Slow-release coprecipitated phosphate-removing module and buried phosphate-removing cabin

Abstract

The invention provides a slow-release coprecipitated phosphate-removing module, which comprises several vertically and tightly-arranged fixed bed biomembrane pipes and slow-release tablets; several slow-release tablets are placed at one side of the fixed bed biomembrane pipes in a string mode; the fixed bed biomembrane pipe is of a hollow tubular structure; a plurality of micropores are formed inthe pipe wall of the fixed bed biomembrane pipe; a microelectrolysis filler is arranged in the fixed bed biomembrane pipe; and a slow release channel is formed by the adjacent spaced-apart fixed bed biomembrane pipes placed with the microelectrolysis filler. The invention also relates to a slow-release coprecipitated buried phosphate-removing cabin. The microelectrolysis and the slow-release tablets are combined for realzing co-deposition, phosphate removing can be efficiently realized for a long time, the phosphate-removing effect is uniformly dispersed to every corner in the module, the effect on deep treatment of decentralized sewage in the rural area is excellent, and 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 slow-release co-precipitation phosphorus removal module and an underground phosphorus removal cabin. 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 bo...

AI Technical Summary

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, chroma and other indicators cannot 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. system, the processing capacity is not large, and the buried structure is adopted. At present, the domestic buried structures mainly include prefabricated concrete tanks, glass steel tanks, and carbon steel tanks. The disadvantage of easy pollution to water is not suitable for rural sewage treatment; FRP tanks are poor in rigidity, variability, poor long-term temperature resistance, and low anti-aging performance. The production process is not environmentally friendly, causing secondary pollution to the environment and endangering human health; Due to low strength and poor corrosion resistance, carbon steel tanks are not suitable for buried rural sewage treatment environments; a new type of deep phosphorus removal structure suitable for rural decentralized structures is urgently needed

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