Method for repairing arsenic-containing wastewater by using sludge
A sludge and wastewater technology, applied in water/sludge/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of limited arsenic adsorption efficiency, waste of resources, increased cost, etc. The effect of efficient utilization and low energy consumption
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0024] Example 1:
[0025] The method of using sludge to repair arsenic-containing wastewater involved in this embodiment specifically includes the following steps:
[0026] (2) Pre-cultivation of sludge
[0027] Select 200-500 parts of urban sewage plant sludge, industrial organic sludge or anaerobic digestion sludge according to parts by weight, add 70 parts by weight of ferrous sulfate and 40 parts of potassium nitrate, then put them in the incubator, stir and mix, and fill with nitrogen 20 -60 minutes, control the temperature at 20-30°C and leave it for 7-10 days to prepare pre-cultured sludge for use;
[0028] (2) Preparation of NAFO medium
[0029] Add the medium to the bioreactor according to the following weight ratio: NH 4 Cl 25-30 parts, K 2 HPO 4 20-30 parts, MgSO 4 10-15 parts, CaCl 2 1-3 parts, 80-410 parts of anhydrous sodium acetate, 80-170 parts of sodium nitrate or 100-210 parts of potassium nitrate, FeCl 2 ·4H 2 O200-400 parts or heptahydrate FeSO 4 270-560 parts ...
Example Embodiment
[0036] Example 2:
[0037] The sludge was taken from a sewage treatment plant in Jimo City, Qingdao. It was digested sludge. Take 200mL of sludge, add 0.71g of ferrous sulfate and 0.4g of potassium nitrate, infuse with nitrogen for 30min, and incubate at 25℃ for 7d. Take 10mL sample from the above pre-culture sludge and add it to 200mL sterile NAFO medium: NH 4 Cl 0.28g / L, K 2 HPO 4 0.25g / L,MgSO 4 0.1g / L, CaCl 2 0.01g / L, 20mM sodium acetate, 15mM sodium nitrate, FeCl 2 ·4H 2 O 15mM, adjust the pH to 7.0. Fill the reactor with nitrogen for 30 minutes, and let it stand for 8 days at 25°C. After culturing, the sludge turns from black to yellow-brown, and the biological iron flocculant is prepared.
[0038] After NAFO cultivation, the apparent color of the sludge changed significantly, from the original black with foul smell to yellow-brown flocs, and the smell disappeared. The relationship between the microbial community before and after NAFO cultivation was constructed by high-thr...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap