Kitchen wastewater treatment method

Abstract

The invention discloses a kitchen wastewater treatment method which comprises the following steps: 1, chemical phosphorus removal is performed on kitchen wastewater flowing out from an IC (internal circulation) reactor; 2, after passing through a water quality equalization tank, the wastewater enters a CASS (Cyclic Activated Sludge System) to react, so that soluble substrates, organisms, phosphorus and an synchronous nitrification and denitrification effect are removed; 3, after the wastewater flows into an intermediate water tank to be subjected to volume regulation, the wastewater enters a Fenton oxidation reactor and an iron-carbon micro-electrolysis device so as to improve biodegradability of the wastewater; 4, after passing through the Fenton oxidation reactor and the iron-carbon micro-electrolysis device, the wastewater directly enters a hydrolysis acidification pool from the intermediate water tank, suspended matter and iron ions are removed and sludge is separated, hydrolyzed and acidified; 5, the wastewater is subjected to aerated oxidation to remove COD (Chemical Oxygen Demand) content; 6, the wastewater enters an MBR (Meane Biological Reactor) pool and hardly degradable substances are degraded, so that the drained wastewater reaches the take-over standard of a sewage treatment plant; 7, after the sludge discharged from a chemical phosphorus removal pool and the MBR pool is processed by a precision solid-liquid separator, solids are prepared into an organic fertilizer and filter-pressing liquid enters the water quality equalization tank.

Description

technical field [0001] The invention relates to a treatment method for kitchen waste water. Background technique [0002] With the development of social economy, the number and scale of restaurants, guesthouses, hotels and canteens are increasing day by day, and the amount of catering waste water produced is increasing. According to incomplete statistics, the untreated waste water discharged by the catering industry in my country every year Wastewater amounts to hundreds of millions of tons, and presents a growing trend. According to other data reports, the discharge of catering wastewater accounts for about 3% of urban domestic sewage discharge, but its BOD 5 and COD Cr The content accounts for 1 / 3 of the total load. It can be seen that catering wastewater is a high-concentration pollution source and one of the main reasons for the pollution of water bodies around cities. At the same time, due to its complex composition, high organic content, poor biochemical properties,...

AI Technical Summary

Problems solved by technology

At the same time, due to its complex composition, high organic content, poor biochemical properties, and high salt content, it is difficult to degrade the organic components and ammonia nitrogen in the wastewater by ordinary biochemical methods, and it has become a major problem to meet the treatment standards.

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