fouling

Active Publication Date: 2016-10-05
YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because there is no sludge carrier in this method, the enriched nitrifying bacteria are in a free state, which can easily cause membrane pore blockage and membrane surface pollution, making it difficult to carry out production practice.

Method used

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  • A sewage treatment system and its operating method
  • A sewage treatment system and its operating method
  • A sewage treatment system and its operating method

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Embodiment 1

[0055] A chemical pharmaceutical company uses organic and inorganic raw materials to prepare drugs and drug intermediates through chemical reactions. The production process and domestic sewage discharge of the factory area are about 2,000 tons / d. The water quality is shown in Table 1.

[0056] The wastewater treatment adopts the "aerobic-anaerobic-SBR (sequential batch activated sludge process)" process. Due to the high concentration of organic matter in the wastewater, high salinity, great changes in pH value, and relatively single components of pharmaceutical wastewater, even some The raw materials or products are biologically toxic, or difficult to be biodegraded, and the seasonal production-stop cycle changes are more obvious, and nitrification inactivation or system restart often occurs. Due to the inhibitory effect of the high salt and high toxicity of wastewater on the proliferation of nitrifying bacteria, it is difficult to adapt to the short-term adaptation of adding p...

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Abstract

The invention discloses a sewage treatment system and an operation method thereof. The sewage treatment system comprises an aeration tank capable of providing activated nitrifying bacteria flora activated sludge and a sewage activated nitrifying bacteria flora isolating and tamming concentration system, wherein the sewage activated nitrifying bacteria flora isolating and tamming concentration system comprises a first pH tester, a cyclone separator, a water inlet mechanism, a membrane bioreactor, a controller and a backflow mechanism; the first pH tester is used for monitoring and detecting the pH value of incoming water of the sewage treatment system; the cyclone separator is used for separating and removing inert substances in activated sludge mixed liquid of the aeration tank and comprises a shell and an internal stirring mechanism, and the bottom of the shell is connected to a sludge discharge mechanism through a pipeline; the water inlet is arranged between the aeration tank and the cyclone separator; the membrane bioreactor is used for intercepting and concentrating activated nitrifying bacteria floras, and is communicated with a liquid-phase outlet of the cyclone separator; the controller is used for receiving monitor signals and controlling the operation of the water inlet mechanism, the cyclone separator and the sludge discharge mechanism; the backflow mechanism is used for sending the concentrated activated nitrifying bacteria floras back to the aeration tank. The sewage treatment system disclosed by the invention can resume production quickly after the loss of a nitrifying function suddenly occurs.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a sewage treatment system and an operation method thereof. Background technique [0002] Conventional biological denitrification mainly depends on the nitrification of nitrifying bacteria and the denitrification of denitrifying bacteria. There are many factors that affect biological nitrogen removal, the main factors include pH, temperature, dissolved oxygen, carbon-nitrogen ratio, circulation ratio, sludge age, redox potential, inhibitory substances, etc. [0003] Nitrifying bacteria belong to autotrophic bacteria, including two completely different metabolic groups: nitrosomonas and nitrobacter, including bacilli, cocci and spirochetes with different shapes. Nitrosobacilli include bacteria in the genera Nitrosomonas, Nitrosococcus, Nitrospirilla, and Nitrosolobus; Nitrobacter include bacteria in the genera Nitrobacter, Nitrococcus, and Nitrosomyces. Nitrifying bacteria are che...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 范举红刘锐陈吕军
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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