This paper presents the research work of treating straw pulp gray water by ABR, SBR and combined processing method of ABR-SBR Results have shown: as the HRT is 6 h, ABR raises the biodegradability (BOD 5/COD)value from 0 2-0 25 to 0 4-0 5;
Experiments were carried out to study process treating middle stage wastewate from straw pulping. The results were as follows: organic compounds in the wastewater were reduced effectively and CODCr decreasing rate got to 85% when aerated 5 hours,pH 8 and volume load rate (VLR) of 1.30 kgCODCr/(m3·d).
It is pointed out that aspens are the best raw material making high yield pulps,and that development of straw high yield pulps is an important way that eliminates the pollution of chemical straw pulps.
Lime grass pulp paper-making wastewater was treated by the photocatalytic oxidation process. The effects of ZnO and H_2O_2 dosage,influent pH,radiation time and intensity on COD removal were examined.
The objectives of this study were to determine if black liquor from wheat straw pulping with KOH improves soil quality including soil aggregation, microbial biomass and microbial activity, and corn yield.
The results of this study suggest that the organic-rich waste liquor from wheat straw pulping with KOH may improve soil quality and soil test K without reducing crop productivity.