WANGXin,WANGYu-qing,SUNJia-xin,et al.Treatment of Heparin Sodium Production Wastewater by Combined Process of Pretreatment, UASB and A/O[J].China Water & Wastewater,2022,38(18):120-124.
Treatment of Heparin Sodium Production Wastewater by Combined Process of Pretreatment, UASB and A/O
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第18期
Page:
120-124
Column:
Date of publication:
2022-09-17
- Keywords:
- heparin sodium production wastewater; total salt content; TN; pretreatment; UASB; A/O
- Abstract:
- In order to meet the higher requirements of current environmental discharge standards for total salt content, TN, TP and other indicators, based on the characteristics of high organic pollutant concentration, high ammonia nitrogen concentration and high inorganic salt concentration in heparin sodium production wastewater, the combined process of pretreatment, UASB and A/O is implemented in a wastewater treatment project with treatment capacity of 300 m3/d. In the pretreatment unit, chitosan is used as flocculant to recover protein, MgCl2 is added to react with ammonia nitrogen and phosphate in the wastewater to generate struvite precipitation for fertilizer, inorganic salts are crystallized and separated by mechanical vapor recompression (MVR), reducing the inhibitory effect of ammonia nitrogen and inorganic salts on the subsequent biochemical system. UASB is equipped with reflux system, and the COD removal rate can reach 75%. Under the condition that R is 50% and no internal reflux is required, the TN removal rate of segmented influent three-stage A/O process is 75%. The removal rates of COD, NH3-N, TN, TP and total salt of the effluent treated by the combined process are 99.7%, 99.2%, 98.8%, 99.8% and 99.2% respectively. At the same time, the resource utilization of protein, nitrogen, phosphorus fertilizer and biogas is realized.
Last Update:
2022-09-17