Biological complex enzyme for sludge recycling and use method thereof

Abstract

The invention discloses a biological complex enzyme for sludge recycling and a use method thereof. The biological complex enzyme for sludge recycling is broad spectrum complex enzyme extracted from dozens of North American native natural plants. The sludge treated with the biological complex enzyme is dehydrated, mixed with humus earth for pelletizing and desiccated to obtain complex soil, and the soil not only can cure heavy metal and organic pollutants but also can be used as basis material of various facilities such as roof, rainwater garden, ecological water drainage system and the like, so that the sludge treatment problem of the sewage treatment plant is effectively solved.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a biological compound enzyme for recycling sludge and a use method thereof. Background technique [0002] The sludge produced by urban sewage treatment plants has a high water content (75-99%), and is unstable, easily corrupted, and has a foul smell. Sludge contains organic matter, nitrogen, phosphorus, potassium and various trace elements, pathogenic substances such as parasite eggs and pathogenic microorganisms, heavy metals such as copper, zinc and chromium, and refractory and toxic substances such as polychlorinated biphenyls and dioxins. Hazardous substances, if not handled properly, can easily cause secondary pollution. [0003] A large amount of sludge produced by urban sewage treatment plants requires a large amount of infrastructure investment and high operating costs through conventional sludge treatment and disposal processes such as sedimentation, separation,...

AI Technical Summary

Problems solved by technology

[0017] In general composting is a stable and hygienic product, but large-scale sludge composting has many limitations:

[0018] (1) Sludge itself is not a very good compost material, with poor degradability, low porosity, and high moisture content. A large amount of conditioner must be added to loosen the sludge, and the amount of composted sludge is relatively low (after composting treatment Most of them are heavy conditioners), not suitable for rainy southern regions

[0019] (2) The composting process does not achieve volume reduction, and the processing, storage, and buffer areas occupy a large area

[0020] (3) The odor treatment process is complicated and the system is huge

For the rainy climate in the south, the requirements for storage and composting sites and facilities are high, which also increases investment

[0021] (4) High operating costs: high power consumption for oxygen supply, ventilation and odor treatment, large chemical dosage for deworming, purchase of a large amount of fluffy conditioner, high transportation and storage costs

However, its disadvantage is that the investment in treatment facilities is large, the treatment cost is high, and secondary pollution may occur (exhaust gas, noise, vibration, heat and radiation)

In particular, direct incineration of undried sludge is not only very difficult, but also extremely uneconomical in terms of energy consumption

[0025] The investment and operating costs of sludge incineration are higher than those of drying / granulation, because: the operating temperature of incineration is high (850°C for incineration, 100°C for drying); emission limits, high final secondary waste landfill costs)

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