Quick starting process of biofilm reactor in oligotrophic habitat

Abstract

The invention discloses a quick starting process of a biofilm reactor in an oligotrophic habitat, which comprises the following steps: (1) distributing 5-7 strings of elastic three-dimensional filler with the volume filling rate of 2-3 percent in a 90L of biofilm reactor and distributing 2-4 aeration sand tables at the bottom of the biofilm reactor; (2) pretreating substrate sludge of riverways of three potable water sources, mixing the substrate sludge according to the volume ratio of 2.5:3.0:4.5 to form inoculated sludge and paving 3-5L of the inoculated sludge at the bottom of the reactor; (3) filling sewage into the reactor, tightly sealing and aerating at the aeration amount of 240-260L / h for 2-3 days and completely draining the inoculated substrate sludge along the effluent; and (4) under the condition of intermittent of aeration for 3h and aeration stop for 3h, increasing the water-feeding flow of the reactor from 15ml / min to 30ml / min every fiver days at the increase speed of 4-6ml and finally continuously operating at the flow speed of 25-35ml / min for 2-3months. Compared with the prior art, the invention has the beneficial effects that: (1) quick starting of an aquatic film repairing system in a micro-polluted water source can be realized; and (2) a biofilm system has high operation performance in a stable state.

Description

technical field

[0001] The invention relates to a rapid start-up process of a biofilm reactor in an oligotrophic habitat. Background technique

[0002] In recent years, with the rapid development of my country's social economy, urban and rural drinking water sources have been polluted to varying degrees. Nitrogen, phosphorus and organic pollutants generally exceed the Class III standard in the "Environmental Quality Standards for Surface Water" (GB3838-2002). Numerous studies have shown that excessive organic matter and "tri-nitrogen" in drinking water source water will aggravate the formation of chlorinated disinfection by-products and cause methemoglobinemia, gastrointestinal cancer and other diseases, seriously affecting ecological security and human health.

[0003] Biofilm method is a widely used sewage (waste) water biological treatment and water plant pretreatment technology at home and abroad. It has great application potential in view of the low concentration of org...