Method and system for combined air stripping biogas slurry depth treatment and biogas purification and desulfurization

An advanced treatment, biogas slurry technology, applied in chemical instruments and methods, degassed water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of strict control conditions, high operating costs, secondary pollution, etc. The effect of reducing operating costs, reducing pH and hardness, and improving stripping efficiency

Active Publication Date: 2013-02-27
CHINA AGRI UNIV
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Problems solved by technology

Its desulfurization methods are generally divided into biological methods and physical and chemical methods. Among them, the biological method has attracted wide attention due to its simple equipment, low energy consumption, and less second

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  • Method and system for combined air stripping biogas slurry depth treatment and biogas purification and desulfurization

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Embodiment Construction

[0041] Below, the specific implementation method of the present invention will be further described in detail in conjunction with the accompanying drawings.

[0042] A method for combining advanced treatment of biogas slurry with stripping and biogas purification and desulfurization, including the following steps: stripping and absorbing ammonia gas, killing fecal E. The automatic control of the relevant components in the system realizes the advanced treatment of combined blowing biogas slurry and biogas purification and desulfurization.

[0043] The present invention can work in the mode of intermittent feeding or continuous feeding, and the automatic control device 1 issues instructions to realize the automatic control of the whole system. Among them, the automatic control device 1 automatically controls the first solenoid valve 3, the electric stirring device 5, the additive automatic metering and dispensing device 6, the air pump 7, the second liquid pump 10, the first thr...

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Abstract

The invention belongs to the technical field of waste water multilevel processing and particularly relates to a method and a system for combined air stripping biogas slurry depth treatment and biogas purification and desulfurization. Under the regulation of an additive, high-concentration ammonia nitrogen in the biogas slurry is removed by recycle gas through an air stripping mode, the gas after the air stripping is absorbed through acid liquid and serves as ammonium fertilizer to be applied, the use added value of the biogas slurry is improved, the system operation cost is reduced, the additive is added in an air stripping device, phosphorus and organic matters in the biogas slurry are subjected to flocculating settling, and the biogas slurry serves as slow release fertilizer to be applied after being collected and processed. Fecal coliform in the biogas slurry is eliminated effectively, the waste heat is used for heating the air stripping device, the air stripping efficiency of ammonia nitrogen is improved, and the optimized use of the system heat is improved. The biogas slurry after air stripping and sterilization is directly used for absorbing hydrogen sulfide and carbon dioxide in biogas, the biogas purification and desulfurization can be achieved, and the potential of hydrogen (PH) and the hardness of the processed biogas slurry can be reduced.

Description

technical field [0001] The invention belongs to the technical field of multi-stage treatment of waste water, and in particular relates to a method and a system for combining advanced treatment of blowing biogas liquid and biogas purification and desulfurization. Background technique [0002] The use of anaerobic fermentation biogas technology to treat livestock and poultry waste, crop straw, domestic waste and other organic waste can not only control environmental pollution, but also realize the resource utilization of waste, and achieve better energy, environmental protection and economic benefits. benefit. In recent years, my country's large and medium-sized biogas projects have experienced an unprecedented growth momentum, but the advanced disposal of anaerobic fermentation liquid after biogas production is still a worry. As far as the actual situation in our country is concerned, the anaerobic fermentation liquid produced by large and medium-sized biogas projects is lar...

Claims

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Application Information

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IPC IPC(8): C10L3/10C02F9/10C01C1/12C02F1/66C02F1/20C02F1/52C02F5/00
CPCY02E50/343Y02E50/30Y02P20/129
Inventor 董仁杰吴树彪刘良金明军
Owner CHINA AGRI UNIV
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