Device for reducing excess sludge output by using predator

Abstract

The invention discloses a mud and effluent disposing device through biological predator, which comprises the following parts separated by baffle (14) in the device: microbe growing region, mud separating region (6) and hypoxic region (7), wherein the bottom of microbe growing region possesses pipe-typed aerator (9) within deflector (13); the filler is filled between deflector (13) and baffle (14); the microbe growing region connects mud separating region (6) through hole on the baffle (14); the mud separating region (6) connects hypoxic region (7) through pipe (10). The invention removes organics and mud in the effluent, which is benefit to decrease phosphor.

Description

technical field [0001] The invention relates to a device for treating sewage and sludge by using biological technology, in particular to a device for reducing excess sludge by using biological predation. Background technique [0002] Activated sludge method is the most widely used sewage biological treatment method today, but at the same time, a large amount of residual sludge is produced by-product. At present, the treatment and disposal costs of excess sludge account for 25% to 40% of the total operating costs of sewage treatment plants. Production will increase dramatically. Therefore, how to reasonably solve the sludge problem has become one of the current environmental protection problems to be solved urgently. [0003] Sludge treatment and disposal is to use appropriate technical measures to make sludge reuse or return to the natural environment in a form that does not damage the environment. At present, the commonly used surplus sludge treatment methods are sludge ...

AI Technical Summary

Problems solved by technology

However, there are the following problems in practical application: the uncoupling agent cast is degraded due to the domestication of microorganisms after a long time, thus losing the uncoupling effect; after adding the uncoupling agent, more oxygen is needed to deoxidize The organic matter that cannot be converted into sludge increases the oxygen supply; the cost of adding an uncoupling agent is expensive, and the concentration that needs to be maintained in the sewage is 4-80 mg / l, which is an astonishing amount; the uncoupling agent is usually Compounds that are difficult to biodegrade or have high toxicity to organisms have environmental safety problems

In the conventional activated sludge process, micro-animals and bacteria coexist in the aeration tank, and the operating conditions of the aeration tank are mainly conducive to bacteria and other microorganisms to swallow organic matter, which is not completely suitable for the growth of higher micro-animals that can prey on bacteria. The sludge reduction effect is not obvious

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