The issues with effluent are vast and the conditions you describe are a "normal" effect of effluent. The soils will continue to "tighten up" due to the growing bicarbonates. The best advice is to get water and soil samples to a testing labratory. Have them tested to include PH & Bicarbonates. There are a few "suppliments" such as the ESP unit and S02 generators.
At first blush, bicarbonate doesn't seem especially destructive. It's just a lonely anion seeking a long-term relationship with an attractive cation. But that cation is likely to be calcium and the bond the two ions create allows sodium to remain in the soil profile. Sodium is the principal cause of silting and surface sealing.
"Bicarbonate isn't a bad actor per se--sodium is--but bicarbonate allows sodium to become the soil's dominant ion, and that's bad," says Jon Voth, lab supervisor for Prodica, LLC.
High bicarbonate or alkalinity can also reduce the effectiveness of certain pesticides. Bicarbonate ties up magnesium, and it can form precipitates with pesticides.
It's even to blame for the short life of teakettles in Davis, Calif. "Here in Davis, teapots don't last long because you get that buildup of white caking. That cake is calcium and magnesium carbonates created when bicarbonate bonds with those elements," explains Mike Singer, professor of soil science in the Department of Land, Air & Water Resources (LA WR) at the University of California-Davis.
N-pHuric fertilizer and other strong acids are the usual solution to high bicarbonate in water. Lowering a water's pH to 6.5 removes about half of the bicarbonate; lowering it to 6.0 removes even more.
That means less bicarbonate is available to form precipitates that can plug irrigation sprinklers and emitters. A slightly acidic water also lowers soil pH for a time, making pH-sensitive nutrients like iron, zinc, magnesium, manganese, and phosphorus available to crops. It also breaks up calcium carbonate in the soil, freeing calcium to displace sodium on soil particle exchange sites. The sodium becomes soluble and eventually moves below the root zone.