Fixed bed biofilm inclusive type microelectrolysis deep nitrogen and phosphorus removal cabin

Abstract

The invention provides a fixed bed biofilm inclusive type microelectrolysis deep nitrogen and phosphorus removal cabin. The fixed bed biofilm inclusive type microelectrolysis deep nitrogen and phosphorus removal cabin comprises a buried cabin body; the cabin body is of a hollow tubular enclosure bulkhead structure, and the top part of the cabin body is opened; a plurality of fixed bed biofilm pipes are vertically and tightly arranged in the inner part of the cabin body; the fixed bed biofilm pipe is of a hollow tubular structure; a plurality of micropores are formed in the pipe wall of the fixed bed biofilm pipe; a microelectrolysis filler is arranged in the fixed bed biofilm pipe; the metal ion is slowly released through microelectrolysis, phosphate in the sewage and the metal ion are combined and form a precipitate, moreover, the microelectrolysis material consumes oxygen in a water body, reduces the dissolved oxygen in the cabin and is favorable for nitrogen removal by anoxic denitrification. The microelectrolysis and the biofilm structure are combined to remove nitrogen and slowly release and remove phosphorus at the same time, the effect on deep treatment of decentralized sewage in the rural area is excellent, the indicator of the effluent is effectively increased; moreover, the sustained release effect is excellent, the manpower and the maintenance cost are reduced, and the popularization and the application of the sewage treatment in the rural area are facilitated.

Description

technical field [0001] The invention relates to water treatment, in particular to a fixed-bed biofilm containing micro-electrolysis deep denitrification and dephosphorization chamber. Background technique [0002] Domestic sewage often contains a large amount of phosphorus, which will cause excessive algae reproduction when discharged into the water, resulting in eutrophication of the water body and deterioration of water quality. In domestic sewage, 80% of phosphorus comes from human excretion, and the rest comes from washing wastewater and food waste. Among them, phosphorus-containing washing powder is the main source of domestic phosphorus-containing sewage. Phosphorus is a key nutrient that causes water eutrophication. The eutrophication of the water body will not only lead to the rapid growth of algae in the water, but also cause a sharp drop in the oxygen content of the water body, affecting the survival of aquatic organisms such as fish. Eutrophication of water bod...

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Problems solved by technology

Distributed pollution point sources such as rural domestic sewage involve a wide range, scattered distribution, relatively strong randomness, large changes in water quality and quantity, and complex sewage components

Most of the existing rural scattered domestic sewage treatment equipment adopts the anoxic-aerobic (AO) process. On the one hand, the biological phosphorus removal effect is very small, and the phosphorus in the effluent is difficult to meet the standard; the existing technology also uses the electrolytic phosphorus removal process to ensure Phosphorus in the effluent discharges up to the standard, but it is suitable for small equipment. The energy consumption above 5T / d is very high, and the loss of the electrode plate is serious, so it is not suitable for use; The release time cannot be predicted. Generally, additional storage tanks and metering pumps are required, and an additional worker is required to maintain equipment and prepare pharmaceuticals every day. For the characteristics of wide distribution and long distances in rural areas, such maintenance will bring additional equipment costs. and manpower maintenance costs; on the other hand, in the traditional dosing process, although the reaction is quick, it cannot be sustained, and manual or equipment continuous dosing is required, which is not suitable for distributed small sewage treatment systems in rural areas, and suspended solids, total Phosphorus, floating oil, chromaticity and other indicators cannot stably meet the national water treatment standards, and advanced water quality treatment cannot be achieved; although the sewage treatment system with reverse osmosis membrane structure has good treatment effect, the construction cost is high. The treatment system has a small processing capacity and adopts an underground structure. At present, the domestic buried structures mainly include prefabricated concrete tanks, glass steel tanks, and carbon steel tanks; among them, prefabricated concrete tanks have poor corrosion resistance due to long construction periods It is not suitable for rural sewage treatment due to the shortcomings of leakage and easy pollution of water bodies; FRP tanks have poor rigidity, variability, poor long-term temperature resistance, and low anti-aging performance. The production process is not environmentally friendly, causing secondary environmental pollution and dangerous Human health; due to low strength and poor corrosion resistance, carbon steel tanks cannot meet the structural requirements of buried equipment for rural domestic sewage; there is an urgent need for a new type of deep dephosphorization and denitrification equipment or technology suitable for rural decentralized

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