Abstract

Dairy industries are highly polluting, energy and fresh water consuming installations. The present study aims to make dairy effluent treatment plant operation less time consuming with minimal energy consumption while generating a value added product. Analysis of the temporal and spatial variation in performance of a biofilm based plug flow reactor involved in the biotransformation of Dairy Waste Water (DWW) revealed ammonia (57.68 mg L^–1) rich liquid biofertilizer production within 4 h, with associated reduction of nitrate (70.77%), phosphate (36.44%), protein (62.87%), Biological Oxygen Demand (BOD) (26.38%) and Chemical Oxygen Demand (COD) (39.59%). The process was 4 times faster than the fastest existing process reported till date. The consortium showed a striking reduction in its doubling time from 78 min 56 sec (in suspension culture) to 17 min 10 sec (as biofilm) upon immobilization. It could produce 734.60 mg ammonia per kg of immobilization matrix from DWW. Metagenomic analysis revealed the robustness of the biofilm based biotreatment system. The novelty of this study is the innovative approach of rapid conversion of the waste from dairy industry into a value added product using microbes from geosphere in an energy efficient manner which would make dairy effluent treatment plant operation self-sustainable and eco-protective.

摘要

乳制品行业是高污染、能源和淡水消耗装置。本研究旨在使乳制品污水处理厂的运行时间更短，能耗最低，同时产生增值产品。对参与乳制品废水 (DWW) 生物转化的基于生物膜的活塞流反应器的性能时空变化进行分析显示氨 (57.68 mg L ^–1) 在 4 小时内生产丰富的液体生物肥料，同时减少硝酸盐 (70.77%)、磷酸盐 (36.44%)、蛋白质 (62.87%)、生物需氧量 (BOD) (26.38%) 和化学需氧量 (COD) (39.59) %）。该过程比迄今为止报告的最快的现有过程快 4 倍。该联合体显示其倍增时间从 78 分 56 秒（在悬浮培养中）显着减少到 17 分 10 秒（作为生物膜）。它可以从 DWW 中产生每公斤固定基质 734.60 毫克氨。宏基因组分析揭示了基于生物膜的生物处理系统的稳健性。