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Optimized CAST domestic sewage sludge reduction control system and working method

A control system and domestic sewage technology, applied in the direction of control/regulation system, non-electric variable control, liquid level control, etc., can solve the abnormal phenomenon that there is no research on the control of sludge concentration reduction, the inability to deal with the reduction of sludge concentration, and the inability to apply and other problems, to achieve the effect of convenient and quick regulation of the operating system, reduction of sludge, and improvement of operational stability

Inactive Publication Date: 2014-10-22
杨安康 +2
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Problems solved by technology

The advantage of this control method is that it is relatively simple to implement and easy to maintain. The disadvantage is that the control is not very flexible and cannot be applied to abnormal phenomena.
Moreover, in the classic CAST process, the sludge concentration increases continuously with the water treatment process, so there is no research on the control of sludge concentration reduction, so its PID control system cannot handle the situation of sludge concentration reduction

Method used

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  • Optimized CAST domestic sewage sludge reduction control system and working method
  • Optimized CAST domestic sewage sludge reduction control system and working method
  • Optimized CAST domestic sewage sludge reduction control system and working method

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Embodiment Construction

[0029] In order to make the purpose, technical solution and advantages of the invention clearer, the invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the invention, not to limit the invention.

[0030] The invention is based on the practical research of sludge reduction in a sewage treatment plant using the CAST process to treat domestic sewage. like figure 2 As shown, the CAST control system includes a water inlet tank 1, a reaction tank 3 and a water outlet tank 6 connected in sequence by pipelines. A sewage lifting pump 2 is arranged between the water inlet tank 1 and the reaction tank 3 . The CAST reaction pool is divided into two areas, A and B: A is the biological selection area, and B is the main reaction area. The volume ratio of the two areas is about 1:5~1:7. In this embodiment, it is preferably 1:6.

[00...

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Abstract

The invention relates to an optimized CAST domestic sewage sludge reduction control system and a working method. Through arrangement of a main control computer and a control device, high automation of the CAST system is realized, and the purpose of sludge reduction in the domestic sewage processing process can be realized through adjusting technological parameters. The control system of the invention can not only handle parameter arrangement when the sludge concentration rises but also handle parameter arrangement when sludge in a reaction pool is reduced, and the sludge amount and the sludge concentration in the reaction pool can be in a balanced and stable level.

Description

technical field [0001] The invention relates to the field of domestic sewage sludge reduction treatment, in particular to a CAST control system and a working method thereof. Background technique [0002] The activated sludge process is currently the most widely used sewage treatment technology at home and abroad. In addition to the removal of nitrogen and phosphorus, the conventional activated sludge process is not easy to meet the discharge standards, and another major disadvantage is the large output of residual sludge. The treatment and disposal of a large amount of surplus activated sludge produced in the process of sewage biological treatment requires steps such as separation, stabilization, dehydration, digestion, and transfer to landfill or incineration, which requires a large amount of capital investment and high operating costs. Management costs; from sludge treatment to final disposal, the required cost is about 40% (drying) to 65% (incineration) of the total oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D9/12
Inventor 余冉李传扬苏文强杨安康
Owner 杨安康
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