A flocculant for slaughter wastewater

Abstract

The invention relates to the technical field of wastewater treatment, particularly a flocculant for slaughter wastewater, which is composed of the following components in parts by weight: 8-15 parts of polyaluminium chloride-polyacrylamide, 12-25 parts of polyphosphate, 5-10 parts of polyaluminum ferric chlorosulfate, 8-12 parts of polyaluminum silicate sulfate and 10-20 parts of lignosulphonate. The flocculant has the characteristics of high efficiency and broad spectrum, can adapt to a wide pH value range of water quality, and has favorable effects within the pH value range of 3-11; the removal rate of grease and SS (suspended sediment) is higher than 93.69%, and is 96.82% at the maximum; the removal rate of COD (chemical oxygen demand) is higher than 91.28%, and is 94.38% at the maximum; the removal rate of BOD (biochemical oxygen demand) is higher than 91.65%, and is 95.29% at the maximum; and thus, the flocculant has obvious flocculation effect on slaughter wastewater, and is simple to prepare.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a flocculant for slaughter wastewater. Background technique [0002] Slaughter wastewater comes from pen washing, leaching, slaughter and other factory floor washing, scalding, dissection, non-staple food processing, oil washing, etc. Through its water quality source, we can know that the wastewater mainly contains blood, grease, minced meat, bone residue, hair and feces, etc. The wastewater is brownish red and has a strong stench. The content of organic suspended matter is high and it is easy to be corrupted. Discharging into water will consume dissolved oxygen in water, destroy the ecosystem and pollute the environment. [0003] In the process of slaughtering and meat processing, a large amount of water is consumed, and at the same time, waste water containing polluting substances such as blood, grease, hair, meat scraps, livestock and poultry offal, undigested fo...

AI Technical Summary

Problems solved by technology

[0005] The suspended solids SS in slaughter wastewater is as high as 1000mg / L, which belongs to perishable organic matter, which will affect the COD and BOD of wastewater and cause water quality to deteriorate

[0006] Slaughter wastewater enters the biochemical stage after pretreatment, during which it is necessary to add flocculants to flocculate and settle the suspended particles in the wastewater to achieve the purpose of separating from water and improve water quality. However, the flocculant flocculation effect currently used for slaughter wastewater cannot achieve the expected effect

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