发明名称 |
Treating abattoir waste water to reduce COD - by adding sodium bentonite, polyvalent metal flocculating agent and flocculation auxiliary, e.g. acrylamide-acrylate] copolymer |
摘要 |
Waste water from albatross is purified by treating with; (1) 0.1-2 kg/cu.m of an Na bentonite (I) of high swelling capacity nad ion-exchange capacity (IEC) 60-110mVal/100g. which in aq. suspension produces a pH of 10-11; (2) as cationic flocculating agent (II) a soluble polyvalent metal salt or hydroxide at 50-1000m Val cations/cu.m., and (3) 0.2-15g/cu.m. of a cationic or anionic flocculation auxiliary (III) as aq. soln. The ratio of (1): (2) is such that before addn. of (3), the water has pH below 6.8 (opt. with addn. of acid). Pref. component (2) comprises as major components Al203 (Sic), FeCl3, CaCl2 and/or MgCl2, esp. an aq. soln. contg. (g/l) AlCl3, 45-60; FeCl3, 15-25; CaCl2, 4-8 and MgCl2, 9-15 at 0.3-3 l/cu.m. waste water. USE/ADVANTAGE - This method provides rapid and simple redn. in the COH of the water (in examples to about 11-15% of the original value) and good sepn. of the flocculated solids. Addn. of (3) provides a greater level of purification than possible with (1) and (2) only. The flocculated material can be used as cattle fodder and feed supple
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申请公布号 |
DE4201362(A1) |
申请公布日期 |
1992.08.20 |
申请号 |
DE19924201362 |
申请日期 |
1992.01.20 |
申请人 |
SUED-CHEMIE AG, 8000 MUENCHEN, DE |
发明人 |
HUBER, ANTON, 8051 HOERGERTSHAUSEN, DE |
分类号 |
B01J39/02;C02F1/52;C02F1/54 |
主分类号 |
B01J39/02 |
代理机构 |
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