Method for promoting organic acid yield from sludge

Abstract

The invention belongs to envrionmental protection technique field, in detail relates to a method for increasing organic aicd output through adding anion surface active agent and controlling basic pH value. It takes primary sludge, excess sludge or mixture of them in wastewater treatment plant, converses organic matter in insoluble sludge to organic acid maximumly by adding anion surface active agent, controlling basic pH and employing bacteria function in said sludge. The ratio between consumption amount of anion surface active agent and sludge dry amount is 0.01: 1- 0.1- 1, the pH is controlled between 8 to 12 for bacteria action, the retention time of sludge in reactor is from 5 hours to 30 days. The invention increases organic acid output when makes full use of sludge and reduces environmental pollution.

Description

technical field

[0001] The invention belongs to the technical field of environmental protection and relates to a method for increasing the output of organic acids produced from sludge. Background technique

[0002] Wastewater biological nitrogen and phosphorus removal process is an important means to prevent water eutrophication. In the process of microbial removal of nutrients such as nitrogen and phosphorus, they need a large amount of dissolved organic compounds as carbon sources, such as easily biodegradable organic compounds (such as methanol, acetic acid, etc.) are conducive to the denitrification process, and short-chain fatty acids ( Including acetic acid, propionic acid, etc.) are beneficial to the enhanced biological phosphorus removal by phosphorus accumulating bacteria. However, in most cases, the short-chain fatty acids in wastewater cannot meet the needs of microorganisms to remove nitrogen and phosphorus at the same time, especially the concentration of organ...