用微生物絮凝剂改善污泥沉降性能（With the improvement of sludge sedimentation performance of microbial flocculant）.docVIP

用微生物絮凝剂改善污泥沉降性能（With the improvement of sludge sedimentation performance of microbial flocculant） The microbial flocculant can improve the settling property of sludge. Microbial flocculant can effectively improve the settling property of activated sludge, prevent sludge from cracking and improve the treatment efficiency. Such as adding flocculant isolated from Rhodobon in erythropolis to have activated sludge bulking in the sludge after treatment with SVI (sludge volume index) decreased from 290 to 50, Ma Xichen of the Dalian Light Industry Institute used activated sludge microbial flocculant MF processing has been expanded, the sludge after treatment with SVI (sludge volume index) from 281 down to 54, treatment rate of 80.8%. But adding flocculation microorganisms in activated sludge can promote the settlement of sludge, and will not reduce the removal efficiency of organic matter. Microbial flocculants are metabolites of various functional proteins and functional polysaccharide substances produced by microorganisms or their secretions, it is the use of microbial technology, obtained by bacteria and fungi, fermentation, extraction, purification, water treatment agent is biodegradable and safety, non-toxic, no efficient two pollution. Because microbial flocculants can overcome the inherent defects of inorganic polymers and synthetic organic polymer flocculants, and ultimately achieve pollution-free emissions, it is called microbial flocculant. The molecular weight, molecular structure and shape of flocculants and their groups have influence on the activity of flocculants. Generally speaking, the higher the molecular weight, the higher the flocculating activity; linear molecular flocculating activity of high molecular branched or crosslinked more, flocculation is worse; in the later period of cultivation of flocculant producing bacteria, cell surface hydrophobicity enhancement, flocculant activity is also higher. The surface structure and charge of colloidal ions in