Nitrogen and phosphorus removal agent for sewage and preparation method thereof

Abstract

The invention discloses a nitrogen and phosphorus removal agent for sewage and a preparation method thereof. The preparation method comprises the following steps: S1, selection of raw materials: selecting a calcium salt, an iron salt, an aluminum salt, polyaluminum ferric chloride and polyaluminum sulfate as raw materials; S2, weighing of the raw materials: selecting a ratio of the calcium salt tothe iron salt to the aluminum salt to polyaluminium ferric chloride to polyaluminum sulfate to denitrifying bacteria of 2: 2: 2: 1: 1: 1, putting the raw materials in a dry and clean container for weighing; and S3, mixing of the material: putting each of the raw materials which have been proportioned according to the above ratio into a dry and crystalline container for mixing. Compared with othertreatment processes, the preparation method of the invention has the following advantages: process is mature; the calcium, iron and aluminum salts can chemically react with phosphorus and nitrogen inthe sewage effectively, thereby forming a large amount of hydroxide floc precipitates; at the same time, polyaluminum ferric chloride and polyaluminum sulfate can accelerate the chemical reaction with nitrogen and phosphorus in the sewage, so a flocculation and sedimentation speed is fast, and the agent is non-corrosive to pipeline equipment and has obvious water purification effect.

Description

technical field [0001] The invention relates to the technical field of sewage biochemical treatment, in particular to a sewage nitrogen and phosphorus removal agent and a preparation method thereof. Background technique [0002] The wastewater discharged by enterprises in chemical parks has complex water quality, containing a large amount of ammonia nitrogen and phosphorus, the water quality fluctuates greatly, there are many refractory substances (COD), and the biodegradability is extremely poor. Because the original nitrogen and phosphorus removal treatment facilities or treatment processes are simple and imperfect, there are many problems, and it is difficult to meet the needs of nitrogen and phosphorus-containing wastewater treatment in chemical industry parks. At present, the sewage treatment plants in the chemical industry park in the Taihu Lake Basin are mainly upgraded from the aspects of secondary intensified treatment, chemical synergistic phosphorus removal, and a...

AI Technical Summary

Problems solved by technology

The traditional chemical sedimentation method is inefficient in denitrification and phosphorus removal, and sometimes cannot complete the denitrification and phosphorus removal of sewage at one time, which increases economic expenditure and is not conducive to the development of enterprises